Defrost Time Calculator
Calculate how long it takes to safely defrost meat, poultry, fish, and other foods.
Covers refrigerator, cold water, and microwave methods.
Defrost Time
Defrosting food correctly is a food safety issue, not just a cooking tip. Bacteria multiply rapidly in the “danger zone” — between 40°F (4°C) and 140°F (60°C). Improper thawing can cause serious illness even if you cook the food afterward.
The three safe methods:
1. Refrigerator thawing (safest)
- Temperature stays below 40°F (4°C) throughout
- Takes longer but requires no attention
- Food can remain in the fridge 1–2 more days before cooking
- Rule of thumb: ~5 hours per pound (500 g) for most meats; ~24 hours per 5 lb (2.3 kg)
2. Cold water thawing (faster)
- Submerge food in sealed bag in cold water (below 70°F / 21°C)
- Change the water every 30 minutes
- Cook immediately after thawing
- Rule of thumb: ~30 minutes per pound (500 g)
3. Microwave thawing (fastest)
- Use the defrost setting (30% power)
- Cook immediately — some areas may begin cooking during defrost
- Rule of thumb: ~6–8 minutes per pound (500 g)
Never thaw at room temperature — the outer surface reaches the danger zone while the center is still frozen.
Defrost time reference by food:
| Food | Weight | Refrigerator | Cold Water |
|---|---|---|---|
| Chicken breast | 500 g / 1 lb | ~5 hours | 30 min |
| Whole chicken | 2 kg / 4.4 lb | 24 hours | 2 hours |
| Ground beef | 500 g / 1 lb | ~5 hours | 30 min |
| Steak (thick) | 500 g / 1 lb | ~5 hours | 30–45 min |
| Fish fillet | 250 g / 0.5 lb | ~3 hours | 15 min |
| Pork chop | 500 g / 1 lb | ~5 hours | 30 min |
| Shrimp | 500 g / 1 lb | ~2 hours | 15–20 min |
Safe internal temperatures after cooking:
- Poultry: 165°F / 74°C
- Ground meat: 160°F / 71°C
- Whole beef/pork/lamb: 145°F / 63°C
- Fish: 145°F / 63°C