Measuring a circle is easy if you have a set of calipers large enough. Since most calipers only measure up to 6″, larger items such as a bucket are difficult to measure accurately.
This quick and easy method has saved me tons of time.
- Framing square
- Speed square
- 3 Clamps
- Tape measure
- Clamp the framing square to a flat work table.
- Flip the circle (or bucket over) and slide it into the corner of the framing square.
- Slide the speed square up against the side of the bucket and clamp it in place.
Too much pressure against the bucket will deform it and skew your measurement.
- Remove the bucket and measure the remaining gap between the squares.