Task Time Estimator
PERT expected duration = (optimistic + 4 × most likely + pessimistic) / 6. Enter your own values; the result updates only when you run the tool.
Your inputs
Use consistent units. Examples appear below each field.
Your result
Ready when you are.
Make the numbers useful.
Fill in the input panel and run the tool. Your answer and its calculation method will appear here.
How task time estimator works
PERT expected duration = (optimistic + 4 × most likely + pessimistic) / 6.
Try this example
- Optimistic hours
- 2
- Most likely hours
- 4
- Pessimistic hours
- 10
4.6666667
Good to know
Which values should I enter?
Use the units shown in each label. PERT expected duration = (optimistic + 4 × most likely + pessimistic) / 6.
Are my inputs saved automatically?
No. Recent tools contain tool names only. Inputs and results are stored only when you explicitly choose Save while signed in.
Can I share this tool?
Share the tool link. It opens a blank tool and does not include your private inputs or result.
Keep going
Related tools for the same kind of task.
Meeting Cost Calculator
Meeting labor cost = attendees × average hourly cost × duration. Enter your own values; the result updates only when you run the tool.
Use this toolFocus Session Planner
Total session time includes breaks between sessions, with no trailing break. Enter your own values; the result updates only when you run the tool.
Use this toolWeekly Hours Calculator
Add up to seven daily work-hour totals. Enter your own values; the result updates only when you run the tool.
Use this toolTask Completion Percentage
Completion rate = completed tasks / planned tasks × 100. Enter your own values; the result updates only when you run the tool.
Use this tool