File Size Converter
Convert file sizes between decimal units like KB, MB, GB and binary units like KiB, MiB, GiB. Useful for storage, downloads, hosting, backups, and technical documentation.
This only changes display formatting. The underlying conversion still uses raw byte values.
Decimal units use powers of 1000. Binary units use powers of 1024. Example: 1 MB = 1,000,000 bytes, while 1 MiB = 1,048,576 bytes.
| Unit | System | Converted value |
|---|
Privacy: conversion runs locally in your browser. No values are stored or transmitted.
How it works
This converter first transforms the input into bytes, then converts that byte value into the selected output unit and every other supported unit.
- Decimal units: B, KB, MB, GB, TB use powers of 1000
- Binary units: KiB, MiB, GiB, TiB use powers of 1024
- Detailed output: shows the selected conversion plus a full cross-unit table
- Formatting options: control decimals and scientific notation display
Examples
- 1024 B → 1.024 KB and 1 KiB
- 1 GB → 1000 MB
- 1 GiB → 1024 MiB
- 500 MB → compare decimal and binary interpretations clearly
When to use this tool
This tool is designed for quick, practical tasks such as everyday calculations, data formatting, or simple conversions. It is best used when you need fast results without installing software or using complex tools.
When to use
- Quick checks or one-time calculations
- Validating or converting data before using it elsewhere
- Simple tasks that do not require advanced software
When not to use
- Critical financial, legal, or medical decisions
- Large-scale or automated processing
- Situations requiring guaranteed precision beyond basic validation
Always review results before using them in important contexts.
About this tool
This tool helps you perform quick utility operations directly in your browser. It runs entirely in your browser without sending data to a server.
You can use this tool when handling simple tasks without installing additional software. The results should be interpreted as a processed output based on your input data.
FAQ
- What is the difference between MB and MiB?
MB usually means decimal megabytes based on powers of 1000, while MiB means binary mebibytes based on powers of 1024.
- Should I use decimal or binary units?
Use decimal units when following storage manufacturer labeling and most network transfer discussions. Use binary units when matching operating systems, memory calculations, and technical binary-based measurements.
- Can I convert from bytes to larger units?
Yes. Enter a size in any supported unit and convert it to any other supported unit, including bytes, KB, MB, GB, TB, KiB, MiB, GiB, and TiB.
- Are my values uploaded anywhere?
No. The calculator runs locally in your browser. Values are not stored or transmitted.
- Why do some numbers look different after conversion?
Different unit systems use different bases. Decimal units use 1000, while binary units use 1024, so the same byte count can display differently depending on the target unit.