Video Bitrate Calculator
Target video bitrate for a desired file size and duration.
Enter your values
Enter the target file size in GB.
Enter the video duration in minutes.
Enter the audio bitrate in kbps.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Total bitrate needed
- 14317 kbps
- Video bitrate
- 14189 kbps
- Audio bitrate
- 128 kbps
Quick answer
Bitrate = target file size (bits) / duration (seconds).
bitrate = size / duration
At a glance
| What it does | Target video bitrate for a desired file size and duration. |
|---|---|
| Category | Technology |
| Inputs needed | Target file size, Video duration, Audio bitrate |
| Main output | Total bitrate needed |
| Formula | bitrate = size / duration |
| Cost | Free — no sign-up, no download |
How to use the Video Bitrate Calculator
- 1Enter your target file size and the video's total duration.
- 2Enter the audio bitrate you plan to use (128 kbps is typical for stereo AAC/MP3).
- 3Set the video encoder to the calculated video bitrate to hit your file size target.
Inputs explained
- Target file size(GB)
- Enter the target file size in GB.
- Video duration(minutes)
- Enter the video duration in minutes.
- Audio bitrate(kbps)
- Enter the audio bitrate in kbps.
Worked example
Using the values the calculator loads with:
Inputs
- Target file size1 GB
- Video duration10 minutes
- Audio bitrate128 kbps
Results
- Total bitrate needed14317 kbps
- Video bitrate14189 kbps
- Audio bitrate128 kbps
Frequently asked questions
Why subtract audio bitrate?
Total file size is shared between video and audio streams, so audio must be subtracted to size the video track correctly.
What bitrate do I need for 1080p?
Streaming platforms commonly recommend 8-12 Mbps for 1080p at 30fps, higher for 60fps or HDR.
What do I need to enter into the Video Bitrate Calculator?
Just 3 values: target file size, video duration, audio bitrate. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Video Bitrate Calculator work out the answer?
Bitrate = target file size (bits) / duration (seconds). It applies the formula bitrate = size / duration and shows the working so you can check each step by hand.
Is the Video Bitrate Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.