Human heart weights how many grams?

The average human heart weighs between 250 to 350 grams (approximately 8.8 to 12.3 ounces) in adults, with variations based on factors such as age, sex, and overall body size. Generally, male hearts tend to be slightly heavier than female hearts. The heart's weight can also be influenced by conditions such as hypertrophy due to high blood pressure or athletic training.