Anvil Size Calculator

Determine the recommended anvil weight based on the heaviest workpiece you plan to forge and the type of work you do.

Max Workpiece Weight

lbs

Work Type

Tab to move between fields

Recommended Anvil Weight

120 lbs

≈ 5 car tires

Minimum Usable Weight84 lbs

Ideal Weight144 lbs

Approx. Face Length16.8 in

Approx. Face Width4.8 in

Work CategoryMedium (knives, tools)

How to Use This Calculator

Enter the maximum workpiece weight — the heaviest piece of metal you plan to forge.
Select the work type: Light (jewelry/tongs), Medium (knives/tools), or Heavy (axes/tooling).
Review Recommended Anvil Weight and Minimum Usable Weight to choose the right anvil size.
The ideal 50:1 mass ratio for heavy work means heavier workpieces require a proportionally heavier anvil.
Use the weight range bar chart to compare minimum, recommended, and ideal options side by side.

How the result changes with Max Workpiece Weight

Max Workpiece Weight: The weight of the heaviest piece you typically forge. For knifemaking this is usually 1-5 lbs; for tooling 5-15 lbs.
Work Type: Heavier work requires a higher anvil-to-workpiece ratio for efficient energy transfer.

Identify Input Parameters
Max Workpiece Weight = 3, Work Type = 2 = 2 input(s) provided
Calculate Recommended Anvil Weight
Recommended Anvil Weight
120 = 120
Calculate Minimum Usable Weight
Minimum Usable Weight
84 = 84
Calculate Ideal Weight
Ideal Weight
144 = 144

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