How to use this tool
Use the export bitrate in Mbps and duration in minutes. If you want to approximate audio too, add its bitrate in the same unit; 128 kbps is 0.128 Mbps.
How the calculation works
File size in GB = bitrate in Mbps × seconds ÷ 8 ÷ 1,000
Example
A 20 Mbps recording lasting 10 minutes is roughly 1.5 GB before audio and container overhead.
Read the result without overestimating it
A variable-bitrate export can differ from the estimate, and upload services may re-encode it. Check the finished file before making a storage or upload-size commitment.
Why this result matters
File-size planning helps creators reserve storage and choose export settings for trailers, gameplay captures, and social clips.
Tips for a more useful estimate
- Add audio bitrate for a closer estimate.
- Variable bitrate files may differ.
- Platform re-encoding can change the uploaded size.
Frequently asked questions
Why divide by eight?
Network bitrate uses bits while file size uses bytes; eight bits equal one byte.
Does resolution determine file size?
Bitrate and duration determine this estimate, though resolution influences the bitrate you may choose.
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Explore Freshness Speed RunPrepared by Dorn Bros Entertainment · Updated October 18, 2026 · Report a calculation issue
This free tool provides an estimate for general informational purposes. It is not financial, tax, legal, or professional advice.