Unit converters
Convert length, weight, area, volume, temperature and pressure in your browser.
Length Converter
Convert inches to centimeters, feet to meters, and miles to kilometers. Swap units, use common presets, and copy the result without signing in.
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Weight Converter
Convert pounds to kilograms, ounces to grams, and metric tonnes to kilograms. Includes clearly labeled Taiwanese units and a copyable result.
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Area Converter
Convert square feet to square meters, acres to hectares, and other area units. Check property and land measurements with worked examples.
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Volume Converter
Convert US cups to milliliters, gallons to liters, and cubic meters to liters. US customary, Imperial and metric cup definitions are labeled separately.
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Temperature Converter
Convert Fahrenheit to Celsius and Kelvin with instant results, common temperature presets, and checks against values below absolute zero.
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Pressure Converter
Convert PSI, bar, kPa, kgf/cm² and atmospheres instantly. Compare pressure units on gauges, tires and equipment without changing the pressure reference.
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Each converter handles one kind of quantity. Check regional definitions for cups and gallons, and distinguish weight ounces from fluid ounces.
- Length, area and volume use different conversion factors.
- Volume cannot be converted to mass without density.
- Use the conversion guide if you are unsure which kind of quantity a unit represents.
| Task | Start with | Why |
|---|---|---|
| Compare product dimensions | Length Converter | Convert inches, feet, centimeters and meters. |
| Check a shipping weight | Weight Converter | Convert pounds, kilograms, ounces and grams. |
| Check a liquid measure | Volume Converter | Distinguish US, Imperial and metric measures. |
| Identify an unfamiliar unit | Conversion Guide | Choose a converter by the quantity it measures. |