Unit Converter
Convert between length, weight, volume, area, and speed units instantly.
How to use Unit Converter
- Choose a category: length, weight, volume, area, or speed.
- Select the unit you're converting from and the unit you're converting to.
- Enter a value — the converted result updates instantly.
- Use the swap button to reverse the conversion direction.
About this tool
The Unit Converter handles the most common everyday conversions — length, weight/mass, volume, area, and speed — across metric, imperial, and US customary units. Pick a category, choose your units, and the result updates as you type. All calculations run instantly in your browser — nothing is uploaded or sent to a server. For temperature (which uses formulas rather than a simple ratio), use the dedicated Temperature Converter.
Frequently Asked Questions
How accurate are the conversions?
Conversions use standard internationally recognized conversion factors (e.g. 1 inch = 2.54 cm exactly) and display results to a reasonable number of decimal places for everyday use.
Can I convert temperature here?
Temperature isn't included in this tool because it uses formulas rather than a simple multiplier — use the dedicated Temperature Converter instead.
Which unit systems are supported?
Metric (meters, kilograms, liters), imperial (feet, stone, gallons), and US customary units (US gallons, US tons) are all included, organized by category.