Steak internal temperature

145°F (63°C)

plus a 3-minute rest

Cook steak to a minimum internal temperature of 145°F (63°C) and allow it to rest for at least 3 minutes, as measured with a food thermometer.

Use a food thermometer to check whether the meat has reached a safe minimum internal temperature.
Measure the temperature before removing the food from the heat source.

USDA states safe minimum internal temperatures, not doneness styles, so this page gives the USDA safe minimum rather than a target for a particular level of doneness.

Grounded in: foodsafety.gov, fsis.usda.gov. The number above appears verbatim in the linked government sources.

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