How much does a fish weigh in grams and kg?

The weight of a fish can vary widely depending on the species. For example, a small goldfish may weigh around 100 grams (0.1 kg), while a large tuna can weigh over 200 kg (200,000 grams). On average, Freshwater Fish like bass or trout typically weigh between 1 to 5 kg (1,000 to 5,000 grams). Thus, the weight of a fish can range dramatically based on its type and size.