How Heavy Is a Watermelon?
a Watermelon weighs about
4.52 kg (9.96 lb)
- a bowling ball7.26 kg
heaviest ball allowed in tenpin bowling (16 lb); USBC sets no minimum weight
- a watermelon4.52 kg
one whole watermelon, 15 inches long by 7-1/2 inches in diameter
- a domestic cat4.5 kg
adult domestic cat (Felis catus); males larger; range 4.1–5.4 kg
- a gallon of water3.78 kg
1 US gallon (3.785 412 L) of pure water at 4 °C
- You
Open full comparison → to add more objects on one scale.
Put it in perspective
- About 1.0× a domestic cat
- About 1.2× a gallon of water
- About 1.6× a bowling ball
Why weights differ
USDA's reference melon is a modest 15-inch fruit. Seedless varieties and competition giants weigh far more, so a single number only describes a typical supermarket melon.
Sources
[1] U.S. Department of Agriculture, FoodData Central
FoodData Central: Watermelon, raw (FDC 167765)Government agency
“"gramWeight":4518 ... "modifier":"melon (15\" long x 7-1/2\" dia)"”
Value as published: 1 watermelon (15" long x 7-1/2" dia) = 4518 g · accessed 2026-11-11.
Last updated 2026-11-11.Report a correction (please include a source link).
Related objects
- a gallon of milk3.9 kg (8.61 lb)
- a gallon of water3.78 kg (8.34 lb)
- a 5 lb bag of flour2.268 kg (5 lb)
- 5 gallons of water18.9 kg (41.7 lb)
- a liter of water1 kg (2.2 lb)
- a loaf of bread0.567 kg (1.25 lb)
Frequently asked questions
How much does a watermelon weigh?
a Watermelon weighs about 4.52 kg (9.96 lb) — one whole watermelon, 15 inches long by 7-1/2 inches in diameter.
How much is a watermelon in pounds and ounces?
9.96 lb, which is 159 oz. In metric terms: 4.52 kg.
Is a watermelon heavier than a domestic cat?
Yes. a Watermelon weighs about 4.52 kg (9.96 lb), while a domestic cat is about 4.5 kg (9.92 lb) — roughly 1.0×.
Why do sources give different weights?
USDA's reference melon is a modest 15-inch fruit. Seedless varieties and competition giants weigh far more, so a single number only describes a typical supermarket melon.
Where does this number come from?
Every source is listed at the bottom of this page with publisher, link, access date and a verbatim quote. Numbers are only published when a qualifying source can be verified.