How to Use the GPC Pumpkin Weight Calculator and Leader Board

Updated

The Great Pumpkin Commonwealth (GPC) offers two tools for giant-fruit growers on gpc1.org: a 2025 AG Pumpkin/Squash Weight Calculator (available in both imperial and metric versions, with downloadable charts) and a GPC Leader Board that shows near real-time weigh-off results as data is uploaded from each site into bigpumpkins.com. Use the calculator to estimate a fruit's weight from its measurements before or during a weigh-off; use the Leader Board to check GPC stats and follow results during the weigh-off season.

Using the 2025 AG Pumpkin/Squash Weight Calculator

The calculator is credited to Scott Holub and is described on the site as "the latest and greatest." It is built for Atlantic Giant (AG) pumpkins and squash.

Two versions are provided:

Version What you get
Imperial (LBS) Online calculator plus a downloadable LBS. chart
Metric Online calculator plus a downloadable METRIC chart

How to use it:

  1. Go to the calculator page linked from the GPC homepage ("Click here to go to Calculator").
  2. Measure your fruit using the standard circumference/end-to-end/side-to-side measurements the calculator expects.
  3. Enter the measurements into the online calculator to get an estimated weight.
  4. If you prefer to work offline or want a reference, download the corresponding LBS. or METRIC chart.

Expected result: an estimated weight for your AG pumpkin or squash based on its dimensions. Note that this is an estimate — official weights come from an actual weigh-off.

Common sticking point: make sure you are using the correct unit version. If you measure in centimeters but enter values into the LBS. calculator (or vice versa), your estimate will be wrong. Pick the metric calculator and metric chart together, or the imperial pair together.

Checking the GPC Leader Board

The Leader Board is described as "your best source for checking GPC stats." During the weigh-off season, it shows near real-time results as data is uploaded from each weigh-off site into bigpumpkins.com.

How to use it:

  1. From the GPC homepage, follow the "Check Out the New GPC Leader Board — Click Here!" link.
  2. Browse current standings and results.
  3. During weigh-off season, check back as new data is uploaded from each site — results appear close to real time rather than only at the end of the season.

Expected result: up-to-date GPC statistics and rankings, useful for tracking how growers and entries are performing across weigh-off sites.

Related GPC Resources Worth Knowing

  • Grower education: The GPC links to grower creators and channels where the giant-growing community shares tips, techniques, and behind-the-scenes insights, and where you can ask questions.
  • Grower's advice and trusted pumpkin sites: The homepage includes a section pointing to grower advice and pumpkin sites the GPC considers trustworthy, including "Andy Wolf's - Pumpkins 101."
  • Tomato weigh-off from early entry: The GPC has created a way to record and recognize tomato weights harvested before the annual weigh-off season. Rules are on page 32 of the GPC Rules and Handbook, with a separate entry link for tomatoes.
  • Judge training: A judge training module is available, aimed at ensuring fruit is judged fairly and consistently at GPC weigh-offs.
  • Newsletter: The quarterly GPC newsletter, Common Ground, is available on the GPC website upon publication, with archived issues also linked.

Quick Answers

Do I need an account to use the calculator or Leader Board? The page evidence does not state a login requirement for either tool, so this cannot be confirmed either way — check the linked pages directly.

Is the calculator the same as an official weigh-off result? No. The calculator produces an estimate from measurements; official weights are determined at a GPC weigh-off.

Where does Leader Board data come from? Data is uploaded from each weigh-off site into bigpumpkins.com, which feeds the near real-time results during the season.