If you’ve never seen fish size charts before then have I got something to show you!
Bass weight charts are really handy things to have with you when heading out fishing.
Bass weight by length charts allow you to measure your bass using a ruler and then find out the approximate weight of your bass using the calculations on the chart below.
Think of it as a quick and easy way to turn a measurement of length into weight.
It sure beats carrying a set of scales around with you!
If you don’t have a ruler, many fishing piers provide a fish ruler for you to use so that you know when to keep your catch and when to throw it back. Once you have the length of your fish you can immediately find out its weight by referring to the charts.
These bass size charts are a must have for me when I am out on the water because they keep me in line with the local fishing regulations, and I suggest you take them with you too.
Bass Weight Charts
Below are two bass weight charts, one for smallmouth bass and one for largemouth bass. You can use these charts to estimate the weight of your bass by its length.
Largemouth Bass Weight by Length
Save this largemouth bass chart to your phone so you can easily access it when you need to!
Smallmouth Bass Weight by Length
Because smallmouth bass are typically smaller in size than largemouth bass, there is a different length to weight chart taking into account this size difference. Below is the smallmouth bass weight by length chart.
Keep a copy on your boat or in your tackle box!
Bass Weight by Length Tables
Below is the raw data behind the charts that I provided above. The calculations and relationships between size and weight are based on the average sizes of bass measured across New York State.
Your local bass sizes may differ slightly, but these calculations are going to be more accurate than your best guess believe me. They are based on real data of real bass sizes!
Largemouth Bass Length to Weight Data
| Length (inches) | Weight (lbs) |
|---|---|
| 10 | 0.50 |
| 10.5 | 0.56 |
| 11 | 0.69 |
| 11.5 | 0.75 |
| 12 | 0.88 |
| 12.5 | 1.00 |
| 13 | 1.13 |
| 13.5 | 1.31 |
| 14 | 1.44 |
| 14.5 | 1.63 |
| 15 | 1.81 |
| 15.5 | 2.00 |
| 16 | 2.25 |
| 16.5 | 2.50 |
| 17 | 2.75 |
| 17.5 | 3.00 |
| 18 | 3.31 |
| 18.5 | 3.63 |
| 19 | 3.94 |
| 19.5 | 4.25 |
| 20 | 4.63 |
| 20.5 | 5.06 |
| 21 | 5.44 |
| 21.5 | 5.88 |
| 22 | 6.38 |
| 22.5 | 6.81 |
| 23 | 7.31 |
| 23.5 | 7.88 |
| 24 | 8.44 |
| 24.5 | 9.00 |
| 25 | 9.63 |
Smallmouth Bass Length to Weight Data
| Length (inches) | Weight (lbs) |
|---|---|
| 10 | 0.50 |
| 10.5 | 0.56 |
| 11 | 0.63 |
| 11.5 | 0.69 |
| 12 | 0.81 |
| 12.5 | 0.94 |
| 13 | 1.06 |
| 13.5 | 1.19 |
| 14 | 1.31 |
| 14.5 | 1.44 |
| 15 | 1.63 |
| 15.5 | 1.75 |
| 16 | 1.94 |
| 16.5 | 2.13 |
| 17 | 2.38 |
| 17.5 | 2.56 |
| 18 | 2.81 |
| 18.5 | 3.06 |
| 19 | 3.31 |
| 19.5 | 3.56 |
| 20 | 3.88 |
| 20.5 | 4.19 |
| 21 | 4.50 |
| 21.5 | 4.81 |
| 22 | 5.19 |
| 22.5 | 5.56 |
| 23 | 5.94 |
| 23.5 | 6.31 |
| 24 | 6.75 |
| 24.5 | 7.19 |
| 25 | 7.63 |
Typical Bass Size to Weight Ranges
Some rules of thumb for how heavy a largemouth bass is based on its length are:
- Anything under 12″ weighs less than 1 lb
- At 15.5 you hit 2 lbs on average
- For a 3 lb bass it needs to be 17.5″ long
- Just over 20″ will give you a 5lb bass
- A 24.5 inch bass will weigh in at 9 pounds
How Much Does a 19 Inch Bass Weigh?
According to the bass size charts, a 19 inch largemouth bass weighs 3.94 lbs whereas a 19 inch smallmouth bass weighs 3.31 lbs
How Much Does a 22 Inch Bass Weigh?
A 22 inch largemouth bass is estimated to weigh 6.38 lbs and a 22 inch smallmouth bass weighs in at 5.19 lbs on average.
How Much Does a 23 Inch Bass Weigh?
Using the average length to weight measurements, a 23 inch bass weighs 7.31 lbs if it is a largemouth and 5.94 lbs if it is a smallmouth.
The Last Cast
Data-based decisions are not only useful in the workplace. With all the data that has been collected about fish sizes over the years you can now reliably estimate the weight of your bass by simply measuring its length.
Guessing the weight of your catch “by feel” is one way to do it but it isn’t necessarily the best. Using a bass weight by length chart is going to give you the best approximation of fish size besides carrying a fish scale around with you.
And these charts can be saved on your phone, so they take up no space at all. Give them a try on your next catch and see how they measure up.
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