Unit Converter
Convert length, mass, temperature, volume, area, speed, data size, and time units exactly.
Browser onlyYour data never leaves this device.
Runs entirely in your browser. The values you type are never sent or stored.
Details: Privacy policy
Input
Decimals and a comma separator are both accepted.
Result
- Metre to Foot
- 3.280839895ft1 m = 3.280839895 ft
- Base unit
- 1meterThe category base, so you can check the conversion against a reference.
All length units
| Unit | Symbol | Value |
|---|---|---|
| Millimetre | mm | 1,000 |
| Centimetre | cm | 100 |
| Metre | m | 1 |
| Kilometre | km | 0.001 |
| Inch | in | 39.37007874 |
| Foot | ft | 3.280839895 |
| Yard | yd | 1.093613298 |
| Mile | mi | 0.0006213711922 |
| Nautical mile | nmi | 0.0005399568035 |
Unit Converter changes a value from one unit to another inside eight categories: length, mass, temperature, volume, area, speed, data size and time. Each ordinary unit is stored as an exact factor to its category base, so a conversion is a multiplication and a division rather than a chain of rounded steps. Temperature is the exception: Celsius, Fahrenheit and Kelvin have offsets as well as scale differences, so it is handled by dedicated formulas instead of a factor. The page shows the full table for the chosen category, which makes a suspicious result easy to check against a neighbouring unit. Data sizes spell out decimal and binary units separately, because a megabyte and a mebibyte are not the same number and pretending otherwise causes real upload failures. Everything is computed locally with no request, no rounding to a hidden precision, and no remembered input.
How to use Unit Converter
- Choose the measurement category.
- Enter the value and pick the source and target units.
- Read the converted value, or copy it and the full table.
What you get
- The converted value with its unit symbol.
- The same value expressed in the category base unit.
- A complete table of every unit in the category for the entered value.
When to use Unit Converter
- Convert kilometres to miles before a trip or a running plan.
- Turn kilograms into pounds for a recipe or a shipping label.
- Check a Celsius temperature against Fahrenheit and Kelvin.
- Convert a file size from MiB to MB to see why an upload limit rejected it.
Frequently asked questions about Unit Converter
Are the conversion factors exact?
The factors follow their legal or defined values, such as 1 inch = 0.0254 metres and 1 pound = 0.45359237 kilograms. Displayed results are rounded for reading, not for storage.
Why is temperature handled differently?
Celsius and Fahrenheit scales start at different zero points, so converting them needs an offset as well as a multiplier. A single factor would give the wrong answer.
What is the difference between MB and MiB?
MB is a decimal megabyte (1,000,000 bytes), while MiB is a binary mebibyte (1,048,576 bytes). The converter lists both so an upload limit is not misread.
Does the converter store my values?
No. The calculation runs in the browser and the page keeps nothing after you leave it.
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