The sum
Size is length multiplied by bitrate. A megabit is an eighth of a megabyte, so a 10-minute video at 8 megabits a second is 600 seconds × 8 ÷ 8 = 600 MB for the picture, plus the sound. The calculator shows that working under every answer.
Video file size calculator
Work out how big a video file will be from its length and bitrate, with YouTube's recommended bitrates built in.
- Free, no account
- Runs in your browser, nothing uploaded
Runs in your browser. Nothing is uploaded.
Result
Change any number and the answer updates.
Planning an upload?
The Studio free plan takes recordings up to 2 GB, so most files go as they are.
00:20How it works
How to work out a video's file size
- Type the lengthAs minutes and seconds (10:00), hours (1:30:00) or plain seconds.
- Pick a typical bitrate, or type your ownThe list holds YouTube's recommended upload bitrates for each frame size and frame rate.
- Choose the audio bitrateThe answer updates as you type.
00:30The details
What goes in and what comes out
- Privacy
- The sums run inside your browser. Nothing you type is sent anywhere.
- Cost
- Free. No account, no watermark, no trial that runs out.
00:35Worth knowing
Getting a good result
Where the bitrates come from
YouTube publishes the upload bitrates it recommends: 8 Mbps for 1080p at up to 30 frames a second and 12 Mbps at 60, 5 and 7.5 Mbps for 720p, 35 to 45 Mbps for 4K. Cameras and phones often record higher than that; exports for sharing are often lower.
Why real files differ a little
Most encoders use a variable bitrate, spending more on busy scenes and less on still ones, and the container adds about one percent. Treat the answer as a close estimate, and check the real file against a hard limit.
00:40Questions
Video file size calculator: common questions
How big is one hour of 1080p video?
At YouTube's recommended 8 Mbps with 192 kbps sound, about 3.7 GB. At 16 Mbps it is about 7.3 GB, and at 20 Mbps about 9.1 GB.
Is a megabyte 1,000 or 1,024 kilobytes here?
1,000,000 bytes, the way storage and upload limits are usually stated. Windows shows sizes in units of 1,024, so the same file looks about 5 percent smaller there.
How do I find my video's bitrate?
The metadata viewer shows it.
Is anything I type sent anywhere?
No. The sum is done by your browser.
What people do next
All planning toolsVideo bitrate calculator
Work out the bitrate that makes a video fit a size limit, such as a 25 MB email attachment.
Video compressor
Make a video file smaller: pick a quality level or name the size in megabytes it has to fit under.
Video upload time calculator
Estimate how long a file takes to upload at your connection's real upload speed.
Video metadata viewer
See what is inside a media file: codecs, resolution, frame rate, bitrate, and the tags it carries.
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