15 oz = 425.25 grams = ~444 ml = 1.875 cups = 0.425 kg. 15 ounces sits just under one pound — a weight that shows up in your kitchen, your gym bag, and even inside your own body.
In this article, we cover 6 real-world objects that weigh 15 oz — including things competitors never mentioned.
How Much Is 15 Ounces?
Before diving in, let’s clear up a common confusion. Weight ounces and fluid ounces are not the same thing. Weight ounces measure mass. Fluid ounces measure volume.
15 weight ounces = 425.25 grams — calculated by multiplying 15 × 28.35 g. And 15 fluid ounces of water = ~444 ml, which equals about 0.444 kg. The number changes depending on the liquid’s density.
6 Most Common Things That Weigh About 15 Ounces
A FIFA-Regulation Soccer Ball
According to FIFA’s Law of the Game, Rule 2, a regulation soccer ball must weigh between 14 and 16 ounces — placing 15 oz right at the official midpoint.
That weight isn’t random. It’s engineered for balance between power and agility — heavy enough to travel far on a long pass, light enough for quick footwork and rapid dribbling.
A Ready-to-Serve Can of Soup
A standard Campbell’s Condensed Tomato Soup can weighs around 12 oz. But ready-to-serve and larger-format cans hit exactly 15 oz — a size most Americans have held in their hand without realizing it.
Key distinction no competitor covered: The “15 oz” on a can label refers to net weight — the contents only. The metal can itself adds extra weight on top. So when you’re shipping or weighing a full can, expect it to be slightly heavier than the label states.
An Adult Human Heart (At Its Upper Range)
The average adult human heart weighs about 11 ounces. But in endurance athletes — marathon runners, cyclists, professional swimmers — the heart can grow to 15 ounces or more.
This happens through a process called cardiac hypertrophy — where intense physical training causes the heart muscle to thicken and enlarge. It pumps between 10 and 20 liters of blood per minute without ever stopping.
A Rugby Union Ball
Official rugby union ball weight falls between 14.5 and 16.2 ounces — designed to handle scrums, tackles, wet weather, and full-contact play at elite level.
Something no competitor explained: Within that weight range, ball weight affects gameplay strategy. A ball at the heavier end (~16 oz) suits forward-dominated, ground-based play. A ball at the lighter end (~14.5 oz) benefits backs who rely on speed and handling.
Two Cups of Butter
In baking, 2 cups of butter = exactly 15 ounces. This confuses home bakers constantly because butter is a solid fat — its density means volume and weight don’t match the way they do with water or milk.
Practical tip: whether you’re making flaky pie crusts, chocolate chip cookies, or buttercream frosting, weighing butter at 15 oz is more accurate than measuring by volume.
Nuance competitors overlooked: Both salted and unsalted butter weigh the same — the salt content is negligible and doesn’t affect measurement accuracy.
Two Adult Syrian Hamsters
A single adult Syrian hamster (Mesocricetus auratus, also known as the golden hamster) weighs approximately 7 ounces. Two adult hamsters together = ~14 to 15 ounces — a soft, warm, surprisingly precise weight reference.
Remarkable fact competitors left out: Despite weighing only 7 oz each, Syrian hamsters can transport and store up to 900 oz of food in their underground burrows using their cheek pouches.
How Does 15 Ounces Compare to Other Common Weights?
| Item | Weight |
| Baseball (MLB regulation) | ~5.1 oz |
| Hockey Puck (NHL) | ~5.75 oz |
| Billiard Ball (WPA spec) | ~5.75 oz |
| Campbell’s Condensed Soup Can | ~12 oz |
| ✅ 15 oz Object (e.g., Soccer Ball) | 15 oz |
| NBA Basketball (Spalding, Size 7) | ~22 oz |
| 1 Liter of Water | ~35.27 oz |
15 oz sits in a distinct middle range. It’s three times heavier than a baseball, roughly equal to a soccer ball, and nearly half the weight of an NBA basketball.
Other Interesting Measurements:
Question’s
What is 15 oz in kilos?
15 oz = 0.425 kilograms. To convert ounces to kilograms, multiply by 0.0283495. So 15 × 0.0283495 = 0.4252 kg.
How many grams is 15 oz?
15 oz = 425.25 grams. One ounce equals 28.35 grams, so 15 × 28.35 = 425.25 g. This is a critical conversion for cooking and nutrition labeling in the US.
What size is a 15 oz can?
A standard 15 oz can is typically classified as a #300 can in the US food industry. It measures approximately 4 inches tall and 3 inches in diameter — the size used for beans, tomatoes, chickpeas, and many soups.
How much is 15 oz in cups?
15 oz = 1.875 cups, or just under 2 cups. When a recipe calls for nearly 2 cups of a liquid ingredient, 15 fl oz is your exact measurement. This is especially important in baking where precision drives texture and rise.
How many kg is 15 fl oz?
For water, 15 fluid ounces = 444 ml = approximately 0.444 kg. However, this changes with liquid density. Milk is slightly heavier than water, while oil is lighter. Always account for the specific liquid when converting fluid oz to kg.
Is a 15 oz can weight or volume?
It is a net weight measurement — not volume. The “15 oz” printed on a food can refers to the weight of the contents inside, measured in avoirdupois ounces. The physical can itself adds additional weight. This distinction matters for shipping, cooking, and nutritional tracking.
How big is a 15 ounce cup?
A 15 oz cup is larger than a standard coffee mug, which holds 8 to 12 oz. It holds roughly 1.875 cups of liquid — making it a popular size for oversized coffee mugs, travel tumblers, and large diner-style cups.
How many kg is a healthy baby?
A healthy newborn baby typically weighs between 2.5 kg and 4 kg (roughly 88 oz to 141 oz) at birth, according to the World Health Organization (WHO). At 15 oz (0.425 kg), an object weighs far less than even the smallest healthy newborn.
How much do 12 cans of Coke weigh?
A standard 12 fl oz can of Coca-Cola weighs approximately 13.5 oz when full (liquid + aluminum can). Twelve cans together weigh roughly 162 oz — about 10.1 pounds or 4.6 kg. That’s the weight of a small dumbbell or a large watermelon.
Conclusion
15 ounces is more common in daily life than most people realize. From a FIFA soccer ball to two fluffy Syrian hamsters, from a can of soup to the beating muscle in your chest — this weight shows up everywhere.
Knowing how heavy 15 oz is helps you cook more accurately, ship packages confidently, and make smarter product choices. It’s a small number with a surprisingly big presence.
Haru, the dedicated Admin of candimension.com, curates an informational blog on Can Dimension. With passion and expertise, Haru delivers insightful articles to educate and empower readers on this fascinating niche.
