Model crane capacity against load, radius, and setup. Compare net limits, deductions, and utilization quickly. Generate practical lift summaries for planning, review, and reporting.
The page uses a single stacked content flow. The calculator form below switches to three columns on large screens, two on tablets, and one on mobile.
| Lift ID | Boom (m) | Radius (m) | Chart Capacity (t) | Dynamic Load (t) | Adjusted Capacity (t) | Utilization | Status |
|---|---|---|---|---|---|---|---|
| L-101 | 28.00 | 10.00 | 22.00 | 11.44 | 18.47 | 61.94% | Within planning limit |
| L-102 | 32.00 | 12.00 | 18.00 | 12.87 | 14.94 | 86.15% | Above planning limit |
| L-103 | 36.00 | 14.00 | 15.50 | 13.09 | 12.20 | 107.30% | Over adjusted chart |
| L-104 | 24.00 | 8.50 | 30.00 | 14.85 | 24.93 | 59.57% | Within planning limit |
1. Gross Load
Gross Load = Hook Load + Rigging Weight + Hook Block or Attachment Weight
2. Dynamic Load
Dynamic Load = Gross Load × (1 + Dynamic Allowance ÷ 100)
3. Interpolated Chart Capacity
Chart Capacity = Lower Capacity + ((Actual Radius − Lower Radius) ÷ (Upper Radius − Lower Radius)) × (Upper Capacity − Lower Capacity)
4. Adjusted Capacity
Adjusted Capacity = Chart Capacity × Outrigger Factor × Direction Factor × Wind Factor × Setup Factor
5. Planning Capacity
Planning Capacity = Adjusted Capacity × (Planning Limit ÷ 100)
6. Utilization and Margin
Adjusted Utilization = Dynamic Load ÷ Adjusted Capacity × 100
Planning Utilization = Dynamic Load ÷ Planning Capacity × 100
Reserve = Available Capacity − Dynamic Load
It estimates adjusted crane capacity, total lifted load, dynamic demand, utilization percentage, remaining margin, and planning warnings using user-entered chart values and reduction factors.
No. It is a planning aid only. Final lifting limits must always come from the crane maker’s official load chart, operator manual, site method statement, and governing regulations.
Hooks, blocks, slings, spreader bars, and other attachments consume capacity. Ignoring them can understate the true lifted load and create an unsafe utilization result.
Use interpolation when the actual operating radius falls between two chart points and the manual permits interpolation. Do not extrapolate beyond chart boundaries unless the manufacturer explicitly allows it.
Dynamic allowance increases the lifted load to reflect motion, hoisting effects, and handling shock. Higher values create a more conservative planning check.
Wind, imperfect setup, limited outrigger extension, and poor positioning reduce available stability or structural margin. Derating helps reflect these real-world constraints during planning.
Many teams aim below full chart capacity for planning control, often around 75% to 90%, but the acceptable limit depends on manufacturer guidance and project rules.
Only with great caution. Pick-and-carry operations require the correct chart, travel conditions, tire pressure, slope checks, and manufacturer approval for that exact configuration.
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.