Math tools
Math calculators
Everyday math without the clutter — percentages, fractions, ratios, averages and powers, all in one place.
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PopularBasic Calculator
Add, subtract, multiply, divide.
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Scientific Calculator
Trig, logs, powers — the full toolkit.
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PopularPercentage Calculator
What's X% of Y, instantly.
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Percent Change Calculator
Increase or decrease, in percent.
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Fraction Calculator
Add, subtract, multiply, divide fractions.
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Average Calculator
Mean, median, sum — paste any list.
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Ratio Calculator
Solve and simplify ratios in seconds.
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Square Root Calculator
√ for any number, plus powers.
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Random Number Generator
Pick a random number in any range.
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Rounding Calculator
Round to any decimal or step.
Most used in Math
Common tasks
- Find what % one number is of another
- Add or simplify fractions and mixed numbers
- Average a list of numbers (mean and median)
- Solve or simplify a ratio
- Round to a chosen decimal place or step
All Math calculators
- Basic Calculatorcalculator
- Scientific Calculatorsin 30
- Percentage Calculatorwhat is 20% of 150
- Percent Change Calculatorpercent increase from 100 to 125
- Fraction Calculator1/2 + 1/3
- Average Calculatoraverage of 5 numbers
- Ratio Calculator3:4 = 9:?
- Square Root Calculatorsquare root of 144
- Random Number Generatorrandom number 1 to 10
- Rounding Calculatorround 3.14159 to 2dp
Frequently asked
Which calculator should I pick for percentages?
Use Percentage Calculator for 'what is X% of Y' style questions and Percent Change for growth/decline between two values.
Do these handle decimals and negatives?
Yes — every math calculator accepts decimal and negative numbers and rounds sensibly for display.
Is the Scientific Calculator full-featured?
It covers trig, logs, powers, roots and factorials. For order-of-operations precision, prefer Scientific over Basic.
Can I trust the answers?
All math runs in your browser using JavaScript IEEE-754 numbers, with rounding applied only at display time.