Recommended Video Bitrate Calculator
Choosing a video bitrate is a balance between file size and visual quality, and a clear way to estimate a sensible target is to work from the raw pixel rate. Multiply the frame width by the height to get the pixels in one frame, multiply by the frame rate to get pixels delivered per second, then multiply by a bits-per-pixel quality factor that captures how many bits each pixel costs after compression. The result is a bitrate in bits per second, which divides by one million to give the more familiar megabits per second. This calculator makes each step visible so you can see exactly why a higher resolution, a higher frame rate or a richer quality factor all push the bitrate up. The bits-per-pixel factor is the quality dial: around 0.05 gives small, more compressed files, around 0.15 gives clean images at a larger size, and 0.1 is a reasonable general-purpose starting point. Because real encoders use variable bitrate and codec-specific tricks, treat the figure as a transparent first estimate rather than an exact requirement, and adjust to suit your content and codec. Every figure here is computed deterministically from the formula shown below, with a worked example that reconciles exactly to the calculator.
Target bitrate is the pixel rate times a quality factor: bitrate = width x height x fps x bits per pixel. At 1920 x 1080, 30 fps and 0.1 bits per pixel, that is 6,220,800 bps, or about 6.22 Mbps.
Video bitrate formula
bitrate (bps) = width x height x fps x bpp
width, height = frame size in pixels
fps = frame rate in frames per second
bpp = bits-per-pixel quality factor
Mbps = bitrate / 1,000,000
The product of width, height and frame rate is the pixel rate per second. Multiplying by a bits-per-pixel factor turns that into a data rate, which is then expressed in megabits.
Worked example
A 1920 by 1080 video at 30 frames per second with a quality factor of 0.1 bits per pixel.
- Pixels per frame: 1,920 x 1,080 = 2,073,600.
- Pixels per second: 2,073,600 x 30 = 62,208,000.
- Bitrate: 62,208,000 x 0.1 = 6,220,800 bits per second.
- In megabits: 6,220,800 / 1,000,000 = 6.22 Mbps.
The recommended bitrate is 6.22 Mbps. These are the calculator's default inputs, so the result above matches the widget exactly.
Estimates at common resolutions (30 fps, 0.1 bpp)
| Resolution | Pixels | Bitrate |
|---|---|---|
| 1280 x 720 | 921,600 | 2.76 Mbps |
| 1920 x 1080 | 2,073,600 | 6.22 Mbps |
| 2560 x 1440 | 3,686,400 | 11.06 Mbps |
| 3840 x 2160 | 8,294,400 | 24.88 Mbps |
Units of information and measurement: US National Institute of Standards and Technology.
Video bitrate calculator: frequently asked questions
How is a target video bitrate estimated?
Multiply the frame width by the height to get pixels per frame, multiply by the frame rate to get pixels per second, then multiply by a bits-per-pixel quality factor. The result is the bitrate in bits per second, which is divided by one million to give megabits per second. A higher bits-per-pixel value yields a sharper, larger file.
What is the bits-per-pixel factor?
It is a quality coefficient that captures how many bits, on average, each pixel costs after compression. Lower values such as 0.05 produce smaller files with more compression artefacts, while higher values such as 0.15 produce cleaner images at a larger size. A value around 0.1 is a reasonable general-purpose starting point for typical content.
Why does frame rate change the bitrate?
Because bitrate is data per second, and a higher frame rate packs more frames into each second. Doubling the frame rate from 30 to 60 frames per second roughly doubles the pixels delivered per second, so the recommended bitrate scales up accordingly to keep the same per-pixel quality.
Is this an exact requirement?
No. Real encoders use variable bitrate, motion estimation and codec-specific efficiency, so the actual bitrate needed for a given quality depends heavily on the content and the codec. This calculator gives a transparent first estimate from resolution, frame rate and a quality factor; treat it as a starting point and adjust to taste.
How do I get a smaller file?
Lower the bits-per-pixel factor, reduce the resolution, or reduce the frame rate, each of which lowers the estimated bitrate. Modern codecs also achieve more at a given bitrate than older ones. The calculator lets you change each input so you can see the trade-off between file size and visual quality directly.
Official sources
- Units of digital information and measurement: US National Institute of Standards and Technology (NIST). As at 25 June 2026.
Reviewed by the CalculatorHub team, edited by James Graham, 25 June 2026. See our methodology. This is general information, not financial, tax, legal or investment advice.