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Data Size Converter
Convert data sizes using both the 1024 (binary) and 1000 (decimal) conventions.
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When to use it
1024 MB → 1 GB (binary)
500 MB → 0.5 GB / 500,000 KB
Compare vendor 1000-based and OS 1024-based figures
How to use it
1Step 1Fill in the values
2Step 2Change a value and the result updates instantly
3Step 3Save or copy the result
If the result looks off
The result looks wrong
Check the units and the baseline first. Changing a value updates the result instantly.
I want the starting values back
Press reset to return to the initial state.
Frequently asked questions
Why are there two answers?
Operating systems use 1024 per step while drive and network vendors use 1000, which is why a 1 TB drive shows as 931 GB.
Why do the two answers differ?
Operating systems use 1024 per step and storage vendors use 1000, which is why a 1 TB drive reports 931 GB.