Enter the length, width, depth, cost per unit volume, and efficiency into the calculator to estimate welding cost based on weld volume.
Welding Cost Formula
The following formula is used to estimate welding cost from weld volume (using a simple rectangular volume approximation):
WC = (L * W * D * C) / (E/100)
Variables:
- WC is the estimated welding cost ($)
- L is the length of the weld
- W is the average width of the weld bead (or an equivalent width used for estimation)
- D is the average depth/thickness used for the weld-volume estimate (or an equivalent depth used for estimation)
- C is the cost per unit volume (for deposited weld volume at 100% efficiency)
- E is the welding efficiency in percent (%) (for example, 80 for 80%)
To estimate welding cost, multiply the length, width, and depth to estimate a weld volume. Then multiply the result by the cost per unit volume. Finally, divide by (E/100) to account for efficiency. Note: real welds often have non-rectangular cross-sections (for example, fillet welds are closer to triangular), so this method is an approximation unless your W and D represent an equivalent rectangular cross-section.
What is a Welding Cost (Volume-Based Estimate)?
“Welding cost” can mean the total cost of a welding job (labor, materials, equipment, consumables, overhead, etc.). This page’s calculator specifically estimates cost from the amount of weld volume you expect to deposit, using a user-supplied cost per unit volume and an efficiency factor. Depending on how you choose cost per unit volume, your estimate may represent only filler/consumables, or it may bundle labor, equipment time, and overhead into a single $/volume rate.
How to Calculate Welding Cost?
The following steps outline how to calculate the Welding Cost:
- First, determine the weld length (L).
- Next, determine the weld’s average width (W) used for the estimate.
- Next, determine the weld’s average depth/thickness (D) used for the estimate.
- Next, determine the cost per unit volume (C) for the weld (for example, $/cm³, $/in³, $/m³, or $/ft³).
- Next, determine the welding efficiency (E) as a percentage (%).
- After inserting the variables, calculate the Welding Cost using WC = (L × W × D × C) / (E/100), then check your answer with the calculator above.
Example Problem:
Use the following variables as an example problem to test your knowledge.
Length (L) = 100 cm
Width (W) = 1 cm
Depth (D) = 0.5 cm
Cost per unit volume (C) = $0.10/cm³, Efficiency (E) = 80% ⇒ WC = (100 × 1 × 0.5 × 0.10) / (80/100) = $6.25
