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Bitrate Calculator

Turn a bitrate and duration into a file size, or a target size into the bitrate you need.

Work out video size or bitrate

kbps kbps
MB
Result: —
Total bitrate: —
Size per minute: —
Duration used: —
Sizes use decimal megabytes, so 1 MB is 1,000,000 bytes and 1 GB is 1,000 MB. Video and audio bitrates are added together.
Common resolution Pixels Megapixels
8K UHD 7680 x 4320 33.18 MP
4K UHD 3840 x 2160 8.29 MP
1440p QHD 2560 x 1440 3.69 MP
1080p Full HD 1920 x 1080 2.07 MP
720p HD 1280 x 720 0.92 MP
480p SD 854 x 480 0.41 MP
Upload guide Frame rate Bitrate
2160p 4K 30 fps 35 to 45 Mbps
1440p 30 fps 16 Mbps
1080p 30 fps 8 Mbps
720p 30 fps 5 Mbps
480p 30 fps 2.5 Mbps
360p 30 fps 1 Mbps
The upload guide lists the bitrates video platforms recommend for standard dynamic range footage.

How to use the Bitrate Calculator

  1. Pick whether you want the file size or the bitrate for a target size.
  2. Enter the bitrates and the duration as mm:ss, or the target size in MB.
  3. Read the result, the total bitrate and the size per minute straight away.

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Frequently Asked Questions

Common questions about the free online bitrate calculator.

Enter the video and audio bitrates in kbps and the duration as mm:ss. The tool multiplies the total bitrate by the duration and divides by eight.
Switch to the Bitrate for a target size mode, enter the size in MB and the duration. The tool works back to the total bitrate you can afford.
Bitrates are in kilobits per second and sizes use decimal megabytes, so 1 MB is 1,000,000 bytes and 1 GB is 1,000 MB.
Yes. The tool adds the audio bitrate to the video bitrate, because a 128 kbps audio track adds about 56 MB to a one hour video.
Eight megabits per second for 3600 seconds is 28,800 megabits, which is 3,600 megabytes or about 3.6 GB.
Use the guide in the tables. For 1080p at 30 fps a video platform such as YouTube recommends around 8 Mbps for standard dynamic range footage.
Encoders vary, and container overhead plus variable bitrate peaks can push the real file size above a simple average bitrate estimate.
Yes. Set the video bitrate to zero and use the audio bitrate, then the size shown is the size of the audio track alone.

Last updated: October 10, 2026