Evaluate settlement against allowable design thresholds easily. Track differential checks, margins, exports, and supporting notes. Built for quick reviews, records, and better site decisions.
Submit the form to generate the comparison graph.
This calculator helps construction teams review serviceability settlement limits before handover, during monitoring, or while checking design assumptions. It compares actual or predicted movement against project allowances and then highlights the governing ratio.
Total settlement and differential settlement do not control performance in the same way. A structure may accept moderate uniform settlement, yet still show distress if differential movement becomes too large. That is why both checks appear together.
The tool also converts differential settlement into a slope expression using the entered foundation length. This is useful when site teams prefer a movement ratio such as 1:1000 or 1:1500 for discussions and reports.
A warning limit is included for early review. When utilization stays below the allowable limit but rises above the warning threshold, the result shows a warning instead of a simple pass. This supports timely engineering judgment and better record keeping.
Total Utilization (%): (Actual Total Settlement / Allowable Total Settlement) × 100
Differential Utilization (%): (Actual Differential Settlement / Allowable Differential Settlement) × 100
Remaining Total Margin (mm): Allowable Total Settlement − Actual Total Settlement
Remaining Differential Margin (mm): Allowable Differential Settlement − Actual Differential Settlement
Actual Slope: Actual Differential Settlement / Foundation Length in mm
Allowable Slope: Allowable Differential Settlement / Foundation Length in mm
Governing Utilization (%): Maximum of total utilization and differential utilization
Pass Rule: Actual total and actual differential values must both remain at or below their allowable values.
| Project | Allowable Total (mm) | Actual Total (mm) | Allowable Differential (mm) | Actual Differential (mm) | Length (m) | Warning Limit (%) | Governing Utilization (%) | Status |
|---|---|---|---|---|---|---|---|---|
| Warehouse Block A | 30.000 | 22.000 | 18.000 | 10.000 | 18.000 | 80.00 | 73.33 | PASS |
| Office Podium | 25.000 | 23.500 | 12.000 | 11.200 | 14.000 | 80.00 | 93.33 | PASS WITH WARNING |
| Retaining Wall Base | 20.000 | 24.000 | 10.000 | 8.500 | 10.000 | 80.00 | 120.00 | FAIL |
It checks whether actual or predicted settlement stays within allowable total and differential movement limits. It also reports governing utilization, margins, and a slope-based view for quick engineering review.
Total settlement shows overall vertical movement. Differential settlement shows uneven movement between points. Uneven movement often drives cracking, alignment issues, and serviceability concerns even when total settlement looks acceptable.
The warning limit creates an early review threshold. A result can still pass the allowable check, yet trigger a warning when utilization is already close to the project limit.
The overall result becomes a fail. Both total settlement and differential settlement must remain within their allowable values for the final status to pass.
The slope ratio converts differential movement into a simple expression like 1:1000. This makes discussions easier during field reviews, design meetings, and serviceability reporting.
Yes. The calculator works for design-stage estimates, staged construction reviews, or monitoring results. Just keep the source of the movement values clear in your records.
No. A pass only shows the entered values are within the selected limits. Structural behavior, soil variability, finishes, and adjacent elements may still require engineering review.
Yes, if the project team already has allowable movement criteria. The tool is general and depends on the quality of the chosen limits and measured or predicted settlement inputs.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.