Baseball Bat Size Chart & Calculator
Enter height, weight and age to get a starting bat length and drop weight. Then use the two quick tests below to make sure it actually fits the swing.
A starting point, not a rule. Every bat brand feels a little different, so check the fit with the tests below before you buy.
Two tests that beat any chart
- Arm extension test. Hold the bat by the knob in the hand you write with and stretch your arm straight out to the side. If the barrel sags before about 20 seconds, the bat is too heavy right now.
- Reach test. Stand the bat up next to the leg with the knob pointing up. The knob should reach about the middle of the palm when the arm hangs straight down. Past the wrist means it is probably too long.
Bat length by height and weight
Find the player's height across the top and weight down the side. Blank cells are body types that are rare at that height, so use the closest filled cell.
| Weight | 3'0"–3'4" | 3'5"–3'8" | 3'9"–4'0" | 4'1"–4'4" | 4'5"–4'8" | 4'9"–5'0" | 5'1"–5'4" | 5'5"–5'8" | 5'9"–6'0" | 6'1"+ |
|---|---|---|---|---|---|---|---|---|---|---|
| Under 60 lbs | 26 | 27 | 28 | 28 | 29 | – | – | – | – | – |
| 61–70 lbs | 27 | 27 | 28 | 28 | 30 | 30 | – | – | – | – |
| 71–80 lbs | – | 28 | 28 | 28 | 30 | 30 | 31 | – | – | – |
| 81–90 lbs | – | 28 | 29 | 29 | 30 | 30 | 31 | 32 | – | – |
| 91–100 lbs | – | 28 | 29 | 30 | 30 | 31 | 31 | 32 | – | – |
| 101–110 lbs | – | 29 | 29 | 30 | 30 | 31 | 31 | 32 | – | – |
| 111–120 lbs | – | 29 | 29 | 30 | 30 | 31 | 31 | 32 | – | – |
| 121–130 lbs | – | 29 | 30 | 30 | 30 | 31 | 32 | 33 | 33 | – |
| 131–140 lbs | – | 29 | 30 | 30 | 31 | 31 | 32 | 33 | 33 | – |
| 141–150 lbs | – | – | 30 | 31 | 31 | 31 | 32 | 33 | 33 | – |
| 151–160 lbs | – | – | 30 | 31 | 31 | 32 | 32 | 33 | 33 | 33 |
| 161–170 lbs | – | – | – | 31 | 31 | 32 | 32 | 33 | 33 | 34 |
| 171–180 lbs | – | – | – | – | – | 32 | 33 | 33 | 34 | 34 |
| 180+ lbs | – | – | – | – | – | – | 33 | 33 | 34 | 34 |
All lengths in inches. The chart is built from the height-and-weight sizing grid that bat retailers have used for years (for example, Academy Sports' bat size chart).
Drop weight by age
Drop is weight in ounces minus length in inches. A 30-inch, 20-ounce bat is a -10. Bigger number after the minus sign means a lighter bat.
| Age | Typical length | Typical drop |
|---|---|---|
| 8 and under | 26–28 in | -11 to -13 |
| 8–10 | 28–30 in | -10 to -12 |
| 11–12 | 29–32 in | -8 to -11 |
| 13–14 | 31–32 in | -5 to -8 |
| 15+ (high school) | 32–34 in | -3 (BBCOR) |
Check the league rules before you buy
The drop is only half of it. Leagues also require a certification stamp on the bat, and the right stamp depends on where your player plays:
- Little League and most rec leagues: a bat with the USA Baseball stamp.
- Most travel ball: a USSSA stamp. Check your tournament's rules, because some older age groups require BBCOR.
- High school and college: a BBCOR-certified -3 bat.
Rules change from season to season. Your league or tournament's rulebook is the final word.
Too much bat shows up in the swing
A bat that is too long or heavy rarely looks wrong in the store. It shows up as a long, looping path and contact that's late and deep in the zone. If you're not sure, film one swing with the new bat and one with the old. RipIQ scores Bat Path and Contact Point on each, so you can see if the bigger bat is costing you.
Is the new bat helping or hurting?
Record a side-view swing and RipIQ scores six mechanics in seconds, then recommends drills for what needs work.
Analyze My Swing Free3 free analyses. No account needed.