S-Curve Generator
Generate project S-curves for cash flow and progress planning. Supports early start, late start, and bell curve distributions with interactive charts and data export.
AED 50,000,000
Standard S-curve with peak in middle
| Month | Monthly | Cumulative | % |
|---|---|---|---|
| Month 1 | AED 961,988 | AED 961,988 | 1.9% |
| Month 2 | 2.1M | 3.1M | 6.1% |
| Month 3 | 3.9M | 6.9M | 13.8% |
| Month 4 | 6.0M | 12.9M | 25.8% |
| Month 5 | 7.7M | 20.6M | 41.2% |
| Month 6 | 8.4M | 29.0M | 58.1% |
| Month 7 | 7.7M | 36.8M | 73.5% |
| Month 8 | 6.0M | 42.7M | 85.4% |
| Month 9 | 3.9M | 46.6M | 93.1% |
| Month 10 | 2.1M | 48.7M | 97.3% |
| Month 11 | AED 961,988 | 49.6M | 99.3% |
| Month 12 | AED 370,236 | 50.0M | 100.0% |
Early Start (Front-loaded)
Higher mobilization costs, faster ramp-up
Late Start (Back-loaded)
Delayed mobilization, back-loaded finishing works
Linear
Constant rate of expenditure throughout project
Bell Curve (Standard S)
Typical construction profile with peak at midpoint
Duration
12
Total Value
50.0M
Peak Month
Month 6
Cumulative planned value over project duration
Planned monthly expenditure
Average Monthly
4.2M
Peak Monthly Value
8.4M
50% Progress At
Month 6
Final Value
50.0M
Notes:
- S-curve represents planned value baseline
- Compare actual progress against this curve for variance analysis
- Early/Late start affects cash flow timing
- Bell curve is typical for standard construction projects
- Use for earned value management (EVM) baseline
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 S-Curve Generator helps project managers and planners create progress and cash flow curves for construction projects across the UAE and Gulf. Generate baseline S-curves using early start, late start, or bell curve distributions. Useful for project planning, progress tracking, earned value comparisons, and payment forecasting. The monthly table can be copied into a spreadsheet; the tool does not export files.
When to Use This Calculator
- Creating baseline progress curves for project planning
- Forecasting monthly cash flow requirements
- Setting up earned value management baselines
- Comparing actual progress against planned curves
- Preparing progress reports for client meetings
How to Use This Calculator
Enter Project Value
Input total contract value and project duration in months.
Select Distribution
Choose early start, late start, or bell curve distribution pattern.
Generate Curve
View the S-curve with monthly and cumulative values and percentages, and copy the table if you need it in a spreadsheet.
Typical Scenarios in UAE & Gulf Projects
A 36-month tower project valued at AED 500M. With the bell curve distribution, the generator gives about 4.8% cumulative by month 6, 21.8% by month 12, 52.7% by month 18 and 82.0% by month 24, leaving 18% for the final 12 months. The peak month is month 18 at about AED 28.1M. This is a starting baseline for monthly progress and cash flow forecasts.
A 24-month road project uses the early start distribution to front-load earthworks. The generator gives about 43.0% cumulative by month 6 and 54.7% by month 8, with the largest monthly value in month 1, which helps plan early equipment and material procurement.
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: S-curve methodology aligned with PMI PMBOK and AACE standards