# How to Calculate and Solve for Part Shrinkage Ratio | Polymer & Textile

The image above represents part shrinkage ratio.

To compute for part shrinkage ratio, two essential parameters are needed and these parameters are mold dimension (DM) and part dimension (DP).

The formula for calculating part shrinkage ratio:

RPS = DM – DP / DM

Where:

RPS = Part Shrinkage Ratio
DM = Mold Dimension
DP = Part Dimension

Let’s solve an example;
Find the part shrinkage ratio when the mold dimension is 8 and the part dimension is 10.

This implies that;

DM = Mold Dimension = 8
DP = Part Dimension = 10

RPS = DM – DP / DM
RPS = 8 – 10 / 8
RPS = -2 / 8
RPS = -0.25

Therefore, the part shrinkage ratio is -0.25.

Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the part shrinkage ratio.

To get the answer and workings of the part shrinkage ratio using the Nickzom Calculator – The Calculator Encyclopedia. First, you need to obtain the app.

You can get this app via any of these means:

To get access to the professional version via web, you need to register and subscribe for NGN 1,500 per annum to have utter access to all functionalities.
You can also try the demo version via https://www.nickzom.org/calculator