King Snake Prey Size Chart & Calculator
The right prey size is the single most important feeding decision for a king 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 60 g | Pinky mouse (2–5g) | ~3 g | every 6 days |
| 60–150 g | Fuzzy mouse (5–10g) | ~7 g | every 7 days |
| 150–350 g | Hopper or adult mouse (10–25g) | ~18 g | every 9 days |
| 350 g and up | Adult mouse or small rat (20–45g) | ~30 g | every 12 days |
What to feed
Kingsnakes are carnivores fed appropriately-sized frozen-thawed mice and, for larger adults, small rats. Prey should be roughly the width of the snake's widest point. House kingsnakes alone — they will cannibalise other snakes.
Frequently asked questions
What size prey should a king snake eat?
Prey should weigh roughly 10-15% of the king 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 do kingsnakes eat?
Hatchlings every 5-7 days, juveniles weekly, and adults every 10-14 days. Space meals out further as the snake grows.