File Size Calculator
Convert file sizes between Bytes, KB, MB, GB, and TB using the binary 1024-byte system.
File size converter
Convert storage units locally in your browser. No file upload is required.
Converted result
0.1 GB
100 MB converted to GB
Bytes equivalent
100,000,000 bytes
Bits equivalent
800,000,000 bits
Estimated transfer time
8s
Total for 10 files
1 GB
Full conversion table
| Unit | Value | Copy |
|---|---|---|
| bit | 800,000,000 | |
| byte | 100,000,000 | |
| KB | 100,000 | |
| MB | 100 | |
| GB | 0.1 | |
| TB | 0.0001 | |
| KiB | 97,656.25 | |
| MiB | 95.3674 | |
| GiB | 0.0931 | |
| TiB | 0.0001 |
Dynamic file size insights
How File Size Calculation Works
Base unit
The calculator converts the source value into bytes first.
Output unit
Bytes are then divided by the selected output unit size.
Bits
Bits are calculated by multiplying bytes by 8.
Precision
Decimal places control how rounded the final result appears.
Transfer time
Estimated time divides file size by speed in bytes per second.
Local calculation
All calculations run in the browser without backend calls.
Bits, Bytes, KB, MB, GB, TB, and Binary Units Explained
Bit
A bit is the smallest binary data unit.
Byte
1 byte equals 8 bits.
Decimal units
KB, MB, GB, and TB use powers of 1,000.
Binary units
KiB, MiB, GiB, and TiB use powers of 1,024.
KB vs KiB
1 KB is 1,000 bytes; 1 KiB is 1,024 bytes.
Display differences
Storage devices and operating systems may report sizes differently.
Uploads, Downloads, Storage, Compression, and Bandwidth Notes
Upload limits
Email and web forms often limit upload file size.
Download planning
Large files take longer on slower connections.
Bandwidth
Mbps means megabits per second, not megabytes per second.
Compression
Compression can reduce size, depending on the file type.
Overhead
Real transfer times may be longer due to network overhead.
Storage planning
Multiply file size by file count to estimate total capacity.
Developer, Storage, Upload, and Troubleshooting Use Cases
API payloads
Check request and response size limits.
Backups
Estimate total storage for repeated files.
Video files
Plan cloud uploads and downloads.
Images
Estimate image compression targets.
Email attachments
Check whether files fit attachment limits.
Troubleshooting
Compare bytes, MB, MiB, and transfer speed units.
Privacy and Local Processing Notes
Local only
Calculations run locally in the browser.
No account
No sign-up is required.
No file upload
This calculator does not require uploading a file.
No backend storage
Entered values are not sent to a server by this component.
Copy control
Copied results stay under your control.
Private values
You can estimate file sizes without sharing actual files.
Common File Size Examples
Method Explanation
Frequently Asked Questions
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