Example: Estimated file size 610 MB. Change the values above to calculate your own.
About the Video File Size Calculator
A video's size depends almost entirely on its bitrate: how much data is used per second. Pick a quality preset or enter the bitrate from your camera or encoder settings, add the length, and see the expected size.
Phones typically record 1080p at around 8-17 Mbps and 4K at 35-60 Mbps, which is why a minute of 4K can take 300-450 MB.
How to use the Video File Size Calculator
- Enter your numbers (or keep the example).
- The result updates instantly as you type.
- Copy the result, or copy the link: it keeps your numbers so you can share them.
Typical video file sizes (H.264, 128 kbps audio)
| Quality | Bitrate | 1 minute | 10 minutes | 1 hour |
|---|---|---|---|---|
| 480p | 2.5 Mbps | 19.7 MB | 197 MB | 1.18 GB |
| 720p | 5 Mbps | 38.5 MB | 385 MB | 2.31 GB |
| 1080p | 8 Mbps | 61 MB | 610 MB | 3.66 GB |
| 1080p 60fps | 12 Mbps | 91 MB | 910 MB | 5.46 GB |
| 1440p | 16 Mbps | 121 MB | 1.21 GB | 7.26 GB |
| 4K | 40 Mbps | 301 MB | 3.01 GB | 18.1 GB |
| 4K 60fps | 60 Mbps | 451 MB | 4.51 GB | 27.1 GB |
How it's calculated
Size (bytes) = (video bitrate + audio bitrate) × duration in seconds ÷ 8.
Features
- Instant resultsUpdates as you type.
- Shareable linkThe URL keeps your inputs.
- Reference tableCommon values on this page.
- Works offlineRuns in your browser.
Frequently asked questions
How big is a 1-hour 1080p video?
At 8 Mbps it's about 3.6 GB; phone recordings at higher bitrates can be 7 GB or more.
How can I make a video file smaller?
Lower the bitrate or resolution when exporting. For sharing a short clip, converting to a GIF or extracting just the audio may also help.
Is the Video File Size Calculator free?
Yes, the Video File Size Calculator is free with no sign-up, no limits and no ads covering the result.
Does it work on my phone?
Yes. It works in any modern browser on phones, tablets and computers, and keeps working offline once the page has loaded.
Last updated · Processing happens locally in your browser.