Audio File Size Calculator

Formula

kbps×1000×seconds÷8÷1e6

Worked example

320kbps for 5min — 12MB

Quick answer

What does the Audio File Size Calculator do?

Estimate compressed audio size from bitrate and duration.

What is the Audio File Size Calculator?

Estimate compressed audio size from bitrate and duration. Use it when you have the required inputs and want a deterministic, repeatable result with the calculation method visible.

How to use this calculator

Enter the values requested by the tool, keep units and time periods consistent, resolve any validation message, calculate, then review the primary answer together with the displayed formula and supporting values.

Formula and method

This calculator uses the deterministic formula kbps×1000×seconds÷8÷1e6. Enter the required values, then review the displayed substitution and result breakdown to verify the calculation.

Worked example

320kbps for 5min 12MB

Common mistakes to avoid

Check units, decimal points, percentages, signs, date/time order, selector choices, and rounding. For important decisions, verify the result against an independent source or qualified professional when appropriate.