What the numbers mean
Enter the video’s bitrate, not the advertised speed of your broadband plan. If your player does not show bitrate, use a clearly understood estimate.
A worked example
At a constant 8 Mbps, one screen watched for two hours uses approximately 7.2 GB. Over 30 days, that is 216 GB before additional overhead and other traffic.
The calculation
Mbps × 3,600 seconds ÷ 8 bits ÷ 1,000 = 0.45 GB per hour for each Mbps. Adaptive streams can change bitrate, so actual usage can differ.
This tool does not measure your connection, inspect your account or send these inputs anywhere.