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Serving Size Calculator

Serving Size Calculator from Gizcalc helps you estimate results quickly within the Food & Nutrition category.

  • Instant results
  • Charts & tables
  • Save & compare
  • Private – runs in your browser
Serving Size —

Sample inputs are pre-filled so you can see a result quickly. Results are estimates only and may not be accurate because prices, interest rates, taxes, fees, fuel costs, tariffs, market returns, medical costs, and local rules can change. Please verify current values before making financial, tax, legal, medical, or business decisions.

Formula used

Serving = Total weight ÷ Servings; Portion for target = Target kcal ÷ kcal per 100 g × 100

About the Serving Size Calculator

What is the Serving Size Calculator?

This serving size calculator splits a batch of food into equal portions by weight.

Add calories per 100 g to see calories per serving or the portion for a calorie target.

How to use the Serving Size Calculator

  1. Total Cooked Weight (g) (sample: 1,200)
  2. Number of Servings (sample: 6)
  3. Calories per 100 g (optional) (sample: 150)
  4. Target Calories per Serving (optional) (sample: 0)
  5. Press Calculate Servings (results also refresh as you type). The result card shows the Serving Size, along with Calories per serving, Total calories in the dish and Tip.

Formula used

Serving = Total weight ÷ Servings; Portion for target = Target kcal ÷ kcal per 100 g × 100

Worked example

These are the sample values already filled in the calculator above, and the result it returns for them:

InputSample value
Total Cooked Weight (g)1,200
Number of Servings6
Calories per 100 g (optional)150
Target Calories per Serving (optional)0
ResultValue
Serving Size200 g
Calories per serving300 kcal
Total calories in the dish1,800 kcal
TipWeigh the empty pot first, then the pot with food, to get the cooked weight

Tips for using the Serving Size Calculator

  • A kitchen scale makes portion control far easier than cups and katoris.
  • Portion food into boxes straight after cooking for meal prep.

Frequently asked questions

Weigh the empty pot, then the pot with food, and subtract.

It depends on the food – for example 150 g cooked rice, 1 katori dal or 2 medium chapatis.

Use the recipe calorie calculator with the cooked weight.