1099 Tax Calculator
Free 2026 1099 tax calculator for independent contractors. Estimate income tax, self-employment tax, QBI deduction, and quarterly payments on 1099 net income.
7,067+ Calculators
Browse our complete library of calculators, organized across 31 categories and hundreds of subcategories. Find the page that matches your task.
Financial
480 calculatorsMoney, loans, investing, and retirement calculators.
15-Year vs 30-Year Mortgage Comparison Calculator
Compare 15-year vs 30-year mortgage payments, total interest, and savings side by side. See how much you save with a shorter term and decide which is right for you.
3x Rent Calculator
Calculate if your income meets the 3x rent rule. Compare 30% rule, 25% rule, and 50/30/20 budgets with income qualification tables and housing affordability analysis.
4% Rule Calculator
Free 4% rule retirement calculator. Find out how much you can safely withdraw each year based on the Trinity Study. See your annual income, monthly income, and required portfolio size.
Health & Fitness
692 calculatorsBody metrics, nutrition, and training calculators.
20/20 Vision Calculator
Convert Snellen visual acuity to LogMAR, decimal, and MAR. Check driving eligibility and compare vision classification across international standards.
4Ts Score Calculator (HIT)
Calculate the 4Ts score for heparin-induced thrombocytopenia (HIT) probability. Classifies patients into low, intermediate, or high pretest-probability bands.
5/3/1 Lifting Program Calculator
Calculate your Wendler 5/3/1 training maxes, weekly sets, reps, and percentages for squat, bench, deadlift, and overhead press.
5K/10K Training Pace Calculator
Calculate training paces for 5K and 10K races using VDOT-based methodology. Get easy, tempo, interval, and repetition pace zones from a recent race time.
Business & Pricing
158 calculatorsPricing, profitability, and sales calculators for businesses.
409A Valuation Estimator
Estimate a simplified 409A fair market value for common stock using the backsolve method from the latest preferred round price with typical discounts.
A/B Price Test Sample Size Calculator
Calculate the minimum sample size needed for a statistically significant A/B price test. Set confidence level, power, and minimum detectable effect.
A/B Test Sample Size Calculator
Calculate the required sample size for statistically significant A/B tests. Input baseline rate, minimum detectable effect, significance, and power.
ABC Inventory Analysis Calculator
Classify inventory using Pareto-based ABC analysis. Identify A, B, and C items by value and volume to prioritize inventory management efforts.
Real Estate
171 calculatorsBuying, selling, renting, and real estate investing calculators.
1031 Exchange Boot Calculator
Calculate taxable boot in a 1031 exchange including cash boot (proceeds not reinvested) and mortgage boot (debt relief exceeding new debt). Avoid unexpected taxes.
1031 Exchange Calculator
Calculate 1031 exchange boot, tax deferral, and reinvestment requirements. Follow 45/180-day timelines and determine minimum replacement property value.
1031 Exchange Timeline Calculator
Track critical 1031 exchange deadlines: Day 0 sale closing, Day 45 identification deadline, and Day 180 closing deadline. Never miss a tax-deferred exchange date.
70% Rule Calculator for House Flipping
Calculate your maximum offer price using the 70% rule: Max Offer = ARV × 70% minus estimated rehab costs. Essential for evaluating flip deals.
E-commerce
159 calculatorsPricing, fees, shipping, and conversion calculators for online sellers.
3PL Cost Calculator
Estimate third-party logistics (3PL) fulfillment costs per order including receiving, storage, pick-pack, shipping, and account management fees.
A/B Test Revenue Impact Calculator
Estimate the annualized revenue impact of an A/B test winner. Project how a conversion rate lift translates to additional dollars over time.
A/B Test Statistical Significance Calculator
Test whether your A/B test results are statistically significant. Enter visitors, conversions for control and variant to get the Z-score and p-value.
Actual vs DIM Weight Calculator
Compare actual weight vs dimensional weight for your package. Find billable weight and calculate the cost delta when DIM weight exceeds actual weight.
Marketing & SEO
181 calculatorsSEO, paid ads, email, and analytics calculators.
A/B Ad Test Sample Size Calculator
Calculate the required sample size for statistically significant A/B ad tests. Determine how many impressions or clicks you need for reliable test results.
Abandoned Cart Email Revenue Calculator
Calculate potential revenue from abandoned cart email sequences. Estimate recovery rate, conversions, and incremental revenue.
Ad Conversion Rate Calculator
Calculate your ad conversion rate from clicks and conversions. Benchmark conversion rates by industry, platform, and landing page to optimize campaigns.
Ad Fatigue Estimator
Estimate ad fatigue by comparing current CTR to initial CTR. Calculate your fatigue index and determine when to refresh creatives for optimal performance.
Construction
239 calculatorsMaterial estimation and construction planning calculators.
Accent Wall Paint Calculator
Calculate paint needed for a single accent wall. Enter wall dimensions, subtract openings, and choose coverage rate to estimate gallons for your feature wall.
Acoustic Insulation Calculator
Calculate sound insulation materials for walls and ceilings. Enter wall area and target STC rating to determine insulation quantity for effective noise reduction.
Attic Insulation Depth Calculator
Calculate how much additional attic insulation depth you need. Enter current and target R-values to determine the inches of new insulation required to meet code.
Attic Ventilation Calculator
Calculate required attic ventilation NFA using the 1/150 or 1/300 rule. Determines total, intake, and exhaust net free area for proper attic airflow.
Automotive
137 calculatorsFuel economy, car loans, and vehicle cost calculators.
5-Year Car Depreciation Calculator
Estimate your car's value after 5 years by vehicle category. See how trucks, luxury, economy, and EV models depreciate differently.
60 vs 72 vs 84-Month Loan Calculator
Compare 60, 72, and 84-month auto loan terms side by side. See how longer terms lower payments but increase total interest and negative equity risk.
AAA Membership Break-Even Calculator
Calculate whether an AAA membership pays for itself through towing savings, discounts, and other member benefits. Find your personal break-even point.
Accident Fault Insurance Impact Calculator
Calculate how much an at-fault accident increases your car insurance premium over time. See the total surcharge cost over 3–5 years.
Education
142 calculatorsGrade, GPA, and study planning calculators.
529 Growth Projection Calculator
Project your 529 plan balance at college enrollment under conservative, moderate, and aggressive investment scenarios side by side.
529 Plan Savings Calculator
Calculate your 529 college savings plan growth with tax-free compounding. Project future balance from initial deposit and monthly contributions.
Academic Index Calculator (Ivy League)
Calculate your Academic Index (AI) score used by Ivy League schools. Combines GPA rank, SAT/ACT scores, and SAT Subject Tests on a 60-240 scale.
Academic Probation Calculator
Check if your GPA puts you on academic probation and plan your recovery. Calculate the grades you need to return to good academic standing.
Tech & DevOps
415 calculatorsDownload time, storage, uptime, and security calculators.
3D Printing Cost Calculator
Estimate 3D printing costs including filament, electricity, time, and wear. Compare materials and optimize your print settings for the best value.
3D Render Time Calculator
Estimate 3D rendering time based on scene complexity, resolution, samples, and hardware. Compare CPU vs GPU rendering and plan your render farm budget.
Absorption Rate Calculator
Calculate real estate absorption rate, months of inventory, and market pace. Analyze buyer vs seller market conditions with historical comparison tools.
AES Key Size Comparison Calculator
Compare AES-128, AES-192, and AES-256 key sizes by total combinations, brute-force resistance, and estimated crack times.
Productivity
384 calculatorsTime management, salary, math utilities, and measurement conversion calculators.
0-60 MPH Calculator
Estimate your vehicle's 0-60 mph time based on horsepower, weight, drivetrain, tires, and altitude. Compare quarter mile times and power-to-weight ratios.
100-Day Calculator
Calculate the exact date 100 days from any start date. Find milestones, weekday, weekly breakdown, and monthly distribution.
1099 vs W-2 Calculator
Compare 1099 contractor income to W-2 employee salary. Factor in self-employment tax, insurance, benefits, and PTO to find the equivalent rate.
120-Day Calculator
Calculate the exact date 120 days from any start date. Get milestones, weekday info, and monthly breakdown for 120-day planning periods.
Travel
141 calculatorsTrip planning, distance, currency, accommodation, and special travel calculators.
Accessible Travel Cost Calculator
Estimate the extra costs that can appear when a trip requires accessible rooms, adapted transport, mobility equipment, or aide support.
Airbnb Cleaning Fee Breakdown Calculator
Break down Airbnb cleaning fees per night. See how cleaning, service fees, and taxes affect your true nightly rate for short and long stays.
Airbnb True Cost Per Night Calculator
Calculate the real Airbnb nightly cost with cleaning fees, service fees, and taxes included. Compare the listed rate against what you actually pay per night.
Airbnb vs Hotel Calculator
Compare the true cost of an Airbnb rental versus a hotel stay including cleaning fees, service fees, resort fees, and taxes.
Legal
124 calculatorsContract, claims, compliance, estate, and business law calculators.
ADA Compliance Cost Calculator
Estimate Americans with Disabilities Act compliance costs including website remediation, physical modifications, legal review, staff training, and audit expenses.
Adoption Cost Estimator
Free adoption cost calculator. Estimate total adoption expenses including home study, agency fees, legal costs, court fees, and travel expenses.
Alimony Estimator
Free alimony calculator estimates spousal support payments using income differential, duration factor, and state modifier formulas.
AML Compliance Cost Calculator
Estimate anti-money laundering program costs including KYC, transaction monitoring, SAR filing, staff training, and technology for BSA/AML regulatory compliance.
HR & Payroll
165 calculatorsPayroll, benefits, hiring, retention, and workforce planning calculators.
401(k) Match Cost Calculator
Estimate total employer 401(k) matching cost based on salary, employee contribution rates, and match formula across all participating employees.
401(k) Pre-Tax Deduction Calculator
Calculate 401(k) pre-tax deductions per paycheck using annual elective-deferral and catch-up limits.
Absence Rate Calculator
Calculate employee absence rate by type. Break down absences into sick, personal, unplanned, and other categories to measure and manage workforce absenteeism.
Absenteeism Cost Calculator
Calculate the total cost of employee absenteeism including direct wages, replacement labor, lost productivity, and administrative overhead per absence event.
Insurance
160 calculatorsAuto, home, life, health, dental, vision, disability, and specialty insurance calculators.
20-Year vs 30-Year Term Life Insurance Comparison
Compare 20-year and 30-year term life insurance costs, total premiums, and coverage gap to find the best term length.
ACA Premium Tax Credit Calculator
Estimate your Affordable Care Act marketplace premium tax credit (subsidy) based on household income, size, and benchmark plan cost.
Accident Surcharge Total Cost Calculator
Calculate the total cost of an accident surcharge on your auto insurance. See how much a single claim raises your premiums over 3-5 years.
Accidental Death & Dismemberment (AD&D) Value Calculator
Evaluate AD&D insurance value by comparing the benefit, probability of accidental death, and annual premium cost.
Hospitality
136 calculatorsRestaurant, hotel, staffing, and event calculators for food cost, revenue, and operations.
ADR Index Calculator — Average Daily Rate vs Comp Set
Calculate your ADR Index (ARI) by comparing your hotel's ADR against the competitive set average. Benchmark pricing performance against the market.
Agency Markup Calculator
Calculate the staffing agency markup percentage by comparing the agency bill rate to the worker's actual pay rate in hospitality.
AV Equipment Cost Calculator
Calculate total AV equipment rental cost by summing equipment rentals and tech labor. Budget audio-visual for events accurately.
Average Check Calculator
Calculate your restaurant’s average check size by dividing total revenue by the number of guests. Track spending trends and set targets.
Manufacturing
222 calculatorsUnit cost, OEE, Six Sigma, capacity planning, lean, and supply chain calculators.
5 Why Analysis Score Calculator
Score your 5 Why root cause analysis by depth and evidence strength. Determine if your investigation reaches actionable root causes.
5S Audit Score Calculator
Calculate your 5S audit score from Sort, Set in Order, Shine, Standardize, and Sustain ratings. Assess workplace organization and lean maturity.
A3 Problem Solving Savings Calculator
Calculate savings from A3 problem solving projects. Track the financial return of root cause analysis and countermeasure implementation.
Absorption Costing Calculator
Calculate full product cost using absorption costing by allocating direct materials, direct labor, variable overhead, and fixed overhead to each unit.
Logistics
139 calculatorsInventory, shipping, freight, warehouse, fulfillment, and transportation calculators.
ABC Analysis Calculator
Classify inventory into A, B, and C categories based on annual value using Pareto analysis to prioritize stock management efforts.
ABC-XYZ Matrix Calculator
Combine ABC value analysis and XYZ demand variability into a 9-cell matrix to set differentiated inventory management strategies.
Accessorial Charges Calculator
Calculate freight accessorial charges including liftgate, inside delivery, appointment scheduling, and residential delivery fees for LTL shipments.
AGV/AMR Utilization Calculator
Calculate AGV or AMR fleet utilization percentage by comparing productive transport time to total available time. Optimize your robot fleet.
Agriculture
175 calculatorsSeed rate, fertilizer, irrigation, and livestock calculators.
Acres per Hour Calculator
Calculate effective field capacity in acres per hour from implement width, travel speed, and field efficiency for operation planning and scheduling.
Adjusted 205-Day Weaning Weight Calculator
Calculate the adjusted 205-day weaning weight for beef calves using actual weight, birth weight, age, and dam age factor. Free calf performance tool.
Animal Unit Equivalent Calculator
Calculate animal unit equivalents (AUE) for any livestock species based on body weight.
Aquaponic Feed-to-Plant Ratio Calculator
Calculate the balanced ratio of fish feed input to plant growing area in aquaponic systems. Match nutrient output from fish to plant uptake capacity.
Pets
103 calculatorsPet age, calorie, and care calculators.
Adult Cat Weight Predictor
Predict your kitten's adult weight using the 16-week doubling method and breed-specific adjustments. Estimate how big your cat will get.
Adult Dog Weight Predictor
Predict your puppy's adult weight using breed-size formulas. Small breeds: 6-week weight × 4, Medium: 14-week × 2.5, Large: 20-week × 2, Giant: 24-week × 2.
Annual Pet Checkup Cost Calculator
Estimate the cost of annual wellness visits for your pets. Exam fees, vaccinations, lab work, dental cleanings, and preventive care by species.
Aquarium Cost Calculator
Estimate the total cost of setting up and maintaining an aquarium. Includes equipment, livestock, electricity, food, and supplies.
Parenting & Family
137 calculatorsPregnancy, baby, and childcare cost calculators.
529 Plan Contribution Calculator
Calculate how your 529 plan contributions grow over time. Project future value with monthly deposits, expected returns, and years until college.
Adjusted Age Calculator for Preemies
Calculate your premature baby's adjusted age by subtracting weeks born early from chronological age. Free preemie age tool.
Adoption Cost Calculator
Estimate domestic or international adoption costs including agency, legal, home study, and travel expenses. Plan your adoption budget.
Adoption Tax Credit Calculator
Calculate your Adoption Tax Credit of up to $15,950 per child. See phase-out amounts based on modified AGI between $239,230 and $279,230.
Gaming
137 calculatorsPC hardware, streaming, game mechanics, and gaming finance calculators.
1% Low FPS Stutter Calculator
Calculate the stutter ratio from your 1% low FPS and average FPS. Identify micro-stuttering issues and frame consistency problems in your gaming performance.
Accuracy Impact on DPS Calculator
See how accuracy affects your real DPS output. Enter theoretical DPS and accuracy percentage to calculate your actual damage per second.
Affiliate Link Income Calculator
Estimate affiliate link income for streamers and content creators. Calculate earnings from clicks, conversion rates, order values, and commission rates.
Algorithm Engagement Score Calculator
Calculate a weighted engagement score modeling how YouTube's algorithm evaluates your content. Combine watch time, CTR, likes, and comments into one metric.
Crypto
163 calculatorsTrading, DeFi, mining, tax, NFT, and Web3 calculators for the crypto ecosystem.
ASIC Comparison Calculator
Compare up to 3 ASIC miners side by side. Evaluate hash rate, power consumption, efficiency, daily profit, and ROI to find the best mining hardware.
Bitcoin Mining Profitability Calculator
Calculate Bitcoin mining profitability based on hash rate, electricity cost, pool fees, and the BTC price you enter. Estimate daily, monthly, and yearly profit.
Chia Storage Mining Cost Calculator
Calculate Chia (XCH) farming costs and revenue. Estimate plotting costs, storage requirements, expected earnings, and ROI for Chia proof-of-space mining.
Crypto Airdrop Tax Calculator
Calculate income tax on cryptocurrency airdrops. Estimate tax owed on free tokens received based on fair market value at the time of receipt.
Energy & Environment
213 calculatorsElectricity cost, solar savings, carbon footprint, water usage, and waste management calculators.
AC Cost per Hour Calculator
Find out how much your air conditioner costs to run per hour. Enter AC wattage and electricity rate for instant cost estimates.
AI Water Footprint Calculator
Calculate the water consumption of AI model training and inference. Estimate cooling water usage for data centers running large language models and ML workloads.
Air Change Rate (ACH) Calculator
Calculate the air changes per hour (ACH) for a room or building. Determine ventilation rate from airflow volume and room size.
Air Sealing ROI Calculator
Calculate the payback period and return on investment for air sealing your home. Estimate annual energy savings from reduced air leakage.
Math
696 calculatorsGeometry, algebra, trigonometry, arithmetic, and number theory calculators.
2D Distance Calculator
Calculate the distance between two points in 2D space using Euclidean, Manhattan, or Chebyshev metrics. Also computes midpoint, slope, and component breakdown.
2D Rotation Calculator — Rotate Points, Matrix & Common Rotations
Rotate a 2D point by any angle about any center. See the rotation matrix, new coordinates, displacement, and a table of common rotations (90°, 180°, 270°). Presets and rotation rules included.
30-60-90 Triangle Calculator
Calculate all sides, area, perimeter, altitudes, and radii of a 30-60-90 special right triangle. Enter any one side and get every property from the same ratio setup.
3D Distance Calculator
Calculate the Euclidean distance between two points in 3D space, plus midpoint, direction cosines, direction angles, and 2D projection comparisons.
Physics
497 calculatorsMechanics, electromagnetism, thermodynamics, optics, and astrophysics calculators.
100 Amp Wire Size Calculator
Calculate the correct wire gauge for 100-amp circuits. NEC ampacity tables for copper and aluminum conductors with voltage drop analysis.
12V Wire Size Calculator
Calculate correct wire gauge for 12V DC systems. Automotive, solar, marine, and LED applications with voltage drop analysis.
220V Wire Size Calculator
Calculate wire gauge for 220/240V circuits. Size conductors for appliances, HVAC, EV chargers, and welders with NEC ampacity tables.
24V Wire Size Calculator
Calculate wire gauge for 24V systems. HVAC thermostats, landscape lighting, sprinkler valves, and access control with voltage drop limits.
Conversion
284 calculatorsUnit conversion calculators for length, weight, volume, temperature, speed, and more.
Acreage Calculator
Calculate acreage from square feet, square meters, hectares, or square miles. Visual area bar, real-world comparisons, square-side dimension, and conversion factors table.
Acres to Hectares Converter
Convert acres to hectares and hectares to acres. Visual scale comparison, quick conversion table, square-side dimensions, and real-world size comparisons.
Acres to Square Feet Converter
Convert acres to square feet and 7 other area units. Includes landmark comparisons, lot equivalents, and a visual size reference chart.
Ångström to Nanometer Conversion
Convert ångströms to nanometers and 6 other sub-micro units. Includes molecular bond presets, spectrum visualizer, and atomic-scale reference table.
Statistics
158 calculatorsDescriptive statistics, probability, distributions, regression, and hypothesis testing calculators.
10-Sided Dice Roller
Roll d10 dice online with customizable count, modifiers, keep highest/lowest, and exploding dice. Perfect for RPGs, percentile rolls, and probability games.
2 Dice Roller
Roll two dice online with adjustable sides, modifiers, drop highest/lowest, and target checks. Full sum distribution and doubles tracking included.
4-Sided Dice Roller
Roll d4 dice online with modifiers, keep highest/lowest, reroll 1s, and preset configurations. Track face frequency and review full roll history.
5-Number Summary Calculator
Calculate the five-number summary (min, Q1, median, Q3, max) with IQR, outlier detection, box plot visualization, decile table, and Bowley skewness for any dataset.
Biology
89 calculatorsGenetics, ecology, lab science, gardening, and animal biology calculators.
Allele Frequency Calculator
Calculate allele and genotype frequencies using Hardy-Weinberg equilibrium. Supports observed counts, chi-square testing, and population genetics analysis.
Animal Mortality Rate Calculator
Calculate mortality rate, survival rate, and life expectancy for wildlife populations. Includes life table analysis, survivorship curves, and population projections.
Annealing Temperature Calculator
Calculate optimal PCR primer annealing temperature using nearest-neighbor thermodynamics, basic Tm formulas, and salt-adjusted methods for reliable amplification.
Bacteria Growth Calculator
Calculate bacterial population growth using exponential and logistic models. Estimate doubling time, generation count, and colony size over time.
Chemistry
103 calculatorsStoichiometry, solutions, reactions, organic, and electrochemistry calculators.
Activation Energy Calculator
Calculate activation energy using the Arrhenius equation with two-temperature rate data. Supports Ea from rate constants, frequency factor estimation, and temperature dependence analysis.
Activity Coefficient Calculator
Calculate activity coefficients using the Debye-Hückel equation for electrolyte solutions. Determine ion activity from ionic strength and charge.
Actual Yield Calculator
Calculate actual yield from theoretical yield and percent yield. Determine real product amounts accounting for reaction efficiency and side reactions.
Air-Fuel Ratio (AFR) Calculator
Calculate stoichiometric and actual air-fuel ratios for combustion reactions. Determine equivalence ratio, lambda, and excess air percentage.
Food & Cooking
67 calculatorsCooking, baking, beverages, nutrition, and party planning calculators.
Alcohol By Volume (ABV) Calculator
Calculate ABV from original and final gravity readings for homebrewing. Supports beer, wine, mead, and cider with attenuation and calorie estimates.
Alcohol Dilution Calculator
Calculate how much water to add to reduce alcohol concentration. Perfect for diluting spirits, proofing down whiskey, and adjusting cocktail strength.
Bacon Curing Calculator
Calculate salt, sugar, and curing salt amounts for homemade bacon. Supports dry cure and wet brine with Prague Powder #1 safety ratios.
Baker's Percentage Calculator
Calculate baker's percentages for bread and pastry recipes. Convert between weight and percentage for flour, water, salt, yeast, and other ingredients.