File Size Calculator
Quick answer
Enter a size in one unit—see equivalent KB/MB/GB with clear labeling of which convention is used.
For a related estimate, see Typography Scale Calculator.
Explore further: Css Unit Converter · Font Pairing Tool
Why 1000 vs 1024
Storage vendors often use decimal GB; OS dialogs may show binary GiB. Mismatch causes “missing” gigabytes on new drives.
Explore further: Pixel Ruler Overlay · Grid Overlay Tool
File sizes are stored in bytes; humans label KB/MB/GB using either 1024-based (binary) or 1000-based (SI) steps. Use it when you are estimating upload time, CDN bills, or comparing OS vs marketing numbers.
How to use this calculator
- Open the tool: Enter the byte count or a human-readable size.
- Tune inputs: Pick whether you want SI (1000) or binary (1024) steps.
- Read the output: Copy the converted values into limits or spreadsheets.
Real-world examples
- Upload cap: A 25MB limit might be 25×1000×1000 bytes—verify API docs for exact bytes.
- Video bitrate: Size ≈ rate × time only when codecs and containers match your assumptions.
Explore further: Accessible Color Palette
Tips & gotchas
Always read API limits in bytes when available—human labels are where teams miscommunicate.
FAQ
What about bits vs bytes?
Networks often quote bits per second—divide by 8 for bytes per second.
Does this tool send my text to a server?
Calciverse runs in your browser; we do not store your inputs on our servers for these utilities. Anything that uses network APIs (for example DNS lookup) only sends what you explicitly request.
Why do results differ from another site?
Rounding, defaults, and implementation details (color spaces, tokenizers, DNS resolvers) can differ. Compare definitions, not just the headline number.