Everyday utility

File Size Storage Calculator

Convert file sizes and estimate how much storage a set of files will use. Use this Data and utilities tool to enter your numbers, review the result, and understand the key assumptions before making the next decision.

What you get
A focused calculator, clear explanation, common questions, and useful next tools.
Quick intro
Calculator
Result
Explanation
Common questions
Related tools

Calculator tool

How this calculator works
The result depends on the numbers you enter and the assumptions shown below.

Storage vendors usually use decimal units where 1 GB is 1,000 MB, while operating systems often display binary units where 1 GiB is 1,024 MiB. This calculator applies the selected standard before multiplying by file count.

Review the inputs carefully and treat the output as an estimate. For decisions involving money, taxes, health, law, or security, compare the result with trusted professional guidance when needed.

Frequently asked questions

What is the difference between GB and GiB?

GB is decimal and based on powers of 1,000. GiB is binary and based on powers of 1,024, so the same files may appear smaller or larger depending on the display standard.

Can this estimate video storage?

Yes. Enter the expected file size or daily usage for video files and compare the result across storage units.