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Math

ETA calculator

Estimate total duration and completion time from total items, consumption rate, and start time.

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Using this tool

Estimate batch duration and UTC completion time from a constant processing rate.

Actions: Calculate

Example

No text input: 10 items at 2 per minute with an explicit UTC start time.

Example action and settings

Action: Calculate
Total items: 10
Items per time span: 2
Time span: 1
Time unit: Minutes
Start time (ISO; blank means now): 2026-01-01T00:00:00Z

Input / action

Result / expected behavior
Total duration (seconds): 300
Duration: 0d 0h 5m 0s
Start: 2026-01-01T00:00:00.000Z
Estimated completion: 2026-01-01T00:05:00.000Z
Assumes a constant processing rate.
Available options: Total items · Items per time span · Time span · Time unit · Start time (ISO; blank means now)
Scope and limitations
  • Assumes a constant rate; it does not track actual progress, queues, or pauses.
Common mistakes
  • Rate and time span must be positive; a blank start time uses the current time.
Related tools
Chronometer  Percentage calculator  
Privacy and browser support
Input is processed in this browser. Do not use real keys or active sensitive credentials as demonstration data. Device features require browser support and your permission.