Unit Converter
Convert between units across 10 categories — length, weight, temperature and more — instantly.
Runs in your browser. Nothing is uploaded.Common conversions
Unit Converter in 3 steps
Pick a category
Choose length, weight, temperature or one of 7 other unit categories.
Type a value
Enter a number in either box — the other updates instantly as you type.
Swap or browse common conversions
Use the swap button to flip direction, or check the quick-reference list below for popular conversions in that category.
Why use this Unit Converter
Questions about this tool
How accurate are the conversions?
Conversions use standard, internationally recognized conversion factors (e.g. exactly 25.4mm per inch), so results are precise to the decimal places shown.
Why does temperature work differently from the other categories?
Temperature scales (Celsius, Fahrenheit, Kelvin) don't share a common zero point or simple multiplier the way length or weight units do, so they use their own conversion formulas instead of a shared base unit.
Can I convert between categories, like length to weight?
No — unit conversion only makes sense within a category, since length and weight measure fundamentally different things. Pick the category matching what you're converting first.
What does the "digital storage" category cover?
It converts between bits, bytes, kilobytes, megabytes, gigabytes and terabytes, using the standard 1024-based (binary) convention common in computing.