utils logo UTILS
Free online tools to generate, calculate,
convert, format, encode, and play.
 

Task Time Estimator

Break your project into tasks, estimate optimistic, likely, and pessimistic durations, and get PERT-weighted totals with buffer recommendations.

Tasks

Results update as you type.

How It Works

PERT (Program Evaluation and Review Technique) uses three estimates per task to calculate a weighted average that accounts for uncertainty.

PERT Estimate = (Optimistic + 4 × Likely + Pessimistic) / 6

Standard Deviation measures how much uncertainty exists in each task estimate:

σ = (Pessimistic − Optimistic) / 6

For the entire project: σtotal = √(σ1² + σ2² + ... + σn²)

Buffer Recommendation: A 20% buffer is added to the PERT estimate to account for unforeseen delays, context switching, meetings, and other overhead that commonly affect task completion.

For higher confidence, use the 95% estimate (PERT + 2σ) which covers two standard deviations of uncertainty.

Embed This Util

You can embed this util on your own site as a widget. Adding ?embed=1 to the URL loads a compact version with just the tool itself; no header, menu, or documentation. Paste this snippet into your HTML: 


    

       Copy snippet
      Adjust the height to taste.
    

  




          

          
          
 Related Utils

            

              

                 Pomodoro Timer
                 Event Countdown
                 Countdown Timer
              

            

          


          

          

          

              Feedback
          

          

            

              Help us improve this page by providing feedback,
              and include your name/email if you want us to reach back. Thank you in advance.
            

            

              
              

              
            

          

          
          
          
          

          

            Share with