Thanksgiving is two weeks from today. Whether you’re cooking for a big crowd or taking one dish to someone's house, there are lots of places online to turn to for cooking advice.

Converting ingredient measurements: If you’re using a recipe that lists the ingredient measurements in metric and you need to convert them, Epicurious has a useful Common Measurements and Equivalents tool. It also converts cooking temperatures from Celsius to Fahrenheit.

Substituting ingredients: What if your gravy recipe calls for corn starch, but you don’t have it? You can substitute flour, but should it be an equal amount? (No, you should use twice as much flour as you would cornstarch.) The Joy of Baking website has a great substitution chart that can help you solve problems like this one.

How much food you should serve: As a rule of thumb, most people buy 1 pound of turkey for each guest, and then add a few pounds if they treasure leftovers. But what about the mashed potatoes? How many potatoes should you use to make sure you have enough? Divine Dinner Party offers help in calculating quantities of food for parties.

Keeping your turkey safe: From defrosting the turkey to storing the leftovers, the USDA has all sorts of advice to make sure no one gets ill from the main course.

Safe stuffing: If stuffing isn’t cooked properly, it can harbor bacteria from the inside of your turkey. To make sure it’s safe, the USDA has handling instructions for stuffing.

Recipes: Your aunt asked you to bring cornbread for Thanksgiving dinner, but you’ve never made cornbread before. Turn to Allrecipes.com for recipe options as well as user ratings and comments on those recipes.  

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