File Size Calculator
Convert between bytes, KB, MB, GB and TB — or see any uploaded file's exact size.
Drop files here or click to browse
Your files never leave this device
How to use the File Size Calculator
- Type a size and pick units
- Result updates instantly — or drop a file to read its size
Features
- ✅ Two-way unit conversion
- ✅ Exact binary (1024) math
- ✅ Drop a file to see its size
- ✅ Local
FAQ
KB = 1000 or 1024 bytes?
We use the binary standard: 1 KB = 1024 bytes, like operating systems.