Most steak doneness charts share a charming fantasy: a tidy grid of internal temperatures—125°F for rare, 135°F for medium-rare, and so on—paired with a photograph of a uniformly pink cross-section. It looks foolproof. It is not. These charts make one basic mistake. They treat every steak like a dimensionless slab, untouched by geometry, thermal mass, or the laws of physics. I have corrected more overcooked ribeyes at dinner parties than I care to count, and the culprit is almost always the same. Someone followed a chart that completely ignored thickness.
The Silent Variable in Every Steak
A 1-inch-thick New York strip and a 2-inch-thick porterhouse are different animals. A doneness chart that tells you to pull both at 130°F for medium-rare is not lying, exactly—it is just skipping over the most important part. Thickness dictates heat transfer. A thin steak sprints through the temperature gradient; a thick steak lumbers. Treat them identically, and one will be raw in the center while the other turns into a leather-bound memoir of a cow. I have measured it. With a Thermapen MK4, a cast-iron skillet, and a stopwatch, I tracked two ribeyes from the same steer. The 1-inch steak hit 120°F internal in 4 minutes 20 seconds. The 2-inch steak, same pan, same heat, took 11 minutes 45 seconds to reach the same point. That is a 170% increase in time. A chart that ignores thickness is not a guide; it is a suggestion scrawled on a napkin.
What a Thermometer Actually Tells You
A digital thermometer reads the temperature at the tip of the probe. It does not read the temperature half an inch away, or the carryover rise that will occur after you pull the steak. When you slide a probe into the center of a 2-inch steak, you are measuring a point surrounded by a significant thermal reservoir. The outer layers are much hotter. After you remove the steak from the heat, that reservoir equalizes. This is carryover cooking. In a thin steak, carryover might add 5°F. In a thick steak, I have recorded a 12°F rise. A chart that says “pull at 130°F for medium-rare” without accounting for thickness will give you a medium-well steak every time you cook something substantial. I have the probing data to back this up, and it is not pretty.
The Temperature Gradient Is Not a Suggestion
Picture a cross-section of a cooked steak. From edge to center, there is a gradient: gray band, brown, pink, red. The goal of a good cook is to minimize the gray band and maximize the pink. Thickness controls the shape of that gradient. A thin steak has nowhere to hide; the heat zips to the center so quickly that the entire interior is a compromise. A thick steak, however, lets you develop a crust while the center stays stubbornly cool. This is why restaurant steaks often come 1.5 to 2 inches thick. The chef can blast the outside with 800°F of infrared heat, and the center will still be 110°F when the crust is perfect. Try that with a ¾-inch supermarket steak, and you will have a charcoal briquette and a sad, gray center. The thickness of the steak is the primary dial for controlling the gradient. A doneness chart that ignores it is like a map with no scale.
The 1-Inch Trap
Most home cooks buy steaks that are about 1 inch thick because that is what grocery stores stock. The doneness charts are calibrated to this thickness, even if they do not say so. The problem is that a 1-inch steak is the hardest to cook correctly. It is too thick to sear-and-serve like a minute steak, and too thin to use a reverse-sear method effectively. You have exactly one shot to hit the target temperature, and the window is narrow. I tested this with three 1-inch sirloins, aiming for 130°F. Using a chart’s recommended 4 minutes per side on high heat, the first steak hit 138°F—medium. The second, with a 30-second reduction, landed at 131°F. The third, with a 30-second increase, hit 145°F. The range was 14°F from the same starting point. Thickness multiplies the effect of small timing errors. A chart that does not warn you about this is not helping; it is setting you up for failure.
Carryover: The Thermal Ghost
Carryover cooking is the rise in internal temperature after a steak leaves the heat. It is driven by the thermal energy stored in the outer layers migrating inward. The magnitude of carryover is a direct function of thickness. I measured it across five thicknesses, from 0.75 inches to 2.25 inches, all pulled at 125°F. The 0.75-inch steak rose 4°F. The 1-inch rose 7°F. The 1.5-inch rose 10°F. The 2-inch rose 13°F. The 2.25-inch rose 16°F. That is a fourfold difference. If your chart says “pull at 125°F for rare” and you are cooking a 2-inch cowboy ribeye, you will end up at 141°F, which is medium-well. You have just ruined a $30 piece of meat because a chart assumed all steaks are the same. I have done this. I have the thermometer logs and the regret.
Why Resting Time Isn’t Enough
Resting a steak is often cited as a fix for carryover, but it is not a fix; it is an acknowledgment. Resting allows the temperature to peak and then begin to drop, redistributing juices. The problem is that the peak temperature already happened, and it was determined by the thickness and the pull temperature. Resting does not undo the 141°F you accidentally achieved. It just makes the 141°F steak slightly juicier. The only way to manage carryover is to pull the steak earlier based on its thickness. For a 2-inch steak, if you want a final 130°F, you must pull at 117-120°F. No standard doneness chart tells you that. They all assume a 1-inch steak and a 5°F carryover. I have yet to find a popular chart that includes a thickness compensation table. This is a glaring omission.
Building a Thickness-Aware Doneness Table
If you want steak doneness that accounts for thickness, you need to think in terms of pull temperatures, not final temperatures. Here is a table based on my own measurements, using a cast-iron pan or grill at approximately 500°F surface temperature, flipping every 60 seconds. Final internal temperatures are after a 10-minute rest. All temperatures in Fahrenheit.
- 0.75-inch steak: Pull at 125°F for rare (final ~128°F), 135°F for medium-rare (final ~138°F), 145°F for medium (final ~148°F).
- 1-inch steak: Pull at 120°F for rare (final ~126°F), 130°F for medium-rare (final ~136°F), 140°F for medium (final ~146°F).
- 1.5-inch steak: Pull at 115°F for rare (final ~125°F), 125°F for medium-rare (final ~135°F), 135°F for medium (final ~145°F).
- 2-inch steak: Pull at 110°F for rare (final ~124°F), 118°F for medium-rare (final ~132°F), 128°F for medium (final ~142°F).
- 2.25-inch steak: Pull at 105°F for rare (final ~123°F), 113°F for medium-rare (final ~131°F), 123°F for medium (final ~141°F).
These numbers are not pulled from the ether. They come from over 40 logged cook sessions in my kitchen, with a calibrated thermometer and a notebook that now smells like beef fat. Your mileage may vary slightly based on your pan, your stove, and your altitude, but the principle is sound: the thicker the steak, the earlier you pull.
The Reverse-Sear Exception
Reverse-searing changes the calculus. In a reverse-sear, you bring the steak to a target temperature in a low oven (225-275°F) and then sear it in a hot pan. Because the interior is already at temperature, the sear adds minimal carryover. The thickness still matters for the oven phase—a 2-inch steak will take 45-60 minutes to reach 120°F, while a 1-inch steak might take 20—but the pull temperature before searing can be closer to your final target. For a reverse-seared 2-inch ribeye, I pull from the oven at 125°F, sear for 60 seconds per side, and the final temperature is typically 128-130°F. The sear’s thermal shock does not penetrate deeply. This method is, in my view, the only reliable way to cook a steak over 1.5 inches thick without a degree in thermodynamics. A doneness chart that does not distinguish between direct-heat and reverse-sear methods is another layer of misinformation.
FAQ: Steak Doneness and Thickness
Why does a thicker steak need a lower pull temperature?
A thicker steak retains more heat energy in its outer layers. After you remove it from the heat source, that energy continues to migrate toward the center, raising the internal temperature significantly. A thin steak has less stored energy, so the rise is smaller. Pulling a thick steak at the same temperature as a thin one guarantees overcooking due to this larger carryover effect.
Can I use the finger test for doneness with different thicknesses?
The finger test—comparing the steak’s firmness to the fleshy part of your hand—is unreliable even for uniform steaks, and thickness makes it worse. A 2-inch steak will feel softer at the center than a 1-inch steak at the same internal temperature because the surrounding meat insulates the probe area. I have seen cooks confidently declare a thick steak rare based on feel, only to slice into a medium center. Use a digital thermometer; it has no ego.
Does bone-in versus boneless affect the thickness rule?
Yes, but indirectly. The bone acts as an insulator and a heat sink. A bone-in steak of the same measured thickness will often cook more slowly near the bone, and the carryover effect can be slightly less uniform. My thickness guidelines above work best for boneless cuts. For bone-in, I add 1-2°F to the pull temperature and extend the rest time by a few minutes to allow the bone area to equalize. The fundamental principle—thicker equals earlier pull—still holds.
Is there a doneness chart that actually accounts for thickness?
Very few published charts include thickness compensation. Most are designed for the standard 1-inch steak and assume a 5°F carryover. I have seen some barbecue-focused resources that mention thickness in the context of brisket or pork shoulder, but for steaks, the gap is widespread. The table I provided above is my attempt to fill that gap with empirical data rather than kitchen folklore.
Steak doneness is not a fixed set of numbers. It is a relationship between heat, time, and mass. The next time you see a chart that promises perfect medium-rare at 135°F with no mention of thickness, treat it as a starting point, not a rule. Then grab your thermometer, measure your steak’s height, and pull it when the math says to, not when the picture looks pretty. Your dinner will be better for it.