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File Size Converter

Convert storage sizes between bytes, KB, MB, GB, and TB using consistent binary scaling.

Last reviewed: April 30, 2026Free toolMethodology

File Size Converter

These fields start with sample inputs. Keep them or replace them, then run the tool to show a fresh result.

Number fields accept plain values and common formatted input such as 250000, 250,000, or 1,234.56.

Result

Calculating the sample result.

Why it matters

File sizes appear everywhere in hosting, backups, uploads, and product limits, and consistent conversion prevents planning mistakes.

When to use

  • Checking upload limits
  • Planning storage consumption
  • Translating provider size thresholds into readable numbers

Inputs & Outputs

Inputs

  • Size value is the quantity you want to convert.
  • Input unit defines the starting storage unit.

Outputs

  • Converted values show the equivalent size across common storage units.
  • Byte total helps compare exact storage requirements.

Storage conversion method

The tool converts the source value into bytes using binary multiples, then derives the equivalent values in larger or smaller units.

1 KB = 1024 bytes in this binary conversion model

Worked example

1

Upload limit check

A team wants to know how many bytes are in a 25 MB upload limit.

Inputs

  • Value: 25
  • Input unit: MB

Steps

  • Convert the source value to bytes
  • Render alternate unit equivalents

Result

  • The output shows the exact byte value alongside the other units.

Edge cases & caveats

  • Some vendors use decimal units instead of binary units, so always confirm the provider's definition.
  • Large unit conversions can look similar at a glance but differ materially at scale.

Frequently Asked Questions

Why do some systems say 1 MB is 1,000,000 bytes?

Because some interfaces use decimal storage units while others use binary-based units. This tool uses binary scaling for consistency.

Does this work for database or backup sizing?

Yes. It is a general size conversion tool for any storage measurement.

Keep going

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