Unit Converter
Length, weight, volume & temperature · Page last updated August 2026
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How the Unit Converter Works
Pick a category, choose the unit you're converting from and to, and enter a value. For length, weight, and volume, the calculator converts your value to a common base unit and then to your target unit using standard conversion factors. Temperature uses its own formulas since Celsius, Fahrenheit, and Kelvin don't share a common zero point.
Switching category resets the From/To lists to that category's units.
Frequently Asked Questions
Which unit categories are supported?
Length, weight/mass, volume, and temperature. Each category has its own list of common metric and imperial units to convert between.
How accurate are the conversions?
Conversions use standard, widely accepted conversion factors (for example 1 inch = 2.54 cm exactly) and are shown to several decimal places for precision.
Why is temperature handled differently?
Celsius, Fahrenheit, and Kelvin use different zero points, not just a scaling factor, so they need their own conversion formulas rather than a simple multiplier.