Math calculators that show their working
Percentages, fractions, decimals, ratios and averages — each calculator gives the answer and every step in between, written the way your teacher wants to see it.
Quick percentage
What is % of ?
20% = 0.2, and 0.2 × 45 = 9
More percentage questions, with full steps →Pick a calculator
Percentages
Percent of, change, discounts, error
Fractions
Add, subtract, multiply, divide, simplify
Conversions
Decimals, fractions and percents
Number skills
Ratios, averages, LCM, roots, powers
Stuck on a word problem?
Paste it in. The helper works out which kind of problem it is, sets it up, and solves it step by step — then points you to the calculator that checks the arithmetic.
It answers math questions only, and it’s there to help you learn the method. Your teacher will still want to see your own working.
Understand it, don’t just copy it
Why the steps matter
Getting an answer is easy — any phone calculator can do 0.15 × 80. What homework actually tests is whether you can set the problem up: which number goes on the bottom, when you need a common denominator, why a 20% discount and a 20% increase don’t cancel out. That is what the numbered steps are for.
Use a calculator to check your own working: do the problem on paper first, then compare your steps line by line. Where they split apart is exactly the idea to revise. Every calculator here runs in your browser, so answers appear as you type and nothing you enter is sent anywhere.