Calculating Three Point Estimates

Introduction & Importance

Three point estimation is a technique used to estimate project tasks…

How to Use This Calculator

1. Enter the optimistic, pessimistic, and most likely estimates for your task.
2. Click ‘Calculate’.
3. View your results and chart below.

Formula & Methodology

The formula for three point estimation is (O + P + 4M) / 6, where…

Real-World Examples

Example 1

Let’s say you’re estimating a task with…

Data & Statistics

Comparison of Estimation Methods

Method	Best Case	Worst Case	Most Likely
Three Point	O	P	M
Average	(O+P+M)/3	—	—

Expert Tips

• Always use realistic estimates.
• Consider using this method for complex tasks.

Interactive FAQ

What is the difference between three point estimation and average estimation?

Three point estimation considers best, worst, and most likely cases…

PMBOK Guide – Project Management Education