Convert length, weight, temperature, volume, area, speed and data units instantly.
All conversions happen offline in your browser.
How do you convert between units of measurement?
Most units convert through a common base unit: the value is multiplied by its factor to the base, then divided by the target factor. Temperature uses dedicated formulas, for example °F = °C × 9/5 + 32. Conversions are exact where defined exactly, such as 1 inch = 2.54 cm. For example, 1 kilogram = 2.2046 pounds and 25 °C = 77 °F.
Understanding your result
Conversions are exact where the relationship is defined exactly (such as 1 inch = 2.54 cm) and rounded sensibly for display. Switching the from and to units reverses the conversion.
Formula and method
Most units convert through a common base unit: the value is multiplied by its factor to the base, then divided by the target factor. Temperature uses dedicated formulas, for example °F = °C × 9/5 + 32.
Assumptions and limitations
Results are rounded for display, so very high-precision work should keep more decimal places than shown. Conversions cover only defined physical units within the same category and cannot handle currency, custom trade units or context-specific measures. Always confirm figures where an exact value is critical.
Worked example
1 kilogram = 2.2046 pounds. 100 km/h = 62.137 mph. 25 °C = 77 °F.
How to use this tool
- Pick the measurement type, such as length or weight.
- Enter your value and choose the from and to units.
- The converted result appears instantly as you type.
Common mistakes to avoid
- Converting between different measurement types, such as length to weight.
- Confusing metric tonnes with imperial tons.
About the Unit Converter
The Unit Converter turns any measurement into another unit within the same category — convert kilograms to pounds, centimetres to inches, Celsius to Fahrenheit and many more, all instantly.
Who should use this tool
Students, travellers, cooks, tradespeople, engineers and anyone who regularly meets a measurement in unfamiliar units and needs it converted accurately.
Benefits
- Covers length, weight, temperature, volume, area, speed and digital storage.
- Uses internationally defined factors, so results are accurate.
- Converts as you type — no button press needed.
- Works entirely offline in your browser.
Practical use cases
- Converting recipe amounts between metric and imperial.
- Reading travel distances, speeds and temperatures abroad.
- Checking measurements for study, DIY or engineering work.
Explore all Unit Converters tools
Frequently asked questions
How many units are supported?
Seven categories cover dozens of everyday units across length, weight, temperature, volume, area, speed and digital storage.
Are the conversions accurate?
Yes. Standard internationally defined factors are used, with results rounded for readability.
Can I convert between different categories, such as weight to volume?
No. The tool only converts within a single category, because units like kilograms and litres measure different quantities. Converting weight to volume would require knowing the substance's density, which this general converter does not use, so each category stays separate.