Enter your food type, the time it was taken out of refrigeration, and the current temperature to find out if your food is still safe. The Food Danger Zone Timer calculates how long your food has been sitting in the danger zone (40–140°F) and tells you whether it's safe to eat, approaching the 2-hour limit, or should be thrown out.
Safety Status
--
Total Time in Danger Zone
--
Safe Time Remaining
--
% of Safe Window Used
--
Recommendation
--
The danger zone is the temperature range between 40°F and 140°F (4°C–60°C). Within this range, bacteria that cause food poisoning such as Salmonella and Staphylococcus aureus can double in number every 20 minutes, rapidly reaching unsafe levels.
According to the USDA and FDA, perishable food should never be left in the danger zone for more than 2 hours. If the ambient temperature is above 90°F (32°C), that window shrinks to just 1 hour. After those limits, food should be discarded.
TCS stands for Time/Temperature Control for Safety. These foods — including meat, poultry, seafood, dairy, eggs, cooked rice, cut produce, and cooked beans — are high in moisture and nutrients that bacteria thrive on. They require careful temperature management to prevent unsafe bacterial growth.
Reheating food can kill some bacteria, but it does NOT destroy toxins that bacteria may have already produced while in the danger zone. If food has been out for more than 2 hours, the safest choice is to discard it — reheating may not make it safe.
No, the 2-hour limit is cumulative. If food was out for 1 hour, then refrigerated, and later taken out again, it only has approximately 1 hour of safe time remaining at room temperature. Always track total time spent in the danger zone.
Temperatures above 140°F (60°C) are considered the 'safe hot zone.' At these temperatures, bacterial growth is inhibited or bacteria are killed. Food held continuously at 140°F or above — such as on a warming tray — is generally considered safe for up to 4 hours in commercial food service settings.
The key is to keep cold foods cold (at or below 40°F) and hot foods hot (at or above 140°F). Use a food thermometer to verify temperatures, refrigerate leftovers within 2 hours, and never thaw food on the countertop — thaw in the fridge, under cold running water, or in the microwave.
No. High-protein, high-moisture foods like meat, eggs, seafood, and dairy pose the greatest risk because bacteria multiply rapidly in them. Dry, acidic, or high-sugar foods are generally less hospitable to bacterial growth, though any perishable food should still follow the 2-hour rule.