Math & Percentage Calculators
Free online math calculators for fractions, ratios, percentages, square roots, exponents, and rounding. Instant results for students, professionals, and everyday math.
6 Calculators
Percentage Calculator
Free percentage calculator for X% of Y, percent change, increase, decrease, and reverse percentag...
MathFraction Calculator
Free fraction calculator to add, subtract, multiply, and divide fractions — auto-simplifies to lo...
MathRatio Calculator
Free ratio calculator to simplify ratios and solve proportions — find missing values with cross-m...
MathSquare Root Calculator
Free square root calculator — find √n for any number, detect perfect squares, and see exact or de...
MathExponent Calculator
Free exponent calculator — compute base raised to any power including negative and decimal expone...
MathRounding Calculator
Free rounding calculator — round, floor, ceil, or truncate any number to 0–10 decimal places inst...
MathFree math calculators for everyday problems — from homework and exam prep to recipes, business pricing, and quick mental-math checks. Every tool runs instantly in your browser with no account required.
Calculators in This Category
- Percentage Calculator — Calculate X% of Y, percentage change, increase, and decrease
- Fraction Calculator — Add, subtract, multiply, and divide fractions with auto-simplification
- Ratio Calculator — Simplify ratios and solve proportion problems
- Square Root Calculator — Find √n with perfect-square detection
- Exponent Calculator — Compute base raised to any power
- Rounding Calculator — Round to decimal places with floor, ceil, or truncate modes
Related Tools
Need statistics? Try our Mean Median Mode Calculator or Standard Deviation Calculator. For business math, see Markup and Profit Margin calculators. For advanced functions, use the Scientific Calculator.
Frequently Asked Questions
What free math calculators are available?
Our math section includes a Percentage Calculator, Fraction Calculator, Ratio Calculator, Square Root Calculator, Exponent Calculator, and Rounding Calculator — all free with no signup.
Which calculator should I use for homework?
Use the Fraction Calculator for adding and simplifying fractions, the Ratio Calculator for proportions, the Percentage Calculator for percent problems, and the Square Root or Exponent Calculator for powers and roots. For advanced functions, try our Scientific Calculator.
Do these math calculators work on mobile?
Yes. All calculators are mobile-friendly, run in your browser, and work offline when installed as a PWA. Results update instantly as you type.
Are the results accurate?
Yes. Calculations use standard mathematical formulas and run client-side in your browser. Fractions are simplified using GCD; ratios use cross-multiplication; roots and powers use IEEE floating-point arithmetic with up to 6 decimal places shown.
Can I convert between fractions and percentages?
Yes. Use the Fraction Calculator to get a decimal, then the Percentage Calculator to convert to a percent — or divide the numerator by the denominator and multiply by 100.