Math & Algebra
169 free math & algebra tools in the Calculators & Converters collection — every one runs in your browser with no signup and no uploads. Page 2 of 2.
Prime Factorization Calculator
Break any whole number down into its prime factors instantly.
Percentage of Total Calculator
Turn a list of values into each value's share of the total.
Cubic Meters to Liters Converter
Convert m³ to liters (and back) instantly.
Acceleration Calculator
a = (v_f − v_i) ÷ t — solve for acceleration, velocity, or time.
Percentile Calculator
Find any percentile of a data set — or a value's rank.
Degrees to Radians Converter
Convert degrees to radians instantly — rad = ° × π ÷ 180. Free, browser-only.
Radians to Degrees Converter
Convert radians to degrees instantly — ° = rad × 180 ÷ π. Free, browser-only.
Percentage Difference Calculator
Find the percentage difference between two values.
Weighted Average Calculator
Average values that carry different weights.
Rounding Calculator
Round numbers to decimals, multiples or whole numbers.
Add Business Days
Add or subtract business days from a date, skipping weekends.
2D Vector Calculator
Add, subtract, dot, cross and find the angle between 2D vectors.
Complex Number Calculator
Add, subtract, multiply and divide complex numbers with modulus and argument.
Set Operations Calculator
Union, intersection, difference and symmetric difference of two sets.
Modular Exponentiation Calculator
Compute (base ^ exponent) mod modulus for huge numbers.
Class Rank Percentile Calculator
Turn your class rank into a percentile and top-percent figure.
Attendance Percentage Calculator
Check your attendance percentage and absences left.
Debt-to-Income Ratio Calculator
See your DTI ratio and where you stand with lenders.
Decision Matrix Maker
Score options against weighted criteria and find the ranked winner.
Date Duration Calculator
Exact years, months, days and hours between two dates — plus add or subtract a duration.
Roman Numeral Math Calculator
Add, subtract, multiply and divide directly in Roman numerals — with a full step-by-step explanation.
Math Worksheet Generator
Build printable arithmetic worksheets with a matching answer key.
Aspect Ratio Crop & Letterbox Calculator
Convert any resolution to a new aspect ratio: crop, letterbox, area kept and storage cost.
Debt-to-Income Ratio Calculator
Add up your monthly debts and income to see your DTI and where it lands with lenders.
GCD & LCM Calculator
Find the greatest common divisor and least common multiple of any integers — with Euclid steps.
Ratio Calculator
Simplify ratios, solve proportions and scale ratios — with the working shown.
Fraction Calculator
Add, subtract, multiply and divide fractions with full working shown.
Percentage Calculator
One tool for every percentage question — of, is-what-%, change, difference, increase, decrease and reverse.
Prime Number Checker
Test any number for primality, factorise it, and list every prime up to N.
Quadratic Equation Solver
Enter a, b, c and get the roots, discriminant, vertex, axis and full working.
Scientific Notation Converter
Convert decimals to scientific, engineering and E-notation with significant figures.
Dot Product Calculator
Compute dot products, angles, projections and cross products for 2D–5D vectors.
Matrix Determinant Calculator
Find the determinant of any 2×2 to 6×6 matrix with full step-by-step working.
Modular Exponentiation Calculator
Compute (a^b) mod m instantly — even for enormous cryptographic-size exponents.
Exponential Growth & Decay Calculator
Solve N(t) = N₀·e^(rt) — find future value, initial value, rate, or time.
Matrix Multiplication Calculator
Multiply, invert, transpose or find the determinant of matrices up to 6x6.
Cross Product Calculator (3D Vectors)
Compute a × b instantly — magnitude, angle, area and unit normal.
Vector Magnitude Calculator
Find the length of any 2-D, 3-D or n-D vector, get the unit vector and direction angles.
Cubic Equation Solver
Find all three roots of ax³ + bx² + cx + d = 0 with full working shown.
Decimal to Fraction Calculator
Convert any decimal — including repeating decimals — to its exact simplest fraction, with full step-by-step working.
Big Factorial Calculator — Exact BigInt Up to 10,000!
Compute exact factorials with BigInt, digit counts, scientific notation and full working steps.
Fibonacci Calculator
Find any Fibonacci number instantly, explore the golden ratio, and visualise the spiral.
Fraction to Percent Calculator
Convert any fraction, mixed number, or decimal to a percentage instantly.
Geometric Sequence Calculator
Find any term, the common ratio, or the sum of a geometric sequence instantly.
Greatest Common Factor Calculator
Find the GCF of two or more numbers with full prime-factor working and Euclid steps.
Percent Off Calculator
Find the sale price, saving, or original price for any discount instantly.
Quadratic Formula Calculator
Solve ax² + bx + c = 0 instantly — real and complex roots, full working, parabola diagram.
Simplify Fraction Calculator
Reduce any fraction to its lowest terms instantly, with full working shown.
System of Equations Solver
Solve 2x2 and 3x3 linear systems instantly with full working steps.
Least Common Multiple Calculator
Find the LCM of any list of integers — with prime-factor table, step-by-step working, and a cycle diagram.
Arithmetic Sequence Calculator
Find any term, the sum, or a missing value in an arithmetic sequence.
Cross-Multiplication Calculator
Solve any proportion instantly — enter three values, get the fourth.
Percent Error Calculator
Find the percent error between a measured and accepted value — or solve backwards.
Proportion Calculator
Solve any missing value in a/b = c/d instantly using cross-multiplication.
Summation Calculator
Compute sigma notation sums instantly — custom expressions, arithmetic, geometric, power, and harmonic series.
WACC Calculator
Compute the Weighted Average Cost of Capital with CAPM equity cost and the full tax shield.
Angle Between Vectors Calculator
Find the angle between any two 2-D, 3-D, or 4-D vectors — with full working.
Sine, Cosine & Tangent Calculator
Compute all six trig functions, inverses, unit-circle coordinates and wave graphs instantly.
Cartesian to Polar Calculator
Convert (x, y) to (r, θ) — or reverse — with full working and unit options.
Degrees to Radians Calculator
Convert degrees to radians, see trig values, arc length, sector area and angular motion — all in one tool.
Inverse Trig Calculator
Find angles from ratios — arcsin, arccos, arctan, arccot, arcsec, arccsc and the hyperbolic inverses.
Polar to Cartesian Calculator
Convert polar (r, θ) to Cartesian (x, y) — or reverse — instantly with step-by-step working.
Radians to Degrees Calculator
Convert any angle — see the formula, trig values, DMS and unit-circle coordinates instantly.
Trigonometric Identity Calculator
Verify and evaluate every major trig identity — basic, Pythagorean, double-angle, half-angle, sum-difference, product-to-sum, power-reduction, co-function and inverse.
Coffee-to-Water Ratio Calculator
Get the perfect coffee ratio for any brew method — pour-over, espresso, French press and more.
Golden Ratio Typography Calculator
Generate a perfect type scale, line heights and measure using φ = 1.618.
Modular Scale Calculator
Generate harmonious type and spacing scales from a base size and musical ratio.
Time Duration Between Two Dates Calculator
Find the exact duration between any two dates — in years, months, days, hours, minutes and seconds.
Time Duration Calculator
Find the hours and minutes between two times, or add a duration to a time.