How to convert units
Choose a category, enter a value, and pick the from and to units. The result and a table of every unit in that category update instantly, and the URL can be shared.
Metric vs imperial
Gallons and fluid ounces are US measures unless marked UK. Data units list both decimal (1 KB = 1000 bytes) and binary (1 KiB = 1024 bytes) forms.
Frequently asked questions
Why do US and UK gallons differ?
A US gallon is about 3.785 litres while an imperial (UK) gallon is about 4.546 litres, roughly 20% larger.
What's the difference between MB and MiB?
MB is 1,000,000 bytes; MiB (mebibyte) is 1,048,576 bytes. Operating systems and drive makers often use them differently, which is why a '500 GB' drive shows less capacity.
