Food 1
USDA FoodData Central · FDC 171688 · Apples, raw, with skin (Includes foods for USDA's Food Distribution Program) · per 100 g, April 2018
52 kcal217.6 kJ · 100 g
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Food Calorie Calculator by Weight in Grams or Ounces
Enter the edible weight of each food to estimate calories per portion and for the whole meal. Use a USDA reference food or your own nutrition label.
Build your meal
Choose a verified USDA reference food or enter your own package label. Results update as you type.
How the numbers are calculated
Portion kcal = source kcal × edible grams ÷ source grams. kJ = kcal × 4.184. One ounce = 28.349523125 g. All calculations use unrounded values until display.
USDA presets are SR Legacy reference foods from April 2018, not exact values for your brand or recipe. Check the preparation state and use your package label when it differs. Do not enter milliliters as grams without a measured conversion.
This tool estimates food energy; it does not calculate personal calorie targets or exercise burn. Inputs stay in this browser and are not saved as a diary.
USDA data releaseGetting started
Choose a USDA reference food or enter a package label, weigh the edible amount in grams or ounces, then add more foods to see the meal total.
Before you use the result
USDA SR Legacy values are April 2018 references for the stated food and preparation. Brands and recipes differ; use your own label where available. This is not a personal calorie target.
Try an example
150 g of the listed raw apple: 52 × 150 ÷ 100 = 78 kcal.
How it works
Source energy × edible grams ÷ source grams. One kcal equals 4.184 kJ; one ounce equals 28.349523125 g.
Frequently asked questions
Convert verified food energy by edible weight and total a meal with your own label values.
How do I use Food Calorie Converter?
Choose a USDA reference food or enter a package label, weigh the edible amount in grams or ounces, then add more foods to see the meal total.
Does this tool upload my data?
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What should I check before using the result?
USDA SR Legacy values are April 2018 references for the stated food and preparation. Brands and recipes differ; use your own label where available. This is not a personal calorie target.