Koi Weight | Goldfish Weight | Pond Fish Weight

Professor Russell the Koi Koi weight, goldfish weight, and pond fish weight

Fish Length, Weight, and the Ammonia they Produce

Fish Length

Weight in Grams
Ammonia Produced in MG/24 hrs
1"
0.28
0.05
2"
2.27
0.45
3"
7.37
1.47
4"
17.58
3.52
5"
34.30
6.86
6"
59.25
11.85
7"
94.40
18.88
8"
140.61
28.12
9"
200.43
40.08

10"

274.99

54.99

12"

475.14

95.02

14"

754.38

150.88

16"

1,126.04

225.21

18"

1,603.17

320.63

20"

2,199.36

439.87

22"

2,927.10

585.42

24"

3,800.25

760.05

26"

4,831.61

966.32

28"

6,034.76

1,206.95
30"
7,422.47
1,484.49

Koi Weight | Goldfish Weight | Pond Fish Weight

Miss Russell Koi says: Koi Weight is an important thing to know

It is to the benefit of both you and your fish to know your total koi weight, goldfish weight, and pond fish weight. Know the total weight of all the fish in your pond will help you when calculating doses of medications, or when determining how much to feed. The total koi weight will also tell you if your filtration system can support all your fish. The most accurate way to determine you koi weight is to actually weigh it. Usually that is not practical or easy to do.

Use our koi weight chart to estimate the weight of all the fish in your pond as determined by their lengths. The total fish length is from the tip of the nose to the tip of the tail. Please keep in mind that the above fish weight chart is for “average” fish body sizes. A skinny koi, goldfish, or pond fish of a given length may weigh 25% to 50% less than a typical fish. An “out-of-shape couch potato” shaped (fat) fish of a given length could weigh 25% to 50% more than a typical fish. You can judge where your fish falls on the skinny-normal-fat scale.

Along with knowing how much koi weight and total pond fish weight you have in your pond, you can use the chart above to estimate their potential growth. Having some idea of future weight will help you make decisions such as “When do I need to upgrade my biological filter?” and “How much SSA does my biological filter need to be?”


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