Math
ETA Calculator
Project a completion time from total work, completed work, and elapsed minutes for a batch job or transfer.
About this tool
When to use it
Project a completion time from total work, completed work, and elapsed minutes for a batch job or transfer.
How to use it
Enter total and completed work in the same unit, then elapsed minutes and Calculate ETA. Recalculate as the job progresses. Treat the displayed completion clock as a projection using your browser's current time.
Guide updated . Examples checked against this implementation.
Worked examples
A quarter-complete batch
Input
Total: 100; Completed: 25; Elapsed minutes: 5Expected output
Remaining work: 75; Rate per minute: 5; Time remaining: 00:15:00At five items per minute, 75 remaining items require 15 minutes. The wall-clock completion time depends on when the calculation runs.
Errors and unsupported input
Completed: 0Wait for measurable progress or supply a separately measured rate elsewhere. No observed rate can be calculated before any work completes.
Continue this workflow
- Benchmark Builder: Summarize measured throughput before comparing repeated job runs.
Questions
Frequently asked questions
Does the completion time update automatically?
It is calculated when you select Calculate ETA. Enter newer progress measurements and calculate again to refresh the estimate.