Measure around the fattest part of the pumpkin (or "waist") parallel to the ground. This measurement is the circumference of the pumpkin. Note the measurement on the scrap paper.
Lay one end of the measuring tape on the ground by the pumpkin's stem, then take the tape over the pumpkin and then over to the ground again at the blossom end. Do not lay the tape against the contours of the pumpkin to the ground. This is the first over-the-top measurement: Note the measurement on the scrap paper.
Lay one end of the tape on the ground on the pumpkin's fattest side, over the top of the pumpkin and then back down to the ground on the other side. Do not lay the tape against the contours of the pumpkin to the ground. This is the second over-the-top measurement. Note the measurement on the scrap paper.
Add the two over-the-top measurements to the circumference measurement to get your OTT total. Use the calculator, as necessary, and round the total up or down to the nearest whole number.
Check this total number against an Over the Top weight table (see Resources) to determine the approximate weight of your giant pumpkin.