Cooking & Kitchen

Two kitchen-specific temperature tools. The oven converter handles °C / °F / UK gas mark with an optional fan-oven adjustment (UK convention: subtract 20°C / 25°F when using fan). The meat doneness reference is the USDA Food Safety and Inspection Service guide to safe minimum internal temperatures for poultry, beef, pork, seafood, eggs, and reheated leftovers.

Use the oven converter when translating a recipe between countries' temperature conventions. Use the meat doneness checker when verifying that a cooked food has reached the safe internal temperature for its category.

When to use these tools

Oven conversions show up frequently in cookbooks: UK recipes use gas marks (1-9) or fan-adjusted Celsius; U.S. recipes use Fahrenheit; continental European recipes use straight Celsius. The converter handles all three plus the fan/conventional distinction common in UK and EU appliances.

Meat doneness is a food-safety reference, not a culinary one — internal temperatures listed are the USDA-FSIS minimum to kill pathogens, not the chef's preferred doneness for taste. For example, the USDA minimum for ground beef is 160°F (71°C) regardless of how the cook would describe doneness.

Frequently Asked Questions

What is gas mark conversion?

UK gas mark is a quarter-scale temperature index for older gas ovens: gas mark 1 = 275°F = 135°C, with each gas mark step ≈ 25°F = ~14°C. Newer UK ovens display Celsius directly; older or basic models still use the gas mark dial.

What's the fan-oven adjustment?

UK convention: subtract 20°C (or 25°F) from a conventional-oven temperature when using a fan oven, because the circulating air transfers heat more efficiently. The oven converter shows both side-by-side.

Why does the USDA list different temperatures for different meats?

Different pathogens occur on different meats and have different thermal-death points. Poultry needs 165°F (74°C) for Salmonella; ground beef needs 160°F (71°C) for E. coli O157:H7; whole muscle cuts (steaks, chops) need 145°F (63°C) plus a 3-minute rest. Always cook to the USDA temperature even if the cut looks done by color or texture.

Is medium-rare safe?

For whole-muscle beef, lamb, and veal, the USDA minimum of 145°F (63°C) with a 3-minute rest corresponds to medium-rare doneness and is considered safe. For ground meats and poultry, medium-rare is below the USDA minimum and not recommended for food-safety reasons.