Math Calculators
Math is the foundation every other calculator on this site stands on, so this category collects the pure-number tools in one place. Here you will find averages and rounding, percentages and percent change, statistics from mean and median to probability, geometry for areas volumes and angles, number tools for factors primes and fractions, random generators and dice, and date arithmetic for ages and business days. Each tool shows its formula in plain language, works out an example step by step, and answers the questions people actually ask, like why stacked discounts never add up or when the median beats the mean. Everything runs instantly in your browser with no sign-up: type your numbers, read the result, and adjust inputs to compare scenarios. Whether you are checking homework, settling a bet about dice odds, or splitting a bill three ways with tax and tip, the math category gives you the exact answer plus the understanding to trust it.
120 free math calculators. Every tool runs instantly in your browser with the formula shown, a worked example, and answers to common questions.
Annulus Area uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Arithmetic Seq works with pure number theory and discrete math: the exact, integer side of mathematics.
Bayes Theorem works with pure number theory and discrete math: the exact, integer side of mathematics.
Binomial Prob works with pure number theory and discrete math: the exact, integer side of mathematics.
Binomial Theorem works with pure number theory and discrete math: the exact, integer side of mathematics.
Bitwise Xor works with pure number theory and discrete math: the exact, integer side of mathematics.
Checksum Luhn works with pure number theory and discrete math: the exact, integer side of mathematics.
Chi Square works with pure number theory and discrete math: the exact, integer side of mathematics.
Circle uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Circle Through Points uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Collatz works with pure number theory and discrete math: the exact, integer side of mathematics.
Combination Repeat works with pure number theory and discrete math: the exact, integer side of mathematics.
Combinations works with pure number theory and discrete math: the exact, integer side of mathematics.
Completing Square uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Complex works with pure number theory and discrete math: the exact, integer side of mathematics.
Complex Modulus uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Confidence Interval works with pure number theory and discrete math: the exact, integer side of mathematics.
Continued Fraction converts a measurement from one unit to another using exact conversion factors.
Cubic Equation uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Digital Root works with pure number theory and discrete math: the exact, integer side of mathematics.
Distance uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Distance Formula uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Eigenvalue 2X2 uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Ellipse Area uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Ellipse Perimeter uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Euler Totient works with pure number theory and discrete math: the exact, integer side of mathematics.
Exponent works with pure number theory and discrete math: the exact, integer side of mathematics.
Exponential Prob works with pure number theory and discrete math: the exact, integer side of mathematics.
Factorial works with pure number theory and discrete math: the exact, integer side of mathematics.
Fibonacci Seq works with pure number theory and discrete math: the exact, integer side of mathematics.
Fraction converts a measurement from one unit to another using exact conversion factors.
Geometric Seq works with pure number theory and discrete math: the exact, integer side of mathematics.
Hexagon Area uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Hypergeometric works with pure number theory and discrete math: the exact, integer side of mathematics.
Icosahedron Volume uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Law Of Cosines uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Lcm Gcd works with pure number theory and discrete math: the exact, integer side of mathematics.
Linear System uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Logarithm works with pure number theory and discrete math: the exact, integer side of mathematics.
Matrix Det uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Mixture Percent works with pure number theory and discrete math: the exact, integer side of mathematics.
Modular works with pure number theory and discrete math: the exact, integer side of mathematics.
Modular Exp works with pure number theory and discrete math: the exact, integer side of mathematics.
Negative Binomial works with pure number theory and discrete math: the exact, integer side of mathematics.
Norm Dist Range works with pure number theory and discrete math: the exact, integer side of mathematics.
Normal Dist works with pure number theory and discrete math: the exact, integer side of mathematics.
Nth Root works with pure number theory and discrete math: the exact, integer side of mathematics.
Octahedron Volume uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Parallelogram Area uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Partial Fractions converts a measurement from one unit to another using exact conversion factors.
Pascal Triangle works with pure number theory and discrete math: the exact, integer side of mathematics.
Permutation works with pure number theory and discrete math: the exact, integer side of mathematics.
Permutation Repeat works with pure number theory and discrete math: the exact, integer side of mathematics.
Poisson Probability works with pure number theory and discrete math: the exact, integer side of mathematics.
Polar Rect uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Prime Factor works with pure number theory and discrete math: the exact, integer side of mathematics.
Probability Odds works with pure number theory and discrete math: the exact, integer side of mathematics.
Pyramid uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Pythagorean uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Quadratic uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Random Generator generates something unpredictable: numbers, passwords, text or codes.
Rate X Time works with pure number theory and discrete math: the exact, integer side of mathematics.
Ratio works with pure number theory and discrete math: the exact, integer side of mathematics.
Rectangular Solid uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Root works with pure number theory and discrete math: the exact, integer side of mathematics.
Scientific works with pure number theory and discrete math: the exact, integer side of mathematics.
Scientific Notation works with pure number theory and discrete math: the exact, integer side of mathematics.
Secant Tangent uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Sector Area uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Sector Perimeter uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Series Sum Ap works with pure number theory and discrete math: the exact, integer side of mathematics.
Sieve Prime works with pure number theory and discrete math: the exact, integer side of mathematics.
Sigma Notation works with pure number theory and discrete math: the exact, integer side of mathematics.
Significant Figures works with pure number theory and discrete math: the exact, integer side of mathematics.
Slope uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Slope Intercept uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Spherical Cap uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Surface Area 3D uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
T Test works with pure number theory and discrete math: the exact, integer side of mathematics.
Taylor Series works with pure number theory and discrete math: the exact, integer side of mathematics.
Trapezoid uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Triangle uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Triangular Prism uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Trigonometry works with pure number theory and discrete math: the exact, integer side of mathematics.
Vector Add uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Work Rate Together works with pure number theory and discrete math: the exact, integer side of mathematics.