Math calculator
Unit Converter
Convert temperature, weight, length, volume, speed, time, data, area, pressure, power, and calories.
Quick answer
How do you convert units?
Multiply by the conversion factor between the two units. For example 1 inch = 2.54 cm, so 10 in × 2.54 = 25.4 cm; 1 mile = 1.609 km, and °F = °C × 9/5 + 32.
⚡ Answer updates as you type · Enter = calculate · Esc = reset
The Unit Converter changes common weight, distance, length, and temperature values between popular units.
About this Unit Converter
Convert between common units of length, weight, temperature, volume, speed, time, area, pressure, energy, and digital storage. All conversions run instantly in your browser.
What you'll need
- • A value
- • A source unit
- • A target unit
How it works
- 1. Pick the conversion category.
- 2. Enter a value and choose source and target units.
- 3. Read the converted value, plus a quick reference table.
Worked example
100 °F = 37.78 °C; 5 miles = 8.05 km; 1 lb = 0.4536 kg.
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Unit Converter FAQ
What is the Unit Converter?
The Unit Converter is a free online tool that helps you convert temperature, weight, length, volume, speed, time, data, area, pressure, power, and calories.
How do I use the Unit Converter?
Open the Unit Converter, enter the requested values, and review the instant estimate on the page.
Is the Unit Converter free?
Yes. The Unit Converter is free to use on Fast Online Calculator and does not require an account.
What units does this converter support?
Length, weight, temperature, volume, speed, time, area, pressure, energy, power, fuel economy, and data storage.
How do I convert Fahrenheit to Celsius?
Subtract 32, then multiply by 5/9. Example: (100 − 32) × 5/9 = 37.78 °C.
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