Math and study tools
Five tools for homework, study and quick math. Type your numbers and see the answer straight away.
- Scientific CalculatorSin, cos, tan, logs, powers, roots and brackets.
- Statistics CalculatorMean, median, mode and standard deviation.
- Number Base ConverterBinary, octal, decimal, hex and bases up to 36.
- Roman Numeral ConverterNumbers to Roman numerals and back.
- Number to Words ConverterNumbers to words, cheque amounts, lakh and crore.
These tools cover the calculations that come up in school, college and work: a full scientific calculator, the main statistics of a list of numbers, and converters for number bases, Roman numerals and amounts written in words.
Everything is worked out in your browser, so nothing you type is sent anywhere. Each page explains the formula behind the answer, with a worked example you can check by hand.
Which tool should I use?
- Need more than a basic calculator? Scientific Calculator. Trigonometry, logs, powers, roots and brackets, with degrees or radians.
- Have a list of numbers to summarize? Statistics Calculator. Mean, median, mode, range, standard deviation and quartiles.
- Working with binary, hex or octal? Number Base Converter. Convert between any bases from 2 to 36, including very large numbers.
- Reading or writing Roman numerals? Roman Numeral Converter. Numbers to Roman numerals and back, with a breakdown.
- Writing an amount on a cheque? Number to Words Converter. Numbers and money in words, with lakh and crore or million and billion.