Free maths calculators for quick, accurate answers. Work out a discount, a percentage increase or the difference between two numbers, simplify ratios, turn fractions into decimals, compare unit prices and run statistics tests, with the working shown so you can follow every step.
In This Guide
Quick picks
Not sure where to start? These are the tools people use most in this category.
| I want to | Use this tool |
|---|---|
| Price after a discount | Discount Calculator |
| Percentage increase | Percentage Increase Calculator |
| Difference between two numbers | Percentage Difference Calculator |
| Simplify a ratio | Ratio Calculator |
Percentages and money maths
4Sales, price rises and best value.
Numbers and ratios
4Everyday arithmetic made quick.
Algebra
1Solve equations step by step with graphs.
Home and DIY maths
1Measure and cost home projects.
Frequently asked questions
How do I work out a percentage increase?
Subtract the old value from the new value, divide by the old value and multiply by 100. The calculator does this and shows each step.
What is the difference between percentage change and percentage difference?
Percentage change compares a new value with an original one. Percentage difference compares two values without treating either as the starting point.
Do the calculators show working?
Yes. Most maths tools show the formula and steps so you can check the answer or use it for homework.
Can I use them on my phone?
Yes. Every calculator works on phones, tablets and computers.
How we build and check these tools
Every tool is built by hand by the Tools Veria Editorial Team, tested with worked examples and checked against official guidance. Read our editorial policy to see how we review figures when rules change. Key sources for this category:
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Browse all tools or read our practical guides.