IT & Developers
Bandwidth Calculator - Calculate download times and data usage
Calculate download times and data usage
Formulas and edge cases are reviewed against authoritative references before publication. For methodology, editorial standards, or corrections, use the links below.
Frequently asked questions
Why real-world estimate?
Actual speeds are ~80% of advertised due to overhead, congestion, and protocol inefficiencies.
Mbps vs MB/s?
ISPs advertise in Mbps (bits). Divide by 8 for MB/s (bytes). 100 Mbps ≈ 12.5 MB/s.
How much data does streaming use?
SD: ~1 GB/hr, HD: ~3 GB/hr, 4K: ~7 GB/hr for video streaming.
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About this tool
This Bandwidth Calculator turns your inputs into practical results. Provide Streaming Duration, Download time, and Data usage to calculate Download Time and Data Usage.
Adjust values to compare scenarios and see how sensitive the result is. The calculation uses the numbers as entered, so double-check units and expect small differences from rounding in the displayed totals.