How Long Do I Grill A Pork Tenderloin? | Juicy Every Time

Most 1–1½ lb tenderloins take 18–25 minutes on a 400°F grill, pulled at 145°F, then rested 3 minutes.

Pork tenderloin is lean, so it can dry out if you chase “just a few more minutes.” A clock helps, but the thermometer makes the call. Once you grill to the right internal temperature, the timing gets easy.

Below you’ll get repeatable time ranges, a two-zone method for gas or charcoal, and quick fixes for the usual mistakes. No guesswork. Just tender slices.

How Long Do I Grill A Pork Tenderloin? Time Ranges You Can Trust

A standard tenderloin (about 1 to 1½ pounds, 1½ to 2 inches thick at the widest point) usually finishes in 18–25 minutes when your grill is running around 375–425°F with a two-zone setup. Thin tenderloins can land closer to 15–20 minutes. Thick ones can push into the high 20s.

Thickness drives grill time more than weight. If you buy a package with two tenderloins, they often cook at different speeds. Treat them as separate pieces and probe both.

Time ranges by thickness (A quick mental model)

If you’re standing at the grill with no scale and no ruler, thickness still gives you a solid forecast.

• About 1¼ inches at the thickest point: often 15–20 minutes total.
• About 1½ inches: often 18–25 minutes total.
• Near 2 inches: often 22–30 minutes total.

Those ranges assume you sear first, then finish with the lid closed on indirect heat. If you try to cook the whole tenderloin over direct heat, you can hit 145°F fast, but the outside tends to get ahead of the center.

What “done” should feel like when you slice it

A properly cooked tenderloin is moist, with a gentle spring when you bite. The slices stay glossy, not chalky. If the center looks pale and the fibers look tight, it likely went past the target.

Cook to 145°F, then rest

Whole pork cuts are safe at 145°F with a short rest. U.S. food-safety guidance lists that target for fresh pork, paired with a short rest.

A tenderloin pulled at 145°F can look slightly pink in the center. That’s normal. Color varies by meat and lighting, so treat temperature as your signal.

Why resting changes the number you pull at

After you remove the meat from heat, the center keeps climbing a few degrees. On tenderloin, that carryover rise is often 3–7°F. Pulling at 145°F and resting lands you in the right eating range without pushing the meat dry.

Grilling Time For Pork Tenderloin With Two-Zone Heat

This method gives you crust and control. You sear over direct heat, then finish over indirect heat with the lid closed so the center cooks evenly.

Prep: trim and shape for even cooking

Trim off the silver skin, the shiny strip that stays chewy. If one end is much thinner, tuck it under and tie it with kitchen twine. That small fold keeps the tip from racing ahead of the center.

Seasoning that works on the grill

Salt early if you can—30 to 60 minutes in the fridge helps seasoning move in. If you’re cooking right away, salt just before grilling and use a dry rub that won’t burn.

A simple mix that fits most sides: salt, black pepper, garlic powder, and a light pinch of brown sugar for color. Keep sugar modest so the sear stays clean.

Cook: sear, shift, then probe

1. Preheat the grill with the lid closed until it’s steady around 375–425°F.
2. Sear over direct heat 2–3 minutes per side, turning to brown all around (about 8–10 minutes total).
3. Move to indirect heat, close the lid, and cook 10–18 minutes.
4. Start probing at the 10-minute mark on indirect heat, then recheck each 3–4 minutes near the end.
5. Pull at 145°F in the thickest part. Rest 3 minutes, then slice across the grain.

Thermometer placement that avoids false readings

Insert the probe from the side into the thickest part, aiming for the center. Skip the tip; it cooks faster. If you hit a seam or fat pocket, back out and try again.

Dial in the sear without burning the outside

The sear is there for color and flavor, not to cook the center. Keep it short and even. If flames lick up, slide the tenderloin a few inches away from the hot spot and keep turning until the flare dies down. You’re not losing anything by moving; you’re saving the crust from turning bitter.

On gas, trim stray fat and keep the lid open during the sear so you can react fast. On charcoal, keep a “no-coal” patch ready so you can bail out of a flare-up without panic.

Resting and slicing tricks that keep juices on the plate

Rest the tenderloin on a warm plate, then slice with a sharp knife in smooth strokes. Sawing back and forth squeezes juice out. If you’re feeding a group, slice only half, then keep the other half whole and loosely tented. Whole meat holds heat and moisture better than a pile of slices.

What Changes Grill Time (And what stays steady)

If you control the heat zones and cook to temperature, the rest is just small adjustments. These are the factors that move the clock.

Grill heat and lid discipline

Hotter grills brown faster but shrink your timing window. Cooler grills take longer but feel more forgiving. Either way, keep the lid closed during the indirect finish. Each extra peek dumps heat and stretches the cook.

Surface moisture and sugar

Wet meat browns slowly. Pat the tenderloin dry before it hits the grate. If you use a sweet glaze, brush it on only at the end so it doesn’t scorch.

Weather and crowding

Wind and cold pull heat from the grill. Plan for longer lid-closed time. If you cook two tenderloins, leave space between them on the indirect side so hot air can circulate.

Factor	What To Do	How It Shifts Time
Thickness at widest point	Tie the thin tail under; probe the thick middle	Thicker centers add indirect minutes
Direct heat strength	Sear fast; move off flames if flare-ups start	Hotter sear speeds browning but can raise carryover
Indirect zone temp	Hold 375–425°F with lid down	Lower temps lengthen the finish
Surface moisture	Pat dry; shake off excess marinade	Slower crust leads to longer sear time
Probe placement	Insert from the side into the thickest part	Bad placement can misread and delay the pull
Number of pieces	Give each tenderloin space on indirect heat	Crowding can add a few minutes
Lid opening	Check at 10 min, then each 3–4 min	Extra checks drop heat and extend cook time
Rest time	Rest 3 min before slicing	Carryover finishes the center after the pull

Gas Grill Timing Plan

If you want to double-check the safety target, start with the FSIS safe temperature chart and USDA’s note on recommended meat temperatures. Both point to 145°F for whole pork cuts, followed by a short rest.

On gas, build one hot zone and one gentle zone. Sear on the hot side, then slide the tenderloin over to finish with the lid closed.

• Preheat 10–15 minutes.
• Set one burner high and one burner low or off.
• Cook using the sear-then-indirect steps above, probing near the end.

Charcoal Grill Timing Plan

Charcoal gives strong radiant heat, so the sear can be quick. Bank coals to one side, then cook on the empty side with the lid on.

Sear about 2 minutes per side over the coals, then finish 12–20 minutes on the cool side, probing early. Charcoal can run in waves, so your tenderloin may hit 145°F sooner than the clock suggests.

Grill Setup	Grill Temp	Typical Total Time
Gas, two-zone (high + low/off)	375–425°F	18–25 min
Charcoal, coals banked to one side	375–450°F	16–28 min
Pellet grill (steady heat)	375°F	22–30 min
Reverse-sear style (low then quick sear)	275°F then hot sear	30–45 min total
Thick tenderloin, tied for even shape	375–400°F	22–32 min
Thin tenderloin, no tie	400°F	15–22 min
Direct-only grilling (not advised)	400–450°F	14–22 min, dry edges likely

Finish Strong: Rest, Slice, Serve

Resting is part of the cooking process, not an afterthought. The National Pork Board cooking temperature page also calls out the 3-minute rest after hitting 145°F. After the rest, slice across the grain into ½-inch medallions and serve right away.

If you want a recipe reference for rub ratios and grill workflow, Weber’s tenderloin recipe is a useful cross-check: Dry-Rubbed Pork Tenderloin.

Common Problems And Quick Fixes

The crust is dark but the center is low

Move the meat to indirect heat right away and close the lid. If the grill is running hot, lower the burners or spread the coals. The goal is gentle heat that finishes the center without roasting the surface.

The meat tastes dry

Dry tenderloin usually means it went past the target. Next time, pull at 145°F, rest 3 minutes, and slice. Salt earlier and tie the thin tail; both steps help the meat stay juicy.

Sticking on the first flip

Preheat longer, then oil the grates lightly. During the sear, wait until the meat releases. If you pry it up early, it tears and loses juices.