Alligation Calculator
Calculate mixing ratios and volumes for blending two solutions of different concentrations using the alligation method.
Free Solutions Calculators
18 toolsMolarity, dilution, osmolarity, and concentration calculators. Browse our free solutions tools below — no sign-up required.
Bleach Dilution Calculator
Calculate how much bleach and water to mix for any target ppm concentration. Covers CDC, WHO, and EPA disinfection guidelines.
Buffer Capacity Calculator
Calculate buffer capacity (β), efficiency, and the amount of acid or base needed to shift pH for any buffer system at a given concentration.
Buffer pH Calculator
Calculate the pH of any buffer solution using the Henderson-Hasselbalch equation. Supports common buffer systems and custom pKa values.
Concentration Calculator
Convert between molarity, g/L, ppm, ppb, and percent concentration. Calculate the mass of solute needed for any solution.
Degree of Unsaturation Calculator
Calculate the degree of unsaturation (DoU / IHD) from a molecular formula. Determine double bonds, triple bonds, and rings.
Dilution Factor Calculator
Calculate dilution factors, volumes, and multi-step dilution protocols. Convert between stock and final concentrations with step-by-step guidance.
Hydrogen Ion Concentration Calculator
Convert between pH, [H⁺], and [OH⁻]. Calculate hydrogen and hydroxide ion concentrations from pH or vice versa.
Mass Percent Calculator
Calculate mass percent (w/w%), mass fraction, and ppm from solute and solution masses or from molarity and density.
Molality Calculator
Calculate molality (mol/kg), convert to molarity, and compute colligative properties like boiling point elevation and freezing point depression.
Normality Calculator
Calculate normality (N), equivalent weight, and milliequivalents. Convert between normality and molarity for acid-base and redox reactions.
Osmotic Pressure Calculator
Calculate osmotic pressure using π = iMRT. Convert between atm, kPa, mmHg, and psi. Determine osmolarity and tonicity for biological solutions.
Percent Solution Calculator
Calculate w/v%, v/v%, and w/w% solution concentrations. Convert between percent types and determine the amount of solute for any target volume.
Protein Solubility Calculator
Estimate protein solubility based on pH, pI, ionic strength, and temperature. Assess precipitation risk and salt effects for protein solutions.
Raoult's Law Calculator
Calculate vapor pressure lowering, partial pressures, and vapor phase composition using Raoult's law for ideal solutions.
Serial Dilution Calculator
Calculate multi-step serial dilution protocols with concentrations, volumes, and visual pipelines. Supports CFU, cells, µg/mL, and molar units.
Solution Dilution Calculator
Use the C₁V₁ = C₂V₂ dilution equation to solve for any unknown. Calculate stock volume, final volume, or concentration for any dilution.
Titration Calculator
Calculate equivalence point volume, pH, and indicator selection for acid-base and redox titrations. Includes titration curve data.