CookCalc
Scale recipes, convert measurements, swap pan sizes, and calculate meal costs. Your kitchen math assistant.
Recipe Scaler
Scale any recipe up or down. Enter original servings and desired servings.
Grams to Cups Converter
Convert between grams, cups, tablespoons, and ounces for common ingredients.
Serving Size Adjuster
Adjust nutrition facts for a different serving size.
Baking Pan Conversion
Convert recipe quantities between different baking pan sizes and shapes.
Cost Per Serving Calculator
Calculate the cost per serving for any recipe from ingredient prices.
About CookCalc
CookCalc helps home cooks and professional chefs with kitchen math. Scale recipes up or down, convert between grams and cups, swap baking pan sizes, adjust servings, and calculate the cost per plate.
All tools run in your browser. Share a scaled recipe via URL — text it to your sous chef or bookmark it for next time.
Recipe scaling: scaling a recipe by a factor adjusts most ingredients proportionally, but leavening agents (baking powder, baking soda) scale at approximately 75% of the linear factor for doubles and triples — too much leavening produces a bitter, coarse crumb. Salt and spices also don't scale perfectly; start at 75% and adjust to taste. Cooking time does not scale linearly — a doubled batch in the same pan may need only 10–20% more time, while a larger pan may need less time due to thinner batter.
Temperature conversions: °C = (°F − 32) × 5/9. °F = (°C × 9/5) + 32. Common benchmarks: water boils at 212°F/100°C; medium oven is 350°F/175°C; high oven for roasting is 425–450°F/218–232°C. Candy temperatures: soft ball stage (235°F/113°C), hard ball (250°F/121°C), hard crack for lollipops (300–310°F/149–154°C). Meat internal temperatures (USDA): poultry 165°F/74°C; beef steaks medium 145°F/63°C with 3-minute rest; ground beef 160°F/71°C.
Unit conversions in cooking: 3 teaspoons = 1 tablespoon; 4 tablespoons = 1/4 cup; 16 tablespoons = 1 cup; 2 cups = 1 pint; 2 pints = 1 quart; 4 quarts = 1 gallon. Weight vs volume: 1 cup of all-purpose flour = approximately 120–130 grams (weighing is more accurate than volume for baking). 1 cup of granulated sugar ≈ 200 grams; 1 cup of packed brown sugar ≈ 220 grams; 1 cup of butter ≈ 227 grams (2 sticks).
Nutrition label math: calories from protein = grams × 4; calories from carbohydrates = grams × 4; calories from fat = grams × 9; calories from alcohol = grams × 7. Total calories = sum of all macronutrient calories. A food labeled "300 calories, 10g fat, 30g carbs, 15g protein" checks: (10×9) + (30×4) + (15×4) = 90 + 120 + 60 = 270 calories — the 30-calorie gap may be from fiber or rounding in reporting.