Yellow perch are a favorite panfish across the Great Lakes and Midwest, and knowing what your catch weighs is half the fun of a good perch bite. This yellow perch length-to-weight chart gives quick weight estimates by length for fish in average condition.
Yellow perch length-to-weight chart
These figures use weight (lb) = length³ ÷ 2,000 (length in inches), which matches widely published yellow perch data — roughly half a pound at 10 inches and over a pound at 13 inches.
| Length | Average weight |
|---|---|
| 6″ | 0.11 lb |
| 7″ | 0.17 lb |
| 8″ | 0.26 lb |
| 9″ | 0.36 lb |
| 10″ | 0.50 lb |
| 11″ | 0.67 lb |
| 12″ | 0.86 lb |
| 13″ | 1.10 lb |
| 14″ | 1.37 lb |
What counts as a “jumbo” perch?
Most perch caught are 6–10 inches and under a pound. The threshold for a “jumbo” varies by region, but most anglers use 10–12 inches as the marker — big enough for a worthwhile fillet — and a fish at the top of the table (13–14 inches, over a pound) is a genuine trophy that’s often 8+ years old. The all-tackle record is a 4 lb 3 oz perch caught in New Jersey in 1865 — the oldest-standing freshwater fish record in North America.
Put a number on your exact fish (worked example)
Weight (lb) = Length × Girth² ÷ 800
A 12-inch jumbo perch with an 8-inch girth comes out to 12 × 8 × 8 ÷ 800 = 0.96 lb, above the 0.86 lb chart average — a fat, deep-bodied fish. Measure both and use the free fish weight calculator; details in how to estimate a fish’s weight.
Why two perch of the same length weigh differently
Perch in highly productive lakes — abundant forage, uncrowded population — grow deep-bodied and can beat the chart by 10–15%. In heavily fished lakes where perch compete for limited food, they run lean. Pre-spawn and post-spawn fish bulk up; spawning fish slim down.
Where and when to find bigger yellow perch
Yellow perch hold in clear, cooler lakes, reservoirs, and slow rivers near vegetation with little current, and tolerate deeper water and lower oxygen than many panfish. They travel in schools, so where you catch one, more follow — stay put and keep working the spot. Lake Erie is the signature jumbo-perch fishery; pre-spawn spring produces the heaviest fish.
Yellow perch weight FAQ
How much does a 12-inch yellow perch weigh? About 0.85–1 pound — jumbo territory.
What’s a jumbo/trophy perch? 10–12 inches for a jumbo; 13-inch-plus is a true trophy.
Why do I catch perch in bunches? They’re schooling fish — find one and there are usually more nearby.