How to Determine Transom Angle | Measuring the Transom Angle (Degrees)

Using a standard carpenter's square ruler, slide the long side of the ruler (24") under the boat at the keel point. Slide forward until the short side of the rule (16") touches the transom straight up. Measure the distance from the keel point to the inside corner of carpenter’s square ruler (see sketch). Each 1/4" is equal to 1° degree. Example: 3” equal to 12? degrees.