Critical Path Calculator
Calculate critical path, float times, and project duration from activity networks. Identify critical activities and scheduling flexibility.
Add activities to calculate the critical path
REFERENCE INFORMATION
This tool provides standard reference data compiled from industry sources.
Note:
• Data is provided for quick reference and may not reflect the most current standards or specifications.
About This Calculator
The Critical Path Calculator helps project planners and schedulers perform Critical Path Method (CPM) analysis for construction projects across the UAE and Gulf. Calculate critical path, total float, free float, and project duration from activity networks. Identify critical activities that drive project completion and activities with scheduling flexibility.
When to Use This Calculator
- Identifying activities that control project duration
- Calculating float to understand scheduling flexibility
- Analyzing delay impacts on project completion
- Supporting extension of time (EOT) claims
- Optimizing resource allocation on critical activities
How to Use This Calculator
Define Activities
Enter activity names, durations, and predecessor relationships (FS, SS, FF, SF with lags).
Build Network
The calculator creates the activity network and calculates early/late dates.
Identify Critical Path
View the longest path through the network that determines project duration.
Review Float Analysis
See total float and free float for each activity to understand scheduling flexibility.
Export Results
Generate CPM analysis summary for import to Primavera P6 or project reports.
Typical Scenarios in UAE & Gulf Projects
Planning engineer validates baseline schedule for a 45-floor tower. CPM analysis shows critical path: Piling → Raft → Typical Floors → MEP Rough-in → Façade → Finishing. Total duration 32 months. Identifies 3-week float on interior fit-out allowing resource reallocation to critical MEP works.
Contractor analyzes delay impact from client design changes. Original critical path shifted due to 45-day variation instruction. Calculator demonstrates 38-day project delay (concurrent delay accounted for), supporting EOT claim per FIDIC Sub-Clause 8.4.
Frequently Asked Questions
Take Your Calculations Further
This calculator reflects the logic built into Arkan's construction management platform.
Last Updated: January 2026
Standards Reference: AACE Recommended Practice 29R-03, PMBOK Schedule Management, Primavera P6 CPM Methodology