Estimation Accuracy Calculator
Calculate accuracy of project estimates
About this calculator
The Estimation Accuracy Calculator helps project managers and teams evaluate how precisely they predict project costs, timelines, and resources. By comparing original estimates with actual results, this tool calculates accuracy percentages and identifies patterns in estimation performance. This analysis is crucial for improving future project planning, building more realistic budgets, reducing cost overruns, and enhancing stakeholder confidence through data-driven insights into your team's forecasting capabilities.
How to use
Enter your original project estimate and the actual final result in the respective input fields. The calculator will automatically compute the accuracy percentage and variance. Review the results to understand whether you tend to over-estimate or under-estimate, helping you calibrate future predictions more effectively.
Frequently asked questions
What's considered a good estimation accuracy?
Industry standards vary, but 80-90% accuracy is generally considered good, while 95%+ is excellent for most project types.
Should I include all project variables?
Focus on key metrics like budget, timeline, and major deliverables for the most meaningful accuracy assessment.
How can I improve my estimation accuracy?
Track historical data, break projects into smaller components, involve team members in estimates, and regularly review past performance.