100% in-browser
Math Tools
Free online math calculators that run in your browser — percentages, mean and statistics, GCD and LCM, primes and factorials, quadratic equations, geometry, trigonometry and more, with instant results.
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Percentage Calculator
Work out percentages: what is X% of Y, X as a percent of Y, and percent change.
x̄Mean, Median & Mode
Compute count, sum, mean, median, mode, min and max of a list of numbers.
÷GCD & LCM Calculator
Find the greatest common divisor and least common multiple of a list of integers.
PPrime Checker & Factorizer
Check whether a number is prime and show its prime factorization.
!Factorial Calculator
Compute n! exactly for large n using big integers, with a digit count.
φFibonacci Sequence
Generate the first N Fibonacci numbers exactly using big integers.
x²Quadratic Equation Solver
Solve ax² + bx + c = 0 with discriminant, real or complex roots and the vertex.
△Right Triangle Calculator
Solve a right triangle from two known sides using the Pythagorean theorem.
σStatistics Calculator
Compute mean, median, variance, standard deviation, range and more from a list.
⊞Aspect Ratio Calculator
Simplify a width:height ratio and scale dimensions while keeping the ratio.
$Tip Calculator
Calculate the tip, the total and the per-person share when splitting a bill.
⚕BMI Calculator
Calculate your Body Mass Index and category in metric or imperial units.
√Scientific Calculator
Evaluate math expressions with functions and constants like sin, ln, sqrt, pi and e.
nPrPermutations & Combinations
Compute permutations (nPr) and combinations (nCr) of n items taken r at a time.
⊟Matrix Calculator
Add, multiply and find the determinant of small 2×2 or 3×3 matrices.
xⁿPower & Root Calculator
Compute powers, nth roots and logarithms with three live mini calculators.
↦Distance Between Points
Compute Euclidean and Manhattan distance, midpoint and slope between two 2D points.
▱Area & Perimeter Calculator
Calculate the area and perimeter of rectangles, triangles, circles and trapezoids.
ℕ?Number Properties
Inspect a number: even/odd, sign, prime, factors, prime factorization, digit sum and more.
modModulo Calculator
Compute a mod n: the JS remainder, the always-positive modulo, the quotient and divisibility.
◯Circle Calculator
Solve a circle from any one measurement: radius, diameter, circumference or area.
◳Volume Calculator
Compute the volume and surface area of a cube, sphere, cylinder, cone or box.
△°Triangle Solver
Solve any triangle from SSS, SAS, ASA or AAS using the law of sines and cosines.
sinTrigonometry Calculator
Find sine, cosine and tangent of an angle, plus the inverse functions asin, acos and atan.
⬡Polygon Area Calculator
Compute the area and perimeter of any polygon from its vertex coordinates.
≈Rounding Calculator
Round a number up, down, to decimal places or to the nearest multiple.
a:bProportion Solver
Solve the proportion a/b = c/d for the one value you leave blank.
±%Percent Error Calculator
Compute percent error, percent difference and percent change with three live calculators.