Cooking · roasting

Leg of lamb cooking time calculator

Bone-in leg of lamb by weight — with the pull temperature and carryover for a rosy medium that meets the safe minimum.

In short

A 6 lb bone-in leg of lamb at 325°F takes roughly 2–2½ hours. For medium (145°F final, USDA-safe) pull it around 138°F and rest 10–20 minutes. Many cooks prefer medium-rare (135°F), which is below the safe minimum.

Roast details

Roasting plan
Pull from oven at136°F
Final after rest145°F
Carryover rise+8–10°F
Time
Rest

About this estimate

This page locks the leg of lamb cooking time into the roasting calculator. Time is a planning estimate — oven calibration, shape, bone, and starting temperature all change it. The reliable test is a probe thermometer in the thickest part, away from bone: pull at temperature, not at the clock.

Need a different cut or weight? Use the full roasting time calculator.

What temperature for leg of lamb?
145°F for medium meets the USDA minimum with a 3-minute rest. Medium-rare (135°F) is a common preference but sits below the safe minimum.
How long does leg of lamb take?
About 20–25 minutes per pound bone-in at 325°F. Cook to temperature with a probe thermometer rather than to the clock.

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