📐 Math & Science
Free Math & Science Calculators
Free math calculators — percentage, area, standard deviation, quadratic formula, Ohm's Law, and more.
% Percentage Calculator
Calculate any percentage — what is X% of Y, what percent is X of Y, or find the original v...
📊 Percentage Change Calculator
Calculate percentage increase or decrease between two values. See if a change is an increa...
📐 Area Calculator
Calculate the area of rectangles, circles, triangles, and trapezoids. Free online area cal...
📏 Pythagorean Theorem Calculator
Calculate the missing side of a right triangle using the Pythagorean theorem. Solve for hy...
Ø Average and Mean Calculator
Calculate mean, median, sum, minimum, and maximum from any list of numbers. Free average a...
🔬 Scientific Calculator
Free online scientific calculator with square root, powers, logarithms, and all basic oper...
½ Fraction Simplifier
Simplify any fraction to its lowest terms. Shows the GCD, simplified fraction, and decimal...
σ Standard Deviation Calculator
Calculate population or sample standard deviation, variance, and mean from any data set. F...
x² Quadratic Formula Calculator
Solve any quadratic equation ax² + bx + c = 0 using the quadratic formula. Handles real an...
n! Factorial and Combinations Calculator
Calculate factorial (n!), permutations P(n,r), and combinations C(n,r) for any values of n...
🎲 Random Number Generator
Generate random numbers between any min and max values. Generate multiple numbers at once....
⚡ Ohm's Law Calculator
Calculate voltage, current, or resistance using Ohm's Law (V = IR). Leave one field blank ...
🧪 Density Calculator
Calculate density, mass, or volume using D = M/V. Leave one field blank to solve for it. F...