Arc Length Calculator
Calculate arc length, sector area, chord length, and arc-to-chord ratio from radius and central angle. Includes preset common angles, a properties table, and an arc diagram.
Free Other Calculators
24 toolsMiscellaneous math tools and specialty calculators. Browse our free other tools below — no sign-up required.
Associative Property Calculator
Demonstrate and verify the associative property for addition and multiplication. See counterexamples for subtraction and division with custom numbers, presets, and grouping visuals.
Average Rate of Change Calculator
Calculate the average rate of change (f(b)−f(a))/(b−a) for common functions. Includes secant line slope, comparison with instantaneous rate, interval table, and visual diagram.
Box Method Multiplication Calculator
Multiply polynomials using the box/area model method. Displays a visual grid, collects like terms, shows the expanded and simplified result with presets and step-by-step breakdown.
Central Angle Calculator
Calculate the central angle from arc length and radius. Find inscribed angle relationships, sector area, and segment properties with presets, properties table, and circle visual.
Change of Base Calculator
Apply the logarithm change of base formula to convert between any bases. Compare natural, common, and binary logarithms with a conversion table and visual comparison.
Clock Angle Calculator
Calculate the angle between the hour and minute hands of an analog clock. Shows reflex angle, hand positions, and a clock face visual with a full-day angles table.
Coin Rotation Paradox Calculator
Explore the coin rotation paradox: how many times does a coin rotate when rolling around another? Handles inner/outer rolling, different radii, path length, and demonstrates the paradox with visuals.
Column Space Calculator
Find the column space of a matrix including basis vectors, rank, nullity, and RREF steps. Supports matrices up to 6×6 with presets and step-by-step row reduction.
Common Multiple Calculator
Find the LCM, GCD, and first N common multiples of two or more numbers. Includes prime factorization table, multiples overlap visualization, and preset number sets.
Compatible Numbers Calculator
Find compatible number pairs for mental math estimation. Compare rounding strategies, see error percentages, and discover the most accurate estimation approach for any arithmetic operation.
Condition Number Calculator
Compute the matrix condition number κ(A) in 1-norm, ∞-norm, and Frobenius norm. Checks if a matrix is well or ill-conditioned with sensitivity visualization.
Conjugate Calculator
Find the complex conjugate or radical conjugate of a number. Computes modulus, argument, product z·z̄, rationalization, and displays an Argand diagram.
Cycloid Calculator
Calculate cycloid curve properties: arc length, area under arch, cusps, parametric points, surface of revolution. Includes interactive curve plot and properties table.
Decagon Calculator
Calculate all properties of a regular decagon: perimeter, area, apothem, circumradius, interior angles, diagonals. Input by side, radius, apothem, area, or perimeter.
Diameter to Radius Calculator
Convert between diameter, radius, circumference, and area of a circle. Batch mode for multiple values, circle diagram, and complete conversion table.
Diamond Problem Calculator
Solve diamond factoring puzzles: find two numbers given their product and sum, or reverse. Visual diamond shape, presets for common problems, solutions table, and step-by-step factoring breakdown.
Digital Root Calculator
Compute the digital root (repeated digit sum) of any number. Shows iteration steps, divisibility-by-9 connection, multiplicative digital root, additive persistence, and digit frequency analysis.
Distributive Property Calculator
Demonstrate and verify the distributive property a(b+c) = ab + ac with numbers. Expand expressions, see step-by-step verification, area model visual, and comparison table for multiple examples.
Dodecagon Calculator
Calculate regular dodecagon (12-sided polygon) properties: perimeter, area, diagonals, interior/exterior angles, apothem, inradius, circumradius. Presets, properties table, and polygon visual.
Doubling Time Calculator
Calculate doubling time from a growth rate using the Rule of 72, exact formula, and continuous compounding. Also tripling time, comparison table across rates, and exponential growth curve visual.
Elimination Method Calculator
Solve 2×2 and 3×3 systems of linear equations by elimination. Step-by-step multiply-and-add operations, presets for common systems, elimination steps table, and solution coordinate visual.
Endpoint Calculator
Find a missing endpoint given a midpoint and the other endpoint in 2D or 3D. Distance verification, calculation steps, presets for common problems, coordinate visualization, and formulas.
Engineering Notation Calculator
Convert numbers to engineering notation (exponents that are multiples of 3), SI prefix lookup, comparison with scientific notation, magnitude scale visual, presets for common values.