Construction Delay Analysis Calculator
This tool helps project managers and engineers assess the impact of delays on construction projects by calculating the potential effects on the project timeline and costs.
Delay Calculator
Results
Data Source and Methodology
This calculator uses data from the Project Management Institute's PMBOK® Guide (2017). All calculations are based on standard project management formulas used in the construction industry.
The Formula Explained
To calculate the impact of a delay:
Total Delay = Actual Duration - Planned DurationAdditional Cost = Total Delay × Daily Cost
Glossary of Variables
- Planned Duration: The original estimated time to complete the project.
- Actual Duration: The actual time taken to complete the project.
- Daily Cost: The cost incurred for each day of the project.
- Total Delay: The difference in days between the planned and actual duration.
- Additional Cost: The extra cost incurred due to the delay.
How It Works: A Step-by-Step Example
Suppose a project was planned to complete in 100 days, but actually took 110 days, with a daily cost of $500:
- Total Delay = 110 - 100 = 10 days
- Additional Cost = 10 × $500 = $5000
Frequently Asked Questions (FAQ)
What is delay analysis in construction?
Delay analysis involves evaluating project delays and determining their causes and impacts on project timelines and costs.
How does this calculator help in project management?
It provides a quick assessment of delay impacts, helping project managers make informed decisions.
What data should I enter?
You need to enter the planned duration, actual duration, and daily cost of your project.
Can this calculator be used for any project?
Yes, it is designed for any construction project that requires delay analysis.
Why is understanding delay costs important?
Knowing the costs helps in budgeting, planning, and avoiding potential financial overruns.
Formula (LaTeX) + variables + units
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Total Delay = Actual Duration - Planned Duration Additional Cost = Total Delay × Daily Cost
- T = property tax (annual or monthly depending on input) (currency)
- NIST — Weights and measures — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/weights-and-measures - FTC — Consumer advice — consumer.ftc.gov · Accessed 2026-01-19
https://consumer.ftc.gov/
Last code update: 2026-01-19
- Initial audit spec draft generated from HTML extraction (review required).
- Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
- Confirm sources are authoritative and relevant to the calculator methodology.