Kitchen calculators
Free kitchen calculators. Each shows its formula and its sources, and works without signing up.
Roasting and food safety
Times and temperatures from USDA.
Turkey thaw and roast time
USDA turkey thawing days in the refrigerator or cold water, and roasting time at 325°F, stuffed or unstuffed, by weight.
Safe cooking temperatures
The USDA safe minimum internal temperature for beef, pork, poultry, ham, fish, eggs and leftovers, with a check against your reading.
Leftovers storage time
How long cooked leftovers keep in the refrigerator and freezer, from the USDA cold storage chart, with a use-by date.
Brine calculator
How much salt for a wet or dry brine, by weight, for table salt, Diamond Crystal and Morton kosher salt. USDA poultry ratios.
Baking and candy
Swap pans, butter, yeast and eggs without guessing.
Baking pan converter
Convert a recipe between pan sizes, round or rectangular. Scale factor, batter depth change and bake time guidance from King Arthur.
Butter conversions
Convert butter between sticks, cups, tablespoons, teaspoons, ounces, pounds and grams.
Yeast conversions
Convert between instant, active dry and fresh (cake) yeast by weight, with packets and teaspoons for dry yeast.
Baker's percentage and sourdough
Baker's percentage and sourdough hydration calculator, counting the flour and water in your starter. Also starter feeding amounts.
Egg size conversion
Convert eggs between USDA sizes: peewee, small, medium, large, extra large and jumbo, using the USDA weight classes.
Candy temperature stages
Sugar syrup candy stages in °F and °C, with an altitude adjustment, from Colorado State University Extension.
Everyday kitchen math
Oven temperatures, rice, coffee, costs and nutrition.
Oven temperature converter
Convert oven temperatures between Fahrenheit, Celsius and gas mark, with the convection (fan) adjustment.
Rice to water ratio
How much water for each kind of rice: white, jasmine, basmati, brown and parboiled. USA Rice Federation ratios and cook times.
Coffee to water ratio
How much coffee for how much water, in grams, at any ratio from 1:15 to 1:18, or your own.
Recipe cost per serving
Work out what a recipe costs per serving from your own grocery prices. Weight, volume and count units.
Recipe nutrition per serving
Divide a recipe's total calories and nutrients by servings, with FDA Daily Value percentages and a calorie check.
Party food per person
How much to cook for a party by number of guests: mains, sides, appetizers, desserts and drinks. Iowa State University Extension amounts.
Looking for the converters and the recipe scaler? Free tools.
