Corn Snake Prey Size Chart & Calculator
The right prey size is the single most important feeding decision for a corn snake. Prey should be roughly 10-15% of the snake's body weight, or about the width of the snake's widest point. The chart below matches each weight class to a standard frozen prey item.
| Snake weight | Prey item | Prey weight | Frequency |
|---|---|---|---|
| under 30 g | Pinky mouse (2–5g) | ~3 g | every 6 days |
| 30–80 g | Fuzzy mouse (5–10g) | ~7 g | every 7 days |
| 80–200 g | Hopper mouse (10–20g) | ~15 g | every 7 days |
| 200–400 g | Adult mouse (20–30g) | ~25 g | every 9 days |
| 400 g and up | Jumbo mouse or rat pup (30–50g) | ~40 g | every 12 days |
What to feed
Corn snakes are carnivores that eat appropriately-sized mice (and small rats for large adults). Prey should be roughly the width of the snake's widest point, generally 10-15% of body weight. Frozen-thawed prey is the safe standard.
Frequently asked questions
What size prey should a corn snake eat?
Prey should weigh roughly 10-15% of the corn snake's body weight, or be about as wide as the thickest part of the snake. Use the chart and calculator above to match your snake's exact weight.
What happens if the prey is too big?
Oversized prey can cause regurgitation, stress or refusal. When in doubt, size down — a slightly small meal is far safer than one that's too large.
How often should I feed a corn snake?
Hatchlings every 5-7 days, juveniles about every 7 days, and adults every 10-14 days. Stretch the interval as the snake matures to avoid obesity.