Formula and example
File size in bytes = bitrate in bits per second x duration in seconds / 8. For a 10 minute file at 8 Mbps, the estimate is about 600 MB before container overhead or variable bitrate changes.
Calculators & Converters
File Size Calculator
Estimate media file size from bitrate and duration, or convert between decimal and binary storage units.
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Calculator
Estimate file size from bitrate and duration
Enter a media bitrate and length to estimate the saved file size, then compare decimal and binary units.
Estimated size600 MB
572 MiB
Duration600 sec
Bitrate estimates use bits per second divided by 8.
Convert file size units
250 MB238 MiB0.25 GB0.23 GiB
Local processing: Your file size values are calculated in your browser. They are not uploaded to our server.
How to use this file size calculator
Use the bitrate fields for video, audio, screen recordings, exports, and streaming files where you know the average bitrate. Use the unit converter when you need to compare MB, MiB, GB, and GiB labels.
Video exportsAudio filesUpload planningUnit conversion
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This calculator belongs to the calculators and converters collection. It pairs well with layout and image tools when preparing assets for upload limits.
FAQ
Why are MB and MiB different?
MB uses decimal units where 1 MB is 1,000,000 bytes. MiB uses binary units where 1 MiB is 1,048,576 bytes.
Is the bitrate estimate exact?
It is an estimate based on average bitrate and duration. Real files may vary because of container overhead, metadata, codec settings, and variable bitrate encoding.
Does this upload my media file?
No. This calculator works with numbers only in your browser. It does not upload, inspect, or store media files.
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