You’ll generally grill pork tenderloin for about 15–30 minutes total, but the real key is cooking it to an internal temperature of 145°F and letting it rest, not just watching the clock.

Quick Scoop

  • Target internal temp: 145°F in the thickest part, then rest 5–10 minutes before slicing.
  • Typical total grill time: 12–30 minutes , depending on size, grill heat, and whether you use direct or indirect heat.
  • Common range for a 1–1.5 lb tenderloin: about 20–25 minutes over medium‑high direct heat (around 450°F), turning every few minutes.
  • With medium indirect heat, many home cooks report around 25–30 minutes to hit 145°F.

Think of time as your ballpark estimate and the thermometer as the boss that makes the final call.

How Long to Grill Pork Tenderloin

For a typical 1–1.5 pound pork tenderloin, here’s what most tested recipes and guides converge on.

Over medium‑high direct heat (about 450°F)

  • Preheat grill to about 450–500°F.
  • Grill, lid closed, turning every 4–5 minutes so all sides sear evenly.
  • Expect around 20–25 minutes total to reach 145°F in the center.
  • Smaller tenderloins (around 1.25 lb) can finish a few minutes faster; larger ones (around 1.75–2 lb) may need 5–10 minutes more.

With a two‑zone setup (sear then indirect)

A lot of forum and recipe advice favors a hybrid approach: quick sear, then finish gently over indirect heat so the ends don’t dry out.

  • Sear over direct heat for 3–6 minutes per side to build color.
  • Move to indirect heat and cook another 15–25 minutes , depending on size and grill temp, until you hit 145°F.
  • Total time usually lands in the 25–30 minute window for an average tenderloin.

Time by Weight (rough guide at moderate–high heat)

Here’s a rough timing grid other cooks and guides use when grilling and rotating the meat, with a good sear plus an indirect finish.

[5][7] [3][7] [7]
Pork tenderloin size Approx. total grill time Notes
~1 lb 18–25 minutes Heats quickly; watch closely near the end.
~1.5 lb 20–27 minutes Common size; many recipes cite ~25 minutes at 450°F.
~2 lb 25–30 minutes May need a bit more indirect time to reach 145°F.
These ranges assume a preheated grill and regular turning, so cold grills or very low heat will lengthen the cook.

Simple Step‑By‑Step Game Plan

Imagine it’s a weeknight and you want juicy pork, minimal fuss:

  1. Prep the meat
    • Trim silver skin; pat dry.
    • Season with salt, pepper, and your favorite rub or marinade.
  1. Preheat the grill
    • Aim for medium‑high (around 450°F) with a direct and indirect zone if possible.
  1. Sear all sides
    • Place tenderloin over direct heat.
    • Grill about 4–6 minutes per side , rotating until you’ve hit all 3–4 sides and have good color.
  1. Finish gently
    • Move to indirect heat, close the lid, and continue cooking, checking the thickest part after the 15–20 minute mark total.
 * Pull at **140–145°F** , knowing it will rise a couple of degrees while resting.
  1. Rest and slice
    • Tent loosely with foil and rest 5–10 minutes.
 * Slice against the grain into medallions.

If you’re worried about burning the ends before the center is done, shifting to indirect heat sooner and keeping a close eye on the thermometer is the trick many forum users rely on.

Mini Forum‑Style View: What People Debate

Home cooks and grill nerds tend to split into a couple of friendly camps about how long and how hot to go.

“Cook to temp, not time” is the most repeated advice in pork tenderloin threads.

  • High‑heat direct fans
    • Like a shorter overall cook (around 20–25 minutes) at 450–500°F with frequent turning.
* They swear this keeps the inside juicy and gives the outside a great crust.
  • Two‑zone, low‑stress crowd
    • Prefer a quick sear plus indirect finish for about 25–30 minutes , especially on gas grills.
* They emphasize that this method helps avoid burnt ends and uneven cooking.
  • Thermometer‑first people
    • Insist that if you have an instant‑read or leave‑in probe, you can stop worrying about exact minutes and just guard that 145°F target.

Safety, Doneness, and “Latest” Pork Advice

Modern guidance treats 145°F with a rest as safe for pork tenderloin, which is why so many newer recipes aim for a slight blush of pink in the middle instead of cooking it to well‑done.

  • Below 145°F : Generally not recommended for food safety in pork.
  • 145–150°F : Juicy, with a faint pink center; this is the current sweet spot for many cooks.
  • 150–160°F : Firmer, closer to traditional “no pink” pork.
  • 160°F+ : Very well done; most grill guides warn it tends to dry out.

You’ll see older posts still suggesting higher temps, but the more recent recipes and forum discussions lean toward that 145°F standard for tenderness and flavor.

TL;DR: For a 1–1.5 lb pork tenderloin, plan on roughly 20–25 minutes at medium‑high heat (or 25–30 minutes with a sear‑then‑indirect method), but always pull it when the center hits 145°F , rest, then slice.

Information gathered from public forums or data available on the internet and portrayed here.