Drop Weight
DropThe bat's length in inches minus its weight in ounces, written as a negative number - a 30-inch bat weighing 20 ounces is a drop 10.
Drop weight is a single number describing how heavy a bat is relative to its length. Subtract the weight in ounces from the length in inches: a 31-inch, 21-ounce bat is a drop 10, usually written -10.
A bigger drop number means a lighter bat for its length, which is easier to swing quickly. Youth bats commonly run in the -10 to -12 range, and the permitted drop gets more restrictive as players move up - at the high school level bats are typically limited to -3, which is a far heavier bat for the same length.
The practical point for a parent: length and drop together decide whether a bat is both legal and swingable. A bat the right length with the wrong drop is either illegal for the division or too heavy to swing properly, and neither is obvious from looking at it.
Permitted drops vary by league and division, so confirm with your league before buying rather than after.
What does drop 10 mean on a baseball bat?
The bat's weight in ounces is ten less than its length in inches - a 30-inch drop 10 bat weighs 20 ounces. A larger drop number means a lighter bat for its length.
How do you calculate bat drop weight?
Subtract the weight in ounces from the length in inches. A 32-inch bat weighing 22 ounces is a drop 10, written -10.
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