Unit Converter
Length, weight, temperature, volume, speed and area — pick a category and convert instantly.
About this unit converter
This tool covers the six unit categories people convert most often: length (metric and imperial), weight, temperature, volume (including US cooking measures like tablespoons and cups), speed and area. Pick a category, type a value on either side, and the other side updates instantly — no "convert" button, no page reload.
Why temperature works differently
Length, weight, volume, speed and area conversions are all simple multiplication: multiply by a fixed factor to move between units. Temperature is different because Celsius, Fahrenheit and Kelvin don't share a zero point — converting requires an offset (like °F = °C × 9/5 + 32), which this tool handles automatically.
Common conversions people search for
Some of the most common pairs — centimeters to inches, kilograms to pounds, Celsius to Fahrenheit, liters to gallons, kilometers to miles — are all available by switching the "to" unit within the relevant category above.
Frequently asked questions
How accurate are these conversions?
Conversions use standard internationally accepted conversion factors (SI and US customary) and full floating-point precision, then round for display. They are accurate for everyday, cooking, DIY and academic use.
Why is temperature handled differently?
Celsius, Fahrenheit and Kelvin scales don't share a common zero point, so temperature conversion uses an offset formula instead of the simple multiplication factor used by other categories.
Can I convert between categories, like weight to volume?
No — weight and volume are different physical quantities and their relationship depends on the density of the substance, which this tool doesn't assume. Pick the category that matches what you're converting.
Does this tool work offline?
Yes. All conversion tables are built into the page — once loaded, no internet connection is needed to keep converting.