How do I hit the doneness I want?
Pull the steak 3°C below target — it climbs while resting. Rare: pull 47°C, serve 49–52°C (cool red center). Medium-rare: pull 51°C, serve 54–57°C (warm red — the steakhouse default). Medium: pull 57°C, serve 60–63°C (pink, firmer). Medium-well: pull 63°C, serve 65–68°C (a whisper of pink). Well-done: 71°C+ — cook it slower and gentler to keep any juice. An instant-read thermometer beats every finger trick ever invented.
Why rest the steak, and for how long?
Heat drives the juices toward the center; resting lets the muscle relax and reabsorb them. Cut too early and they flood the board instead of staying in the meat. Rest 5 minutes for a standard steak, 10+ for thick cuts and roasts — loosely covered, never wrapped tight (trapped steam softens your crust).