Video file size calculator

Pick how long the video is, its resolution and its frame rate. We estimate how big the MP4 will be.

Length

min sec

Resolution

720p 1080p 1440p 4K

Frame rate

30 fps 60 fps

Video bitrate (Mbps)

Estimated size0 MB

At other resolutions

720p 0 MB
1080p 0 MB
1440p 0 MB
4K 0 MB

Everything is worked out in your browser. Nothing is sent anywhere.

How the estimate works

The size is the bitrate times the length. A 1080p video at 8 Mbps stores 8 megabits each second, which is 1 MB per second and about 60 MB per minute. Audio adds about 1 MB per minute.

The bitrate for each resolution is a common value for H.264 video, close to what YouTube recommends for uploads. If you know your file's exact bitrate, type it into the calculator.

Screen recordings are often smaller

An encoder spends little data on frames that don't change. A still slide or a code editor takes far less space than a page you scroll or a video that plays. So a real screen recording can come out smaller than this estimate, and one with a lot of motion can come out bigger.

To make files smaller, record at 1080p instead of the native resolution of a big screen, use 30 fps when you talk over slides or code, and keep videos short. In Director you choose the resolution and frame rate before you record. Read the guide to the best video format for screen recording or 30 vs 60 fps.

Questions, answered.

Still curious? Join the waitlist and try Director first.

01 How big is a 10-minute 1080p video?

About 600 MB at 30 fps with an 8 Mbps bitrate, and about 900 MB at 60 fps with 12 Mbps. A screen recording with little motion is often smaller.

02 How much space does an hour of 1080p screen recording take?

At these bitrates, about 3.6 GB at 30 fps and about 5.4 GB at 60 fps. If the screen barely changes, the real file is often smaller.

03 Does 60 fps double the file size?

Not quite. At common bitrates, 60 fps uses about one and a half times the data of 30 fps, because each frame looks a lot like the one before.

04 Does the calculator keep my data?

No. The math runs in your browser and nothing is sent to any server.

05 How do I record smaller files with Director?

In Director you choose native resolution, 1440p, 1080p or 720p, at 60 or 30 fps, and it saves an H.264 MP4 with your graphics card's encoder. Going down to 1080p and using 30 fps when the screen moves little gives lighter files. Director is in private testing on Windows 10 and 11, with a waitlist.

Early access · private testing

Record your screen with live zooms.

Join the waitlist and get early access to Director for Windows.

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