Math Calculators
Free math calculators that solve percentages, fractions, equations and statistics step by step — showing the working, not just the answer.
Every calculator shows the intermediate steps: which formula is applied, what each symbol means, and how the numbers move through it. Students use them to check homework, teachers to build examples, and professionals for quick statistics on real datasets — paste up to hundreds of values into the average or standard-deviation tools and get mean, median, mode and spread at once.
Percentage Calculator
Calculate percentages easily.
Fraction Calculator
Add, subtract, multiply fractions.
Scientific Calculator
Advanced mathematical functions.
Average Calculator
Find mean, median, and mode.
Equation Solver
Solve linear and quadratic equations.
Standard Deviation
Calculate standard deviation.
GCD Calculator
Find the Greatest Common Divisor of two numbers.
LCM Calculator
Find the Least Common Multiple of two numbers.
How to use these calculators
Concrete walkthroughs with real numbers — open the tool, follow the steps.
Percentages without mistakes
'What is 15% of 240?' → Percentage Calculator: 240 × 0.15 = 36. The reverse ('36 is what % of 240?') is 36 ÷ 240 = 15%. Both directions are handled — including percent increase/decrease with the sign shown.
Solve for x in one line
The Equation Solver handles linear (3x + 5 = 20 → x = 5) and quadratic equations, and shows the discriminant when there are two roots. Type the equation as you'd write it on paper.
Read a dataset in seconds
Paste your numbers into the Average Calculator: it returns mean, median and mode together. When mean and median differ a lot, your data has outliers — check the Standard Deviation calculator next to quantify the spread.