Bitrate Calculator
Bitrate calculator works out Average bitrate and File size from Solve for, File size and Video bitrate. The default figures on this page give average bitrate of 8 Mbit/s; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
2 steps
- Bitrate = 1 MB x 8 / 1 s = 8 Mbit/s
- That is 0.001 GB decimal, or 0.0009 GiB as an operating system reports it.
Its 5 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
2 sources
What the bitrate calculator calculates
Relates video bitrate, duration and file size, solving for whichever is unknown, and reports the storage a recording consumes.
How to use this bitrate calculator
Enter Solve for, File size, Video bitrate and Audio bitrate. Average bitrate updates as you type, and “Use a worked example” loads checked figures you can adjust. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Average bitrate, File size and Duration.
The method follows Bitrate, duration and file size relation: size = bitrate x duration, converting bits to bytes by a factor of 8 and IEC 80000-13, quantities and units for information science and technology.
Research R2097-GT-1: 1 MB in 1 second example
With File size: 1, Duration: 1, the calculator returns Average bitrate: 8. This example is checked against an independent source in the test suite.
What you can compare
Change one input at a time to see how it affects Average bitrate, File size and Duration. The inputs you can vary are Solve for, File size, Video bitrate, Audio bitrate, Duration and Duration in minutes.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
How do I calculate my bitrate?
Relates video bitrate, duration and file size, solving for whichever is unknown, and reports the storage a recording consumes. Open “How this is worked out” beside the result to see each step for your own figures.
How much bitrate for 1920x1080?
On the figures this page opens with — file size 1 MB and duration 1 s — the average bitrate is 8 Mbit/s. No single number fits everyone: change any figure above and the answer updates as you type, with each step of the arithmetic beside it.
Is 100 Mbps bitrate good?
Relates video bitrate, duration and file size, solving for whichever is unknown, and reports the storage a recording consumes. On the figures this page opens with — file size 1 MB and duration 1 s — the average bitrate is 8 Mbit/s. Put your own figures in their place and the working updates beside the result.
What information do I need for the bitrate calculator?
You need Solve for, File size, Video bitrate, Audio bitrate, Duration and Duration in minutes. The page opens with default figures that give average bitrate of 8 Mbit/s, so you can see the scale before entering your own.
What does this bitrate calculator show?
It shows Average bitrate, File size, Duration, Total bitrate including audio and Solved for, with the working and any warnings for your entries.
Can I check how the bitrate calculator result was calculated?
Yes. The “How this is worked out” section shows the calculation steps, and the sources section identifies the references used for the method.