Video File Size Table: Estimated file size by Bitrate
Reference table of estimated file size for Video File Size across a range of bitrate values — exact, engine-computed figures you can read off at a glance.
Video File Size Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Estimated file size
375.00
- In gigabytes
- 0.366
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Video File Size Calculator
The Video File Size Calculator works out your estimated file size, along with 1 related figure in an instant. Enter bitrate and duration and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the bitrate.
- Enter the duration.
- Read off your estimated file size, together with in gigabytes — the calculator updates automatically, with no button to press.
Formula
The Video File Size Calculator uses the formula:
Estimated file size = Bitrate × Duration ÷ 8
Worked example
For example, with bitrate of 5 Mbps and duration of 600 seconds, the estimated file size is 375.00.
| Bitrate | 5 Mbps |
|---|---|
| Duration | 600 seconds |
| Estimated file size | 375.00 |
|---|---|
| In gigabytes | 0.366 |
Results are estimates for educational use, not professional advice.
Frequently asked questions
Multiply bitrate by duration and divide by 8 to convert bits to bytes. A 5 Mbps clip of 600 seconds is about 375 MB.
Bitrate is in megabits per second but file size is in megabytes, and there are 8 bits in a byte.
Higher bitrate, resolution, frame rate and longer duration all increase size. Bitrate is the most direct driver.
If you enter the total bitrate including audio, yes. Otherwise add the audio bitrate to the video bitrate first.
The Video File Size Calculator uses the formula: Estimated file size = Bitrate × Duration ÷ 8. For example, with bitrate of 5 Mbps and duration of 600 seconds, the estimated file size is 375.00.
Enter the bitrate. Enter the duration. Read off your estimated file size, together with in gigabytes — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Video File Size: Formula, Steps & Examples
Learn how to calculate Video File Size — the formula explained step by step, with worked examples and a free calculator to check your answer.