Math & Science
Percentage, standard deviation, quadratic formula, geometry, statistics, and 25+ math tools.
Calculators
Average Calculator — Mean, Median & Mode
Calculate the mean, median, and mode of a set of numbers. Free online average calculator — enter your numbers and get instant statistical results.
Open calculatorCircle Calculator — Area, Circumference & Diameter
Calculate the area and circumference of a circle from radius or diameter. Free circle calculator with instant results.
Open calculatorCombination Calculator — nCr
Calculate the number of combinations (unordered selections) of r items chosen from n items. Free nCr combination calculator.
Open calculatorCube Root Calculator — ∛n
Calculate the cube root of any number instantly. Supports positive and negative numbers. Free cube root calculator with step-by-step explanation.
Open calculatorCylinder Volume Calculator
Calculate the volume and surface area of a cylinder from radius and height. Free cylinder volume calculator using V = πr²h.
Open calculatorExponent Calculator — Calculate Powers
Calculate any number raised to any power (bⁿ). Supports negative exponents and decimal bases. Free exponent and power calculator.
Open calculatorFactorial Calculator — n!
Calculate the factorial of any non-negative integer (n!). Supports values from 0! to 20!. Free factorial calculator.
Open calculatorFibonacci Calculator — Nth Fibonacci Number
Calculate any Fibonacci number by position. Find F(n) instantly for any n from 1 to 70. Free Fibonacci sequence calculator with formula explanation.
Open calculatorFraction Calculator — Add, Subtract, Multiply & Divide Fractions
Add, subtract, multiply, or divide fractions instantly. Simplify fractions and convert between mixed numbers and improper fractions. Free fraction calculator.
Open calculatorGCF Calculator — Greatest Common Factor
Calculate the Greatest Common Factor (GCF) or Greatest Common Divisor (GCD) of two numbers. Free GCF calculator using the Euclidean algorithm.
Open calculatorGPA Calculator — Calculate Your Grade Point Average
Calculate your GPA from your course grades and credit hours. Supports letter grades and 4.0 scale. Free GPA calculator for high school and college students.
Open calculatorHalf-Life Calculator
Calculate radioactive decay and remaining amount using the half-life formula. Enter initial amount, half-life, and elapsed time. Free half-life calculator.
Open calculatorKinetic Energy Calculator
Calculate kinetic energy from mass and velocity using KE = ½mv². Supports kg/m/s and lbs/mph units. Free kinetic energy calculator for physics.
Open calculatorLCM Calculator — Least Common Multiple
Calculate the Least Common Multiple (LCM) of two numbers instantly. Free LCM calculator using the GCD method.
Open calculatorLogarithm Calculator — Log, Ln, Log Base N
Calculate logarithms: log base 10, natural log (ln), log base 2, or any custom base. Free logarithm calculator.
Open calculatorOhm's Law Calculator — Voltage, Current & Resistance
Calculate voltage, current, resistance, or power using Ohm's Law. Enter any two values and solve for the third. Free Ohm's Law calculator for electronics.
Open calculatorPercent Error Calculator
Calculate percent error between an experimental value and the true value. Used in science and lab experiments. Free percent error calculator.
Open calculatorPercentage Change Calculator
Calculate the percentage change between two values instantly. Find % increase or decrease between old and new values. Free online percentage change calculator.
Open calculatorPercentage Calculator — Find Any Percentage Instantly
Calculate percentages instantly — find what percent one number is of another, percentage increase or decrease, and more. Free percentage calculator.
Open calculatorPermutation Calculator — nPr
Calculate the number of permutations (ordered arrangements) of r items chosen from n items. Free nPr permutation calculator.
Open calculatorPrime Factor Calculator — Smallest Prime Factor
Find the smallest prime factor of any number. If the result equals the input, the number is prime. Free prime factor calculator.
Open calculatorProbability Calculator
Calculate the probability of an event occurring given the number of favourable outcomes and total outcomes. Free probability calculator.
Open calculatorPythagorean Theorem Calculator
Calculate the hypotenuse or missing side of a right triangle using the Pythagorean theorem (a² + b² = c²). Free Pythagorean theorem calculator.
Open calculatorQuadratic Formula Calculator
Solve any quadratic equation ax² + bx + c = 0 using the quadratic formula. Returns both real roots. Free quadratic formula calculator.
Open calculatorRatio Calculator — Simplify & Solve Ratios
Simplify ratios to their lowest terms or solve for a missing value in a proportion. Free ratio and proportion calculator.
Open calculatorRectangle Calculator — Area & Perimeter
Calculate the area, perimeter, and diagonal of a rectangle from its length and width. Free rectangle calculator.
Open calculatorRule of Three Calculator — Proportional Calculation
Solve proportional problems instantly. If A is to B as C is to X, find X using the rule of three. Free proportion calculator for math and everyday use.
Open calculatorScientific Calculator — Free Online Calculator
Free online scientific calculator with trigonometry, logarithms, powers, and more. Use for math, physics, engineering, and science calculations.
Open calculatorSphere Volume Calculator
Calculate the volume and surface area of a sphere from its radius. Free sphere volume calculator using the formula 4/3πr³.
Open calculatorSquare Root Calculator — Free & Instant
Calculate square roots, cube roots, and nth roots instantly. Free square root calculator shows exact results and decimal approximations.
Open calculatorStandard Deviation Calculator
Calculate the population standard deviation and variance for a set of 5 numbers. Free standard deviation calculator with step-by-step method.
Open calculatorTriangle Area Calculator
Calculate the area of a triangle using base and height, or all three sides using Heron's formula. Free triangle area calculator.
Open calculatorVariance Calculator
Calculate the population variance of up to 5 numbers. Free variance calculator — shows variance and standard deviation.
Open calculatorWeighted Average Calculator
Calculate the weighted average of any set of values and weights. Ideal for GPA, grades, and financial calculations. Free weighted average calculator.
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