Crane Capacity Calculator
Estimate crane lifting capacity at any radius. The rigging team's first check before any lift.
Free · No signup · By the analysts at Blackridge Research · Updated 2026-07-18
Inputs
Results
What this means
Adjust the inputs to calculate.
About the Crane Capacity Calculator
Crane capacity estimation is essential for safe lifting operations.
This calculator provides quick capacity estimates for planning purposes.
Formula
Capacity = (Boom Length × 1000) / (Radius × 2)
- C
- — Capacity (lbs)
- BL
- — Boom Length (ft)
- R
- — Radius (ft)
How to use this calculator
- 1
Enter boom length
The length of the crane's boom in feet.
- 2
Enter radius
The distance from the crane center to the load in feet.
Example calculations
Crane lift planning
A crane with 100 ft boom at 50 ft radius.
Capacity = (100 × 1000) / (50 × 2) = 50,000 lbs.
- Estimated capacity:
- 50,000 lbs
- In tons:
- 25 tons
The crane can lift approximately 25 tons at 50 ft radius.
Interpreting your results
Crane capacity decreases as radius increases.
Always use the manufacturer's load chart for actual lifting operations.
Need the market data behind this calculator?
The Crane Capacity Calculator is only as good as its inputs. Blackridge Research publishes syndicated market reports with vetted market sizes, growth rates, and competitive landscapes across 40+ industries — and builds custom studies when the shelf report doesn't exist.
Industry applications
Business
- Project planning: determine crane requirements.
- Cost estimation: estimate crane costs.
- Safety planning: ensure adequate crane capacity.
Construction
- Lift planning: verify crane capacity for lifts.
- Equipment selection: select appropriate crane size.
- Site layout: position crane for maximum capacity.
Research
- Safety analysis: evaluate lifting risks.
- Feasibility studies: assess crane requirements.
Common mistakes to avoid
-
✗ Using estimates instead of load charts
Always use manufacturer load charts for actual lifts.
-
✗ Ignoring rigging weight
The weight of rigging reduces available load capacity.
Frequently asked questions
›What is the maximum radius for lifting?
It depends on the crane. Each crane has a maximum radius specified in its load chart.
›How does crane capacity vary with radius?
Capacity decreases as the radius increases (inverse relationship).
Glossary
- Crane capacity:
- The maximum load a crane can lift at a given radius.
- Boom:
- The extending arm of a crane.
- Load chart:
- A manufacturer's chart showing crane capacity at various radii.
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