How much does a regulation baseball weigh?
Regulation baseball weighs about 145 g (5.1 oz).
🔋 That's about the weight of 6 AA batteries — or 2 eggs 🥚.
At 145 g, it ranks #5 of 26 in Sports (lightest to heaviest) — heavier than Tennis ball (58 g) and lighter than Regulation ice hockey puck (170 g).
This is a specific, standardized product, so the weight above is an exact figure — not an average across variants.
The same 145 g whether it's lobbed at 60 mph or fired at 105.
Category: Sports
| Grams | 145 g |
|---|---|
| Kilograms | 0.145 kg |
| Ounces | 5.1 oz |
| Pounds | 0.32 lb |
Source: MLB rules: 5-5.25 oz (142-149 g), editorial midpoint 145 g.