Izod and Charpy are impact strength measurement tests that produce a value that represents the amount of force an individual material can withstand. Both tests are widely used and accepted in product literature. If you need to convert an Izod value to a Charpy value, you can do so with a standard conversion formula.

Obtain your Izod value.

Multiply the Izod value by 2.738223.

Record your new value. This is the Charpy value obtained by multiplying Izod by the Charpy constant.