A 3 lb meatloaf takes about 1 hour 30 minutes at 350°F. Pull it when the centre reads 160°F and rest it 10 to 15 minutes so the slices hold together.
Related conversions
A smaller loaf comes out sooner — a 2 lb loaf needs about an hour. At 375°F the same 3 lb loaf finishes in about 1 hour 10 minutes. The underlying rule is roughly 30 minutes per pound, and smoking follows different logic again.
Related conversions
More under cooking times.
The number
| Loaf weight | 350°F | 375°F | 400°F |
|---|---|---|---|
| 1 lb | 35–40 min | 30–35 min | 25–30 min |
| 2 lb | 1 hr | 50–55 min | 45–50 min |
| 3 lb | 1 hr 30 min | 1 hr 10 min | 1 hr |
| 4 lb | 2 hr | 1 hr 35 min | 1 hr 20 min |
Times assume a free-form loaf about 3 inches deep, uncovered, in a fully preheated oven. Every row ends the same way: pull it when the centre reads 160°F.
Three pounds is where shape starts to matter
At 3 lb most cooks reach for a bigger pan and end up with a deeper loaf, and depth is what actually sets the time.
A 3 lb loaf kept to the same 3 inch depth as a 2 lb one — longer rather than taller — lands closer to 1 hour 15 minutes than 1 hour 30. Pile the same meat into a tall 8×4 pan and you can pass 1 hour 45.
If you are cooking for a crowd and time matters, the reliable move is two 1.5 lb loaves side by side. They finish in about 45 to 50 minutes, brown on more surfaces, and give you twice the crust per serving.
On doneness. The USDA puts the safe internal temperature for ground meat at 160°F. Time is a prediction; the thermometer is the answer. Take the reading in the thickest part of the loaf, away from the pan.
What moves the time
| Change | Effect |
|---|---|
| Baked in a loaf pan rather than free-form | Add 10–15 min — the pan shields the sides |
| Meat straight from the fridge | Add 10 min |
| Loaf flattened to 2 inches deep | Subtract 15–20 min |
| Glaze added in the last 15 minutes | No change; added earlier it scorches |
| Convection setting | Subtract about 10 min, or drop the oven 25°F |
| Very lean mix, 93/7 or leaner | Same time, but pull promptly — it dries fast past 160°F |
How to check it properly
Slide an instant-read probe in from the end of the loaf, horizontally, so the tip sits in the geometric centre. Probing from the top risks pushing through into the pan and reading hot metal instead of meat.
If two readings an inch apart disagree, believe the lower one.
Carryover heat raises the centre by roughly 5°F during the rest, so pulling at 160°F and resting 10 minutes lands you just above it: safe and still juicy.
The rest is not optional — cut straight away and the juice runs onto the board instead of staying in the slice.
Common questions
Two smaller loaves or one big one?
Two, if you are in a hurry: about 45 to 50 minutes instead of 90, and more browned surface. One, if you want clean thick slices for sandwiches the next day.
The top is done but the centre is not.
The loaf is too deep for the oven temperature. Tent it with foil and keep going; next time either flatten it or drop to 325°F and accept a longer, more even cook.
Does resting really need 15 minutes at this size?
Yes. A bigger loaf holds more heat, so carryover runs longer and the juices need longer to settle. Cut a 3 lb loaf at five minutes and you will lose visibly more liquid to the board.
Sources
- USDA Food Safety and Inspection Service — Safe Minimum Internal Temperature Chart (160°F for ground meat)
Times on this page are predictions for a stated loaf shape and oven temperature. Doneness is decided by internal temperature, not by the clock.
