Video size calculator
A minute of 1080p video at good quality is about 33 MB
- Free to use
- Private
- No upload to the cloud
- No account needed
Video size calculator
The tool would make
Work email counts the encoded message, so the file itself is about 7.2 MB.
| Resolution | Length |
|---|
Short answer
How many MB is a video? It depends on its length, resolution and bitrate. Enter the length of your video and the size you need, and the calculator shows what the tool would make: the resolution, the frame rate and the bitrates. At good quality a minute of video takes about 33 MB at 1080p, 15 MB at 720p and 7.2 MB at 480p. Straight from an iPhone, a minute is 70 to 105 MB at 1080p and more than 175 MB in 4K at 30 fps, according to Apple. No file is involved, so nothing is uploaded to a server.
How to use the video size calculator
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Enter the length and how it was recorded
Type the length of the video in minutes and seconds. As a video length to file size calculator, it does not need the video itself, only how long it runs. Under Recorded in, choose 1080p, the iPhone default, or 4K at 30 fps: a video size calculator for 4K as well. The sound is stereo.
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Pick the size
Choose 25 MB, 20 MB or 10 MB, or type a limit of your own. The 10 MB size is for strict work email, which counts the encoded message. For a video on WhatsApp, type 64 MB; compress video for WhatsApp explains that limit.
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Read the result
The calculator runs the same planner as the video tool. It shows the resolution and frame rate the tool would pick, the bitrate of the picture and the sound, and whether the quality is good, softer or low. What that means is explained on video compressor without losing quality.
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Check the table, then compress
Below the result, a table lists the longest video that fits at good quality in each resolution, a quick way to estimate video file size before you convert anything. When you are happy with the numbers, the button opens the video compressor.
How many MB per minute of video
The calculator works from the data a picture needs to look good. A picture counts as good quality at 0.07 bits per pixel at 30 frames per second, plus 96 kbit/s for the sound. That gives the 1080p video size per minute below, and the 720p video size per minute, and the 480p one. The 4K video size per minute is more than 175 MB straight from an iPhone, according to Apple; choosing 4K under Recorded in adds 2160p and 1440p rows to the table.
| Resolution | Data for good quality | Size per minute of video |
|---|---|---|
| 1080p | About 4.45 Mbit/s | About 33 MB |
| 720p | About 2.0 Mbit/s | About 15 MB |
| 480p | About 0.96 Mbit/s | About 7.2 MB |
Figures from this tool’s own settings, checked 8 October 2026.
Questions about video size
How many MB is a 1 minute video?
It depends on the resolution and the bitrate. Straight from an iPhone, a minute at 1080p is 70 to 105 MB, according to Apple. After this tool at good quality, a minute is about 33 MB at 1080p, 15 MB at 720p and 7.2 MB at 480p.
How many MB is a 1 minute 4K video?
More than 175 MB straight from an iPhone in 4K at 30 fps, according to Apple. With Balanced, which sets no size target, the tool makes a minute of 4K about 41 MB at Up to 1080p, 19 MB at Up to 720p and 9 MB at Up to 480p. See convert 4K video to 1080p.
How many minutes of video is 25MB?
At good quality, about 41 seconds at 1080p, 1 minute 31 seconds at 720p and 3 minutes 14 seconds at 480p. The tool aims slightly under the size. Longer videos still fit, because the tool lowers the resolution and says when quality drops. More on compress video to 25 MB.
How many MB is a 5 minute video?
Straight from an iPhone at 1080p, about 350 to 525 MB. After this tool at good quality, about 165 MB at 1080p, 75 MB at 720p and 36 MB at 480p.
How many GB is a 1 hour video?
Straight from an iPhone at 1080p, about 4 to 6 GB: 70 to 105 MB a minute, multiplied by 60. In 4K at 30 fps, more than 10 GB. At good quality in this tool, an hour comes to about 2 GB at 1080p and about 0.9 GB at 720p.
How to calculate video file size?
Multiply the total bitrate by the length in seconds and divide by 8. A video at 4.45 Mbit/s for 60 seconds is about 33 MB. Sound adds its own bitrate, and the container adds a little more. The calculator does this for you and keeps a small reserve.
How big is a 1 minute video file for email?
Gmail, Yahoo Mail and Outlook.com accept up to 25 MB of attachments. A minute at 720p, about 15 MB at good quality, fits. A minute at 1080p, about 33 MB, does not, so the tool lowers the picture to fit.
Is the video file size calculator free, and is my video uploaded?
It is free and needs no sign-up. You only enter a length and a size, so there is no file to upload and the numbers are worked out in your browser. The video compressor converts a video on your own device and never sends it to a server.
On iPhone
Video Compressor: Metras
Our iPhone app makes smaller copies of the videos in your library, right on the device. Choose 25 MB, 20 MB or 10 MB, or enter a size of your own, see the estimate before you start, and compare the copy with the original afterwards. Nothing is uploaded to a server, large batches run in the background with Premium, and your originals stay in Photos until you decide.
Coming soon to the App Store
