Unit Converter

Convert length, weight, temperature, area, volume, speed, time and data units — free online.

About

About the Unit Converter

Converts a value between units in eight categories and shows it compared against every other unit in that category at once.

Students and DIYers use it to convert recipe or project measurements between metric and imperial without hunting down a separate calculator for each unit type, while developers use it to sanity-check byte and data-size conversions between decimal (kB, MB) and binary (KiB, MiB) units. It's one of many free converters on Toolapt, and like every tool here, it's free to use with no sign-up and no limit on how many times you run it.

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Guide

Using the Unit Converter

  1. 1

    Step 1

    Choose a category — Length, Weight, Temperature, Data, Time, Area, Volume or Speed.

  2. 2

    Step 2

    Pick the "From" and "To" units for that category.

  3. 3

    Step 3

    Enter the value you want to convert; the result updates as you type.

  4. 4

    Step 4

    Click "Swap units" to flip From and To, or scan the full comparison table below the result.

  • Covers eight categories in one tool — length, weight, temperature, data, time, area, volume and speed
  • Shows a full comparison table of the entered value against every other unit in the same category, not just the one you picked
  • Handles temperature conversion correctly (Celsius, Fahrenheit, Kelvin, Rankine), not just simple multiplication like the other categories
  • Distinguishes decimal data units (kB, MB, GB) from binary ones (KiB, MiB, GiB) rather than conflating them
  • Works entirely in your browser — no installs and no sign-up
  • Free to use, with no limit on how many times you run it
  • Fully responsive, so it works just as well on a phone as on a desktop

Students and DIYers

Students and DIYers use the Unit Converter for converting recipe quantities or project measurements between metric and imperial units without switching tools per unit type.

Developers

Developers use the Unit Converter for checking byte and data-size conversions between decimal units (kB, MB) and binary units (KiB, MiB) before writing them into code or docs.

Travelers

Travelers use the Unit Converter for converting weather in Celsius or distances in kilometers into the units they think in, and back again.

Anyone comparing measurements

Anyone comparing measurements uses the Unit Converter for seeing a value expressed in every unit of a category at once, instead of converting one pair at a time.

Examples

Unit Converter examples

4 worked examples

01

Kilometers to miles

10 km converts to 6.2137 mi, since 1 km equals 0.621371 mi.

02

Kilograms to pounds

5 kg converts to 11.0231 lb, since 1 kg equals 2.20462 lb.

03

Boiling point

100°C converts to 212°F, the boiling point of water at sea level in both scales.

04

Decimal vs binary data

1 GB converts to about 953.674 MiB, since decimal gigabytes (base 1000) are smaller than the binary mebibyte unit (base 1024) might suggest.

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FAQ

Frequently asked questions

Quick answers to common questions about the Unit Converter.

What does the Unit Converter do?

It converts a value between units within one of eight categories — length, weight, temperature, data, time, area, volume or speed — and shows the same value compared against every other unit in that category.

Is the Unit Converter free to use?

Yes. It's free, with no sign-up, no watermark and no limit on how many times you use it.

Is my input safe when I use this tool?

Yes. The value and units you choose are processed entirely on your own device — nothing is sent to a server.

Which unit categories are supported?

Length, weight, temperature, data (storage), time, area, volume and speed, each with its own set of common units to convert between.

Does it tell decimal and binary data units apart?

Yes. Kilobytes, megabytes and gigabytes (decimal, base 1000) are kept separate from kibibytes, mebibytes and gibibytes (binary, base 1024), so the conversion matches which one you actually mean.

Why does temperature work differently from the other categories?

Temperature scales don't share a common zero point, so converting between Celsius, Fahrenheit, Kelvin and Rankine uses the proper formula for each pair rather than a simple multiplication factor like the other categories use.

Can I use the Unit Converter on my phone?

Yes. The page is fully responsive and works on mobile, tablet and desktop browsers alike.

Does the Unit Converter have any limitations?

It covers the units most people need day to day. Highly specialized or historical units outside these eight categories aren't included.

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