Video File Size Calculator
Storage needed for any bitrate and duration.
Enter your values
ⓘ Live results
Results
- File size
- 11.06 GB
- Per minute
- 377.4 MB
- Hours on a 1 TB drive
- 46.3
- Upload time at 20 Mbps
- 75.5 minutes
Quick answer
Video file size is bitrate × duration; at 4K 100 Mbps, one minute consumes about 750 MB.
Size (MB) = bitrate (Mbps) × seconds ÷ 8
How to use the Video File Size Calculator
- 1Enter your recording bitrate.
- 2Enter the duration in minutes.
- 3Add the audio bitrate for an accurate total.
Worked example
Using the values the calculator loads with:
Inputs
- Video bitrate50 Mbps
- Duration30 minutes
- Audio bitrate320 kbps
Results
- File size11.06 GB
- Per minute377.4 MB
- Hours on a 1 TB drive46.3
- Upload time at 20 Mbps75.5 minutes
Frequently asked questions
What bitrate should I record at?
1080p30 looks good at 8–12 Mbps for delivery; 4K editing masters usually run 50–100 Mbps or higher.
Does resolution alone determine size?
No — bitrate does. A low-bitrate 4K file can be smaller than a high-bitrate 1080p file, but it will look worse.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.