The following striped bass length to weight chart is based on historic catch records for striped bass in New England. You can expect striped bass weights during the spring to be closer to the average—or just below—and striped bass weights during the fall nearer the maximum.
The following chart includes minimum, average, and maximum weights for stripers based on age and length. Spring stripers will typically be in the minimum weight range. Fall stripers—especially females—will be nearer the maximum weight listed. A fully mature 20 year old female striped bass may reach as much as 80lbs.
| Length | Age | Min Weight | Avg Weight | Max Weight |
|---|---|---|---|---|
| 12in (30.5cm) | 1 yr | 1lb | 1lb | 1lb |
| 13in (33cm) | 1 yr | 1lb | 1lb 8 oz | 2 lb |
| 14in (35.6cm) | 2 yrs | 2 lb | 2 lb 5 oz | 2 lb 8 oz |
| 15in (38cm) | 2 yrs | 2 lb | 2 lb 8 oz | 3 lb |
| 16in (40.5cm) | 2 yrs | 2 lb 8 oz | 3 lb | 3 lb 8 oz |
| 17in (43cm) | 3 yrs | 2 lb 13 oz | 3 lb 8 oz | 4 lb |
| 18in (45.5cm) | 3 yrs | 3 lb | 4 lb | 4 lb 8 oz |
| 19in (48.5cm) | 3 yrs | 3 lb 8 oz | 4 lb 5 oz | 5 lb |
| 20in (51cm) | 3 yrs | 4 lb | 4 lb 13 oz | 5 lb 8 oz |
| 21in (53.5cm) | 4 yrs | 4 lb 5 oz | 5 lb | 6 lb |
| 22in (56cm) | 4 yrs | 4 lb 13 oz | 5 lb 13 oz | 6 lb 13 oz |
| 23in (58.5cm) | 4 yrs | 5 lb | 6 lb 5 oz | 7 lb 8 oz |
| 24in (61cm) | 5 yrs | 6 lb | 7 lb | 8 lb 5 oz |
| 25in (63.5cm) | 5 yrs | 6 lb 5 oz | 7 lb 13 oz | 8 lb 13 oz |
| 26in (66cm) | 6 yrs | 7 lb | 8 lb 8 oz | 10 lb |
| 27in (69cm) | 6 yrs | 8 lb | 9 lb 13 oz | 11 lb |
| 28in (71cm) | 6 yrs | 8 lb 13 oz | 10 lb 5 oz | 12 lb |
| 29in (73.5cm) | 7 yrs | 9 lb 11 oz | 11 lb | 12 lb 14 oz |
| 30in (76cm) | 7 yrs | 10 lb 5 oz | 12 lb 5 oz | 14 lb |
| 31in (78.5cm) | 8 yrs | 11 lb | 13 lb | 15 lb |
| 32in (81.5cm) | 8 yrs | 12 lb | 14 lb 8 oz | 16 lb 11 oz |
| 33in (84cm) | 9 yrs | 13 lb | 15 lb 13 oz | 17 lb 13 oz |
| 34in (86.5cm) | 9 yrs | 14 lb | 16 lb 8 oz | 19 lb |
| 35in (89cm) | 10 yrs | 15 lb 8 oz | 18 lb | 20 lb 8 oz |
| 36in (91.5cm) | 10 yrs | 16 lb 13 oz | 19 lb 8 oz | 22 lb |
| 37in (94cm) | 11 yrs | 17 lb 8 oz | 20 lb 11 oz | 23 lb 8 oz |
| 38in (96.5cm) | 12 yrs | 19 lb | 22 lb | 25 lb 8 oz |
| 39in (99cm) | 12 yrs | 20 lb 11 oz | 24 lb 8 oz | 27.2 |
| 40in (101.5cm) | 13 yrs | 22 lb | 26 lb | 29 lb 8 oz |
| 41in (104cm) | 13 yrs | 23 lb | 27 lb 5 oz | 31 lb |
| 42in (106.5cm) | 14 yrs | 25 lb | 29 lb 11 oz | 33 lb 8 oz |
| 43in (109cm) | 14 yrs | 27 lb | 32 lb | 36 lb 5 oz |
| 44in (112cm) | 15 yrs | 29 lb | 34 lb | 39 lb |
| 45in (114cm) | 15 yrs | 30 lb 8 oz | 36 lb | 41 lb |
| 46in (117cm) | 16 yrs | 32 lb 8 oz | 38 lb 11 oz | 44 lb |
| 47in (119.rcm) | 16 yrs | 35 lb | 42 lb | 47 lb 8 oz |
| 48in (122cm) | 17 yrs | 37 lb | 44 lb | 51 lb |
| 49in (124.5cm) | 17 yrs | 39 lb | 47 lb | 54 lb |
| 50in (127cm) | 18 yrs | 42 lb | 50 lb | 58 lb |
| 51in (129.5cm) | 18 yrs | 45 lb | 55 lb | 62 lb |
| 52in (132cm) | 19 yrs | 47 lb | 58 lb | 65 lb |
| 53in (134.5cm) | 19 yrs | 49 lb | 60 lb | 68 lb |
| 54in (137cm) | 20 yrs | 52 lb | 64 lb | 73 lb |
| 55in (139.5cm) | 20 yrs | 56 lb | 70 lb | 80 lb |
The approximate weight of striped bass can be calculated using the following formula:
- (length x length x length)/2,200
Using this formula the approximate weight of a 30-inch striped bass is approximately 12 pounds (30″ x 30″ x 30″)/2,200 = 12.3 pounds, which is very close to the figure of 12lbs 5oz for the average weight of a striped bass reported in the weight chart above.
If the bass in the region you’re fishing are on the plumb side, you can adjust the divisor down from 2,200 to 1,950 to get a better weight approximation. Hence, a plump 30-inch striped bass is going to weigh approximately 14 pounds (30″ x 30″ x 30″)/1,950 = 13.8 pounds, which is nearly spot on with the figure of 14lbs reported for the max weight of a 30-inch striper.
Alternative formulas for estimating weight include (length x length x girth)/1,200 and (length x girth x girth)/800. Using girth as a measurement for estimating weight tends to be a little more accurate than using length alone as girth accounts for general differences in regional fish populations.
As you can see, these formulas provide a close approximation of actual weight of a striped bass. Using an approximation formula, when exact weight isn’t a necessity, allows you to closely estimate weight of the bass without using a portable scale that may injure the fish.
Measuring Length and Girth
Estimating the weight of a striped bass requires accurate length and girth measurements. For estimating weight, always use the total length (TL) measurement as shown in the diagram below. Total length is measured from the tip of the snout to the tip of the tail.
Girth is determined by measuring the circumference of the bass at the thickest point of the midsection, which is often directly in front of, or between, the dorsal fins.
