Weld Load Capacity Calculator
Estimate the allowable load of a fillet weld from leg size, length and allowable shear. Preliminary, not a design check.
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Estimate the allowable load of a fillet weld from leg size, length and allowable shear. Preliminary, not a design check.
Weld Load Capacity Estimator
Enter your numbers below for an instant estimate.
How It Works
Key concepts behind this calculator
Enter Values
Fill in each field with your own numbers.
Calculate
Results update as you change the inputs.
Review
Read the breakdown and the explanation.
Adjust
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Weld Quick Guide
Typical values for reference.
| Leg mm | Length mm | Stress MPa | kN |
|---|---|---|---|
| 4 | 200 | 120 | 135.8 kN |
| 6 | 200 | 120 | 203.6 kN |
| 8 | 300 | 120 | 407.3 kN |
| 10 | 500 | 120 | 848.5 kN |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Weld Load Capacity Calculator FAQ
Answers to common questions about this calculator.
Multiply throat area by allowable shear stress.
No, it is only a quick estimate.
Capacity = 0.707 x leg x length x allowable shear x number of welds.
It is an estimate based on the inputs you enter. Check real quotes, labels or official guidance for important decisions.