Converters

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Length Converter

Convert cm to inches, feet to meters, km to miles and more — instantly.

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Weight Converter

Convert kg to lbs, grams to ounces, stones to kg and more.

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Temperature Converter

Convert Celsius to Fahrenheit and Kelvin — weather, cooking and science.

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Volume Converter

Convert liters to gallons, ml to cups, quarts, pints and cubic feet.

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Time Converter

Convert hours to minutes, days to hours, weeks, months and years.

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Data Size Converter

Convert MB to GB, GB to TB, bits and bytes — KB vs KiB explained.

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Number System Converter

Convert binary, octal, decimal, hex and ASCII text — all at once.

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Number to Words Converter

Write numbers in words for cheques and documents — and words back to numbers.

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Percent to Decimal Converter

Convert percent to decimal and fraction — all three forms at once.

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Letter to Number Converter

Convert letters to numbers (A=1, B=2… Z=26) and back — A1Z26 cipher.

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Roman Numerals Converter

Convert numbers to Roman numerals and Roman numerals back to numbers (1–3999).

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Currency Converter

Convert between world currencies with live exchange rates — free, no sign-up.