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Use the labelled fields in the workspace above. If example values are provided, try them first or replace them with your own.
Work & productivity · Free online tool
Task time estimator
Combine optimistic, likely and cautious estimates into a more realistic task duration.
3 guest runs per rolling 24 hours10 with a free accountPrivate inputsMobile-friendly
Task time estimator workspace
Runs locally in your browser
Result
Plan for—
Base estimate—
Focused workdays—
Estimate summary
Task estimate breakdown
Use it with confidence
How to use the task time estimator.
Calculate and review
Use the main action when needed. PERT expected time = (optimistic + 4 × likely + pessimistic) ÷ 6, with a simple uncertainty range.
Try a worked example
For 2, 4 and 9 hours, the weighted PERT estimate is (2 + 4×4 + 9) ÷ 6 = 4.5 hours.
Check the assumptions
Unknown dependencies and queue time can dominate the estimate; revisit it as the work becomes clearer.
Helpful answers
Task time estimator FAQs.
Is the task time estimator free?
Yes. Guests receive 3 runs per rolling 24 hours, verified free accounts receive 10, and Premium subscribers receive unlimited normal use.
Does UtilHub upload or save my inputs?
No. This tool runs in your browser and UtilHub does not receive or store the values you enter. Your browser or device may still retain normal local history or form data.
How does this task time estimator work?
PERT expected time = (optimistic + 4 × likely + pessimistic) ÷ 6, with a simple uncertainty range.
What should I check before using the result?
Unknown dependencies and queue time can dominate the estimate; revisit it as the work becomes clearer.