The ideal temperature for a refrigerator should be maintained between 37°F (3°C) and 40°F (5°C) to keep food fresh and safe from harmful bacteria growth

. More specifically, aiming for around 35°F to 38°F (1.7°C to 3.3°C) is often recommended as it is close to freezing without causing food to freeze

. Temperatures above 40°F (4-5°C) enter the "danger zone" where bacteria can multiply rapidly, increasing the risk of food spoilage and illness

. In Celsius, the widely accepted safe range is 0°C to 5°C , with many sources suggesting keeping it below 4°C for optimal safety

. The freezer should be set at 0°F (-18°C) or lower to keep frozen foods properly preserved

. Because fridge temperatures can vary inside the compartment, placing different foods on appropriate shelves according to their temperature needs can help maintain freshness

. Using a fridge thermometer is advisable to ensure accurate temperature readings, as the built-in thermostat may not always be precise

. Summary:

Temperature Scale| Ideal Fridge Temperature Range
---|---
Fahrenheit| 35°F to 40°F (best ~37°F)
Celsius| 1.7°C to 5°C (best ~3°C)

Freezer temperature should be at 0°F (-18°C) or below for safe storage. This range balances food safety, freshness, and energy efficiency.