File Size Unit Converter
Convert file sizes across KB/MB/GB/TB and KiB/MiB in one view. Compare decimal vs binary units with adjustable precision and quick copy actions.
File Size Unit Converter
Input Settings
Standard: KB/MB/GB/TB use decimal base (1,000), while KiB/MiB use binary base (1,024).
Enter a value to view conversion results.
Unit-by-Unit Conversion
Click any value to copy| Unit | Value | Copy |
|---|---|---|
| B | 1,000 | |
| KB | 1 | |
| MB | 0.001 | |
| GB | 0.000001 | |
| TB | 0.000000001 | |
| KiB | 0.9765625 | |
| MiB | 0.000953674 |
Quick Reference
- 1 KB = 1,000 B
- 1 MB = 1,000,000 B
- 1 KiB = 1,024 B
- 1 MiB = 1,048,576 B
This converter is intended for quick comparison between decimal and binary units. For billing, contract, or compliance decisions, always follow the official unit definitions from your provider.
What is the File Size Unit Converter?
The File Size Unit Converter converts a single input into KB, MB, GB, TB, KiB, and MiB at the same time. It is designed for situations where unit interpretation directly affects planning, such as cloud storage pricing, upload limits, and capacity reporting.
Because it displays decimal units (KB=1,000B) and binary units (KiB=1,024B) side by side, you can quickly explain why two systems show different numbers for what looks like the same file size.
Common Use Cases
In many teams, product specs, invoices, and technical logs use different unit conventions. A quick, explicit conversion table helps prevent confusion during reviews, budgeting, and customer communication.
- Upload limit checks – Verify whether a platform limit is defined in MB or MiB before testing file acceptance
- Cloud cost estimates – Break down TB-level plans into GB/MB for daily or monthly usage scenarios
- Device capacity explanations – Clarify differences between manufacturer labels and OS-reported values
- Documentation alignment – Standardize references before publishing technical docs or SLA notes
Key Features
Enter a value, select the source unit, and the tool instantly computes all supported units. The output table includes one-click copy actions so you can reuse exact values in tickets, reports, and spreadsheets.
- 7-unit simultaneous conversion – B, KB, MB, GB, TB, KiB, MiB
- Summary KPI cards – Input, total bytes, decimal readable value, and binary readable value
- Precision control – Choose 2, 4, or 6 decimal places
- Quick example chips – Apply common values (1MB, 10GB, 1MiB) instantly
- One-click copy – Copy any converted value directly from the results table
How to Use
Start by entering a number and selecting its original unit. Then set your preferred decimal precision and run the conversion to review summary cards and the full unit table.
- Enter value: Input the file size number you want to convert.
- Select source unit: Choose KB/MB/GB/TB or KiB/MiB as the input basis.
- Set precision: Pick 2, 4, or 6 decimal places for output formatting.
- Review results: Check KPI cards and the full conversion table.
- Copy output: Use the row-level copy button for the exact unit you need.
File Size Converter Details (Decimal vs Binary Standards)
This tool uses decimal factors for KB/MB/GB/TB (1,000-based) and binary factors for KiB/MiB (1,024-based). Internally, it normalizes the input to bytes first, then recalculates all target units from that common base.
For example, 1MB equals 1,000,000 bytes, which is about 0.953674MiB. In reverse, 1MiB equals 1,048,576 bytes, which is about 1.048576MB. That is why billing, storage dashboards, and OS displays may show different values unless unit standards are explicitly aligned.
Frequently Asked Questions
What is the difference between KB and KiB?
KB is decimal (1,000 bytes), while KiB is binary (1,024 bytes). They look similar, but they represent different byte counts.
Why do OS and hardware labels show different capacities?
Vendors often advertise decimal units (GB), while operating systems may present values using binary logic. This standard mismatch causes visible differences.
How do I convert TB to MB?
Under decimal rules, 1TB = 1,000,000MB. Multiply TB by 1,000,000 to get MB.
Does changing decimal places affect the actual calculation?
No. It only changes display precision. The underlying conversion logic remains the same.
Can I use these values as final billing evidence?
Use this as a fast comparison tool first. For billing, compliance, or contractual decisions, always confirm the official unit definition in provider documentation.