Pumpkin Weight Calculator (OTT)

Competitive giant pumpkins are often weighed with the Over-The-Top (OTT) method: measure maximum circumference plus stem-to-blossom end length plus perpendicular side-to-side width, all in inches, then apply the Great Pumpkin Commonwealth regression formula to estimate weight in pounds.

OTT is a field estimate for growers and festival weigh-offs — not a substitute for certified scales. Shape, wall thickness, and hollow seed cavities introduce error, especially on irregular fruit.

Example: 100 in circumference, 80 in stem-to-blossom, and 75 in side-to-side sums to 255 OTT inches — the formula returns a positive weight in pounds suitable for comparing against last year's personal best.

Metric mode accepts centimeters and converts to inches internally before the same formula runs — toggle units to remap all three measurement fields at once.

Measure on the ground with a flexible tape for circumference at the widest point; keep the tape level. Photograph measurements for contest paperwork when organizers require evidence.

Carving pumpkins and pie types are far lighter per OTT inch than dense giants bred for weight — interpret results as giant-pumpkin context, not your porch jack-o'-lantern.

Limits: pure geometry estimate — no affiliation with any weigh-off organization. Certified events use official scales; this page is for home and farm planning only.