Converters Tools

Convert units of length, weight, temperature, data and more.

Data Size Converter

Convert between bytes, KB, MB, GB and TB.

Length Converter

Convert metres, feet, miles, inches and more.

Weight Converter

Convert kilograms, pounds, ounces and grams.

Temperature Converter

Convert Celsius, Fahrenheit and Kelvin.

Speed Converter

Convert km/h, mph, m/s and knots.

Convert square metres, acres, hectares and more.

Volume Converter

Convert litres, gallons, cups and millilitres.

Convert seconds, minutes, hours, days and weeks.

Number to Words

Convert numbers into written words.

Roman Numeral Converter

Convert between numbers and Roman numerals.

Frequently asked questions about Converters tools

Are these Converters tools free?

Yes — every Converters tool on OmniTools is 100% free with no watermarks, no limits and no account required.

Do I need to sign up or install anything?

No. All 10 Converters tools run in your browser — nothing to download, install or register for.

Are my files and data private?

Most tools process your data entirely on-device in your browser, so nothing is uploaded. Where a file must be processed on the server, it is sent over HTTPS and deleted right after.

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