Unit Converter
Convert between length, weight, temperature, volume and speed units, including metric, US and imperial.
Everything is converted entirely in your browser. Nothing is sent to a server.
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How to use this tool
- 1Choose a category: length, weight, temperature, volume or speed.
- 2Enter a value and choose the units to convert from and to.
- 3The result updates automatically. Use the swap button to reverse the conversion.
Features
- Length, weight, temperature, volume and speed conversions, including metric, US and imperial units.
- Kitchen units (cups, tablespoons, teaspoons) and both US and UK gallons.
- Instant results as you type.
- One-click unit swap.
- No account or sign-up required.
Privacy
Your values are converted entirely in your browser. Nothing is sent to a server.
Frequently asked questions
Is this unit converter free?
Yes, and there is no limit on how many times you can use it.
How accurate are the conversions?
Conversions use standard conversion factors (e.g. 1 inch = 2.54cm exactly) and are shown rounded to 6 decimal places.
Can I convert between different categories, like length to weight?
No — units only convert within the same category (length, weight, temperature, volume or speed), since converting between them is not physically meaningful.
Is my data sent to a server?
No. All conversions happen locally in your browser.
Popular conversions
- CM to Inches
- Inches to CM
- Feet to Meters
- Meters to Feet
- KM to Miles
- Miles to KM
- MM to Inches
- Inches to MM
- Feet to CM
- CM to Feet
- Yards to Meters
- Meters to Yards
- KG to LBS
- LBS to KG
- Grams to Ounces
- Ounces to Grams
- Celsius to Fahrenheit
- Fahrenheit to Celsius
- Celsius to Kelvin
- Kelvin to Celsius
- Liters to Gallons
- Gallons to Liters
- ML to OZ
- OZ to ML
- Cups to ML
- ML to Cups
- KM/H to MPH
- MPH to KM/H
Guides
- Holiday Baking Conversions: Cups to ML, °F to °C and More
Baking a recipe from another country this holiday season? Convert cups, sticks of butter, ounces and oven temperatures correctly — with a handy chart.
- How to Convert Kilograms to Pounds (and Pounds to Kilograms)
1 kg = 2.20462 lb. Learn the exact kg-to-lbs formula, a quick mental trick, and a chart for body weight, luggage limits and gym plates.
- How to Convert Celsius to Fahrenheit (and Back)
The exact formula for converting °C to °F and °F to °C, a quick mental shortcut, and a handy chart of everyday temperatures for weather, cooking and fever.
- Everyday Unit Conversions Made Simple
From cooking in a different measurement system to converting kilometers to miles, here's a quick guide to the unit conversions people actually need.