Enter the design pressure (kPa), the outside diameter (mm), and the design factor into the Spade Thickness Calculator. The calculator will evaluate the Spade Thickness.

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## Spade Thickness Formula

The following formula is used to calculate the Spade Thickness.

ST = P*D / (2*F*S)

Variables:

- ST is the Spade Thickness (mm)
- P is the design pressure (kPa)
- D is the outside diameter (mm)
- F is the design factor
- S is the yield strength (kPa)

To calculate the spade thickness, multiply the design pressure by the outside diameter, then divide by the product of 2 times the design factor times the yield strength.

## How to Calculate Spade Thickness?

The following steps outline how to calculate the Spade Thickness.

- First, determine the design pressure (kPa).
- Next, determine the outside diameter (mm).
- Next, determine the design factor.
- Next, gather the formula from above = ST = P*D / (2*F*S).
- Finally, calculate the Spade Thickness.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem:**

Use the following variables as an example problem to test your knowledge.

design pressure (kPa) = 7900

outside diameter (mm) = 250

design factor = .89

ST = P*D / (2*F*S) =** ** ?