Bake pork tenderloin at 400°F for about 20 to 25 minutes, depending on thickness, until the center reaches 145°F. Let it rest for 3 minutes before slicing. Use an instant-read thermometer for the most reliable result.
How Long To Bake Pork Tenderloin At 400: bake a 1 to 1 1/2 lb pork tenderloin for 20 to 25 minutes, until the center reaches 145°F (63°C).
Remove it from the oven, rest it for 3 minutes, then slice. For the most even result, place the tenderloin on a rimmed baking sheet or in a shallow pan, and check the thickest part with an instant-read thermometer.
The Short Answer, With Numbers
Bake pork tenderloin at 400°F for about 20 to 25 minutes for a typical 1 to 1 1/4 lb tenderloin. Pull it when the thickest center reads 145°F, then rest it 3 minutes before slicing.
Use temperature, not the clock, as the final answer. Pork tenderloin is narrow, so a few minutes can move it from juicy to dry. Start checking early, especially if it is under 1 lb.
| Food | Safe minimum internal temperature | Rest time |
|---|---|---|
| Beef, pork, veal and lamb – steaks, chops, roasts | 145°F (63°C) | 3 minutes |
400°F Timing By Tenderloin Size
For a 3/4 lb pork tenderloin, start checking at 16 minutes. It may finish around 18 to 21 minutes, depending on thickness and whether it went into the oven cold.
For a 1 lb pork tenderloin, plan on 20 to 23 minutes at 400°F. Check the center at 18 minutes if the tenderloin is slim or if your pan was preheated.
For a 1 1/4 lb pork tenderloin, plan on 22 to 26 minutes. If it is thick in the middle and tapered at both ends, the center may need the full range.
For two tenderloins on one pan, the time is usually similar if they are not touching. Leave at least 1 inch between them so hot air can reach the sides.
Worked Example
Example: you have a 1.1 lb pork tenderloin. Bake at 400°F for 20 minutes, then insert a thermometer into the thickest part from the side.
If it reads 138°F, return it to the oven and check again in 3 to 4 minutes. If it reads 145°F, remove it and rest it 3 minutes before cutting.
If it reads 150°F, it is already past the minimum. Rest it 3 minutes, slice promptly, and spoon any pan juices over the meat to reduce dryness.
Edges, Ends, And Pan Details
The tapered ends cook faster than the center. Judge doneness only at the thickest middle section, not at the skinny tip.
If you sear first, reduce the oven time. A tenderloin seared 2 minutes per side may need only 12 to 18 minutes at 400°F to reach 145°F.
If you wrap the tenderloin in bacon, add time and still check the pork center. The bacon surface color does not tell you the pork’s internal temperature.
If the tenderloin is stuffed, treat it differently: the safe row for stuffed chicken and turkey is not relevant to pork tenderloin here, so use only a thermometer and a trusted stuffed-pork recipe.
Best practical target: remove plain pork tenderloin from a 400°F oven at 145°F in the center, rest 3 minutes, then slice across the grain into 1/2-inch medallions.
Baking Time At 400
Bake pork tenderloin at 400°F for about 20 to 25 minutes for a typical 1 to 1.25 lb tenderloin. Pull it when the thickest part reaches 145°F, then rest 3 minutes.
Pork tenderloin is narrow, so weight matters less than thickness. A 1 lb tenderloin that is 2 inches thick may finish faster than a 1.25 lb tenderloin that is 2.75 inches thick.
| Pork tenderloin size | Approximate time at 400°F | Target doneness |
|---|---|---|
| 0.75 lb | 16 to 20 minutes | 145°F, rest 3 minutes |
| 1 lb | 20 to 23 minutes | 145°F, rest 3 minutes |
| 1.25 lb | 22 to 26 minutes | 145°F, rest 3 minutes |
| 1.5 lb | 25 to 30 minutes | 145°F, rest 3 minutes |
| Two 1 lb tenderloins | 20 to 25 minutes | 145°F, rest 3 minutes |
Fast Rule By Thickness
At 400°F, use these practical checks: 1.75 inches thick usually takes 18 to 21 minutes, 2 inches takes 20 to 23 minutes, and 2.5 inches takes 24 to 28 minutes.
Start checking early. Insert the thermometer into the center of the thickest section, not the tapered end. The skinny tip can read done while the middle still needs several minutes.
Example: a 1.1 lb tenderloin, seared first, then baked at 400°F, often reaches 145°F in 18 to 22 minutes. Without searing, expect closer to 22 to 25 minutes.
Example: two 1 lb tenderloins on the same sheet pan do not need double time. If they are spaced apart, the bake time stays near 20 to 25 minutes.
Example: a 1.5 lb extra-thick tenderloin may need 28 to 30 minutes. If it is already at 135°F at 22 minutes, check every 3 minutes to avoid overshooting.
Covered, Foil-Wrapped, Or Stuffed
Do not use the same timing for a foil-wrapped tenderloin. Foil slows browning and can change heat flow. Expect roughly 25 to 35 minutes, but verify the center with a thermometer.
If the tenderloin is coated with a thick glaze, sugar can darken fast at 400°F. Bake 15 minutes first, brush on the glaze, then continue until the center reaches 145°F.
For bacon-wrapped pork tenderloin, plan on 25 to 30 minutes at 400°F. The pork must reach 145°F and rest 3 minutes; the bacon’s appearance alone is not a doneness test.
If the tenderloin is stuffed, do not rely on the plain-tenderloin timing. Use a thermometer in the center of the stuffed area and cook until the pork reaches its required safe temperature.
When To Pull It From The Oven
Pull pork tenderloin when the thickest part reads 145°F. Let it rest 3 minutes before slicing. That rest keeps juices from flooding the cutting board.
If it reads 140°F, return it to the oven for 3 to 5 minutes. If it reads 150°F, remove it immediately and rest it; slicing right away will make it seem drier.
For even slices, cut the tenderloin crosswise into 1/2-inch medallions. The center may be faintly pink at 145°F after the 3-minute rest, which is expected for this cut.
Time By Tenderloin Weight
At 400°F, pork tenderloin usually takes 18 to 30 minutes, depending mostly on weight and thickness. The endpoint is 145°F in the thickest part, followed by a 3-minute rest.
| Tenderloin weight | Approx. bake time at 400°F | Best use of this estimate |
|---|---|---|
| 12 oz | 16 to 20 minutes | Small, narrow tenderloin |
| 1 lb | 18 to 22 minutes | Most common single tenderloin |
| 1 1/4 lb | 22 to 26 minutes | Average thick tenderloin |
| 1 1/2 lb | 25 to 30 minutes | Large or uneven tenderloin |
| 2 lb total, 2 pieces | 22 to 28 minutes | Two 1-lb tenderloins on one pan |
Worked Examples
For a 1-lb pork tenderloin, start checking at 18 minutes. If the center is not yet 145°F, return it to the oven and check again every 2 to 3 minutes.
For a 1 1/4-lb tenderloin, plan on about 24 minutes. A thin 1 1/4-lb piece may finish near 22 minutes, while a round, thick one may need 26 minutes.
For two 1-lb tenderloins, do not double the time. If they sit with space between them, expect roughly 22 to 28 minutes, not 36 to 44 minutes.
For a 1 1/2-lb tenderloin, start checking at 25 minutes. Large tenderloins often cook unevenly, so probe the thickest section, not the tapered end.
Thickness Matters More Than Ounces
A long, skinny 1-lb tenderloin may finish in 18 minutes. A short, thick 1-lb tenderloin may need 22 minutes or slightly more because heat takes longer to reach the center.
If the tapered end is much thinner, tuck it under before baking. This makes the piece more even and helps prevent the tip from drying while the thick center reaches 145°F.
If the tenderloin is tied, stuffed, or tightly wrapped, use the longer end of the range and verify doneness with a thermometer. Stuffed pork tenderloin is not as predictable by time alone.
Pan And Oven Edge Cases
A preheated sheet pan or cast-iron skillet can shorten the bake by 2 to 4 minutes because the bottom starts cooking immediately.
A cold glass or ceramic dish can add 2 to 5 minutes, especially with a 1 1/4-lb or 1 1/2-lb tenderloin.
If the tenderloin goes in straight from a very cold refrigerator, expect the high end of the range. For a 1-lb piece, that means closer to 22 minutes than 18 minutes.
After baking, rest pork tenderloin for 3 minutes. Slice across the grain into 1/2-inch medallions so the center stays juicy and the pieces look even on the plate.
How To Bake It
Bake pork tenderloin at 400°F until the thickest part reaches 145°F, then rest it 3 minutes. For most 1 to 1 1/2 lb tenderloins, that usually takes 20 to 25 minutes after searing.
400°F Pork Tenderloin Method
- Step 1: Heat the oven. Set the oven to 400°F. Place a rack in the center position. If using a sheet pan, line it with foil. If using a skillet, choose one that can go from stovetop to oven.
- Step 2: Trim and dry the meat. Remove silver skin with a thin knife. Pat the tenderloin very dry. A typical pork tenderloin is 12 to 15 inches long and weighs about 1 to 1 1/2 lb.
- Step 3: Season it evenly. Use about 1 teaspoon kosher salt per 1 lb pork, plus black pepper. Add 1 tablespoon oil. Optional: add 1 teaspoon garlic powder, 1 teaspoon paprika, or 1 tablespoon chopped rosemary.
- Step 4: Sear for color. Heat 1 tablespoon oil in a skillet over medium-high heat. Sear the tenderloin 2 minutes per side, about 6 minutes total. This step improves browning and shortens oven time.
- Step 5: Bake at 400°F. Transfer to the oven. Bake a 1 lb tenderloin for about 18 to 22 minutes after searing. Bake a 1 1/2 lb tenderloin for about 22 to 27 minutes after searing.
- Step 6: Check the thickest part. Insert an instant-read thermometer sideways into the center. Pull the pork when it reaches 145°F. Do not judge by color; pork can still be slightly pink at the safe temperature.
- Step 7: Rest, then slice. Rest the tenderloin 3 minutes before cutting. Slice across the grain into 1/2-inch medallions. Spoon pan juices over the slices to keep the lean meat moist.
Timing Examples At 400°F
| Tenderloin Size | If Seared First | If Not Seared | Target |
|---|---|---|---|
| 1 lb | 18 to 22 minutes | 22 to 26 minutes | 145°F, rest 3 minutes |
| 1 1/4 lb | 20 to 24 minutes | 24 to 28 minutes | 145°F, rest 3 minutes |
| 1 1/2 lb | 22 to 27 minutes | 27 to 32 minutes | 145°F, rest 3 minutes |
Worked example: a 1.25 lb tenderloin seared for 6 minutes usually needs about 22 minutes in a 400°F oven. Start checking at 20 minutes, because thickness matters more than weight.
If the tenderloin is unusually thin, start checking at 16 minutes after searing. If it is thick in the center, expect the high end of the range, about 26 to 27 minutes for a 1 1/2 lb piece.
For two tenderloins on one pan, use the same temperature. Leave at least 1 inch between them. Timing usually stays close to the single-tenderloin range if air can circulate.
If stuffing is involved, the dish is no longer treated like plain pork tenderloin. Stuffed pork must reach 165°F. Check the center of the stuffing, not just the meat.
When Pork Is Done
Pork tenderloin is done when the thickest part reaches 145°F on a food thermometer, followed by a 3-minute rest. At 400°F, time is only an estimate; temperature is the doneness test.
Start checking early. A small 1-pound tenderloin may reach 145°F in about 18 to 22 minutes at 400°F, while a thicker 1½-pound tenderloin may take closer to 22 to 28 minutes.
Insert the thermometer from the side into the center of the thickest section. Avoid pushing through to the pan, because the metal pan can give a falsely high reading.
Target Temperature And Rest
| Cut | Done At | Rest |
|---|---|---|
| Pork tenderloin | 145°F | 3 minutes |
| Fresh pork roast or chops | 145°F | 3 minutes |
The 3-minute rest matters. If the center reads 145°F, remove the pork from the oven, leave it on a cutting board or platter, and wait 3 full minutes before slicing.
Do not judge doneness by color alone. A properly cooked pork tenderloin can still be slightly pink in the center after reaching 145°F and resting 3 minutes.
Worked Timing Examples At 400°F
Example 1: a 1-pound tenderloin goes into a fully preheated 400°F oven. Check at 18 minutes. If it reads 138°F, return it to the oven and check again in 3 to 4 minutes.
Example 2: a 1¼-pound tenderloin reads 145°F at 23 minutes. Take it out immediately and rest it 3 minutes. Do not keep baking just to reach a round number of minutes.
Example 3: two tenderloins on one pan may not finish together. If one reads 145°F and the other reads 140°F, remove the first and keep baking the second.
Edge Cases That Change The Baking Time
A tenderloin tucked under at the thin end cooks more evenly. If the thin tail is left flat, that end may finish early and become dry while the thick middle is still below 145°F.
A cold tenderloin taken straight from the refrigerator can take longer than one that sat briefly while the oven preheated. Use the thermometer, not the clock, to decide.
A stuffed pork tenderloin is different. Because stuffing changes the food-safety category, it should reach 165°F with no listed rest time.
A sauce or glaze can darken quickly at 400°F, especially if it contains sugar. Browning on the outside does not prove the center has reached 145°F.
If you cut into the tenderloin and the center looks underdone, stop slicing. Put the remaining piece back in the oven and cook until the thickest part reaches 145°F.
For clean slices, rest first, then cut across the grain into medallions. Slicing before the 3-minute rest lets juices run out and makes the pork seem drier.
Resting Before Slicing
For pork tenderloin baked at 400°F, rest it before slicing. The safe target is 145°F with a 3-minute rest. That 3 minutes is part of the doneness standard for pork steaks, chops, and roasts.
Use a thermometer first, then the clock. If the thickest center reads 145°F, move the tenderloin to a cutting board and rest it at least 3 minutes before cutting.
Exact Resting Timeline
| Time | What to do | Why it matters |
|---|---|---|
| 0:00 | Remove pork at 145°F | Meets the listed safe minimum for pork roasts |
| 0:00-0:30 | Transfer to board | Stops pan heat from pushing the bottom too far |
| 0:30-3:00 | Rest, unsliced | Completes the required 3-minute rest |
| 3:00+ | Slice across the grain | Keeps slices juicier and cleaner |
Do not slice at the oven door. A 1-pound tenderloin can lose a visible puddle of juices if cut immediately. Resting keeps more moisture inside each slice instead of on the board.
A practical serving rest is 5 minutes for one tenderloin and 8 to 10 minutes for two tenderloins on the same board. The safety rest is 3 minutes; the extra time is for cleaner slicing and better texture.
Worked Examples
Example 1: a 1.1-pound tenderloin reads 145°F in the thickest part. Pull it from the oven, rest 3 minutes minimum, then slice into 1/2-inch medallions.
Example 2: two tenderloins finish unevenly. One reads 145°F and the other is lower. Remove only the 145°F piece if possible. Keep cooking the second until its own center reaches 145°F.
Example 3: the tip reads 150°F but the center reads 142°F. Do not use the tip as your guide. Continue baking and recheck the thickest center, because that is the last part to finish.
Example 4: the center reaches 145°F, but dinner is not ready. Rest the tenderloin whole rather than slicing early. Slice only when you are ready to plate.
Foil Or No Foil?
For a normal 3 to 5 minute rest, leave the tenderloin uncovered. This protects any browned surface from steaming soft.
If resting closer to 10 minutes, tent loosely with foil. Do not wrap it tight. A tight wrap traps steam and can soften the crust you created at 400°F.
How To Slice After Resting
Cut across the grain into 1/2-inch slices for dinner portions. For sandwiches, slice thinner, about 1/4 inch. Use a sharp knife so you do not press juices out of the meat.
If the tenderloin has a narrow tail, slice that end slightly thicker. The tail cooks faster and can feel drier, so thicker pieces help it eat closer to the center cuts.
If you added a glaze, wait until after the 3-minute rest to make the final slices. Sticky glazes tear more easily when the pork is very hot and freshly pulled from the oven.
Frequently Asked Questions
How long do you bake pork tenderloin at 400°F?
Bake pork tenderloin at 400°F for about 20 to 25 minutes for a 1-pound tenderloin. Start checking early with an instant-read thermometer. It is done when the thickest part reaches 145°F, then rest it for 3 minutes before slicing.
How long does a 2-pound pork tenderloin take at 400°F?
A 2-pound pork tenderloin usually takes about 30 to 35 minutes at 400°F, depending on thickness and oven accuracy. Use the time as a guide only. The safe target is 145°F in the center, followed by a 3-minute rest.
Should pork tenderloin be covered when baking at 400°F?
Bake pork tenderloin uncovered at 400°F if you want a browned outside. Covering traps steam and softens the crust. For juicier results, sear first for 2 to 3 minutes per side, then bake until it reaches 145°F.
How do I keep pork tenderloin from drying out at 400°F?
Do not overbake it. At 400°F, pork tenderloin can go from juicy to dry quickly after about 25 minutes for a 1-pound piece. Pull it when the thickest part reaches 145°F, then rest it for 3 minutes before cutting.
Can I bake pork tenderloin at 400°F from frozen?
Yes, but it takes longer and cooks less evenly. Plan on roughly 50% more time than thawed pork tenderloin, then verify doneness with a thermometer. The center must reach 145°F, and the pork should rest for 3 minutes before slicing.
