Math Calculators
Solve percentages, fractions, prime numbers, factorials, quadratic equations, statistics, geometry and basic physics. Every calculator explains the formula it uses, so students can check homework and learn the method at the same time.
Percentage Calculator
Work out percentages, percentage change and increases or decreases.
Percentage Error Calculator
Find how far a measured value is from the true value, as a percentage.
Fraction to Decimal Converter
Convert fractions to decimals and decimals to simplest fractions.
Scientific Notation Converter
Write very large or very small numbers in scientific notation.
Number Base Converter
Convert numbers between binary, octal, decimal, hex and other bases.
Number to Words Converter
Write any amount in words, in lakh-crore or million-billion style.
Roman Numeral Converter
Convert numbers to Roman numerals (I, V, X…) and back.
Prime Number Checker
Check if a number is prime and list primes in any range.
Prime Factorization Calculator
Break a number into prime factors and list all of its divisors.
Factorial, Permutation & Combination Calculator
Calculate n! exactly, plus permutations (nPr) and combinations (nCr).
Fibonacci Sequence Generator
List Fibonacci numbers, find the nth term and test any number.
GCD and LCM Calculator
Find the HCF/GCD and LCM of two or more numbers with steps.
Quadratic Equation Solver
Solve ax² + bx + c = 0 with steps, roots and a graph.
Statistics Calculator
Get mean, median, mode, standard deviation and more for a list of numbers.
Area and Volume Calculator
Find area, perimeter, volume and surface area of common shapes.
Physics Formula Calculator
Solve force, work, power, energy, momentum, density and Ohm's law.