Food Safety Temperature Guide

Every food safety rule in existence reduces to a handful of temperatures. Learn the danger zone, the safe minimum internal temperatures, and the two-hour rule, and you've covered the overwhelming majority of foodborne illness prevention. This guide is the reference — bookmark it, print it, put it on the fridge.

The danger zone: 40–140°F

Bacteria multiply fastest between 40°F and 140°F — the "danger zone" — doubling in as little as 20 minutes. The rules that fall out of this:

• Keep cold food at or below 40°F.
• Keep hot food at or above 140°F.
• Never let perishable food spend more than 2 hours total in the danger zone (1 hour if the room is above 90°F). The clock includes time on the counter before cooking, at the table, and during cooling.

When in doubt, throw it out. Food that sat out for 2+ hours can carry enough bacteria to make you sick, and reheating doesn't help — heat kills live bacteria but not all of the heat-stable toxins they leave behind. The two-hour rule is the cheapest insurance you'll ever buy. ::

Refrigerator and freezer settings

• Refrigerator: 40°F or below — ideal 34–40°F. Verify with an appliance thermometer; the dial is not the temperature.
• Freezer: 0°F or below. At 0°F, bacteria stop growing and frozen food stays safe indefinitely.
• Storage limit: 2 hours in the danger zone total — then refrigerate, freeze, or discard.

Safe minimum internal temperatures

Food	Safe internal temperature
Poultry (chicken, turkey, duck)	165°F
Ground meat (beef, pork, lamb)	160°F
Whole cuts — beef, pork, lamb	145°F + 3 min rest
Fish and seafood	145°F
Egg dishes, casseroles	160°F
Reheated leftovers	165°F

Measure in the thickest part of the food with a food thermometer, avoiding bone and fat. The meat's color and juice color tell you nothing reliable — only the thermometer knows.

The hold-and-serve rules

When serving food, hold hot food above 140°F and cold food below 40°F. Use chafing dishes for hot and ice for cold, and check the clock: anything in the danger zone for more than 2 hours gets discarded, not saved. For buffets and potlucks, put out small portions and refresh them, keeping the bulk cold or hot in the kitchen.

Reheating rules

Reheat leftovers to 165°F throughout — steaming hot with no cold spots — and reheat only the portion you'll eat. Stir or rotate for even heating, and never reheat leftovers more than once. Leftovers reheated properly are safe; leftovers reheated "until warm" are a gamble with the danger zone.

Thawing rules

Thaw frozen food three safe ways: in the refrigerator (best — plan ahead), in cold water in a sealed bag (change the water every 30 minutes), or in the microwave (cook immediately after). Never thaw on the counter, where the outside enters the danger zone while the inside is still frozen.

For the fridge map that keeps everything in its proper zone, see how to store food in the refrigerator, and for the shelf life of every food at these temperatures, see the shelf-life chart.