Ways to estimate turkey cooking times:

- USDA guidelines
- the simple rule “18 minutes per pound”
- (using weight in pounds)

The “18 minutes” rule works for some weights, but it doesn’t scale right for large turkeys. A wider range of accuracy is achieved by the simple formula, suggested by the late physicist and SLAC director Pief Panofsky. All of these assume the oven is set to 325 F.