Fish Cooking Time Calculator

The classic rule for fillets and steaks is about 4–5 minutes per centimetre of thickness at 200°C (400°F) in the oven. For a 2.5 cm fillet that means roughly 10–12 minutes. Thicker, denser cuts like swordfish or tuna steaks may need slightly longer.

The USDA recommends an internal temperature of 63°C (145°F) for fully cooked fish. Many chefs prefer to pull delicate fish at 57–60°C (135–140°F) for a moist, just-done texture, letting carryover heat finish the job.

Yes, significantly. Pan-frying and grilling use direct high heat and typically cook a fillet in 2–4 minutes per side. Poaching and steaming use gentler heat and may take slightly longer, while baking time varies with oven temperature.

For whole fish, a common guideline is 20–25 minutes per kilogram when baked at 180–200°C, or roughly 10 minutes per 500 g. Always check at the thickest part near the backbone — the flesh should be opaque and flake easily.

For grilling and pan-frying, flip once — cook about 60% of the time on the first side, then finish on the second. For baking, steaming, and poaching, no flipping is needed. Flipping too often breaks delicate fillets.

Insert a fork or thin knife at the thickest point and twist gently — properly cooked fish will flake apart in milky-white layers. The flesh should be opaque throughout. Translucent, glassy flesh means it needs more time.

If cooking from frozen, add approximately 50% more cooking time compared to thawed fish. It's always better to thaw fish overnight in the refrigerator for more even cooking and better texture.

Oily fish such as salmon and tuna have higher fat content, which conducts heat differently and gives them more tolerance for slight undercooking. Lean white fish like cod or tilapia become dry quickly if overcooked, so precise timing is more critical.