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TechnologyGenerated accuracy model review: 2026-05-06
Download Time accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- Time = (File Size * 8) / Speed (normalized to bits).
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- File Size: 10 GB
- Size Unit: GB
- Internet Speed: 100 Mbps
- Speed Unit: Mbps (Megabits)
Expected outputs
- Time Required: 13m 39s
- Total Seconds: 819
Known limitations
- This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
- Use the result as a planning estimate unless the calculator page states a stricter purpose.
Assumptions
- File size is converted using 1024 MB per GB and 1024 GB per TB in this tool.
- Connection speed is assumed to be steady for the entire transfer.
- A zero or negative transfer speed is invalid rather than an infinite-duration success case.
Unit handling
- File Size accepts values in GB.
- Size Unit accepts one of the configured options.
- Internet Speed accepts values in Mbps.
- Speed Unit accepts one of the configured options.
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current download-time-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Download Time.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.