Portion Calculator
Calculate the perfect food portions for any meal or event. Scale recipes up or down for any number of guests. Whether you're meal prepping, hosting a party, or adjusting a recipe, this tool ensures you always have the right amount of food.
How the Portion Calculator Works
This calculator helps you determine the right amount of food for any situation. It offers two powerful modes:
- Food Portion Mode: Calculates the recommended serving size per person and total amount needed based on the number of people and type of food. Uses standard portion guidelines for different food categories.
- Recipe Scaler Mode: Scales any recipe up or down for your desired number of servings. Enter your ingredients and amounts, and the calculator handles the math.
Standard Portion Guidelines
Meat (main course): 150-200g (5-7 oz) per person
Fish: 120-150g (4-5 oz) per person
Pasta & Grains: 75-100g (2.5-3.5 oz) dry per person
Rice: 60-75g (2-2.5 oz) dry per person
Potatoes: 150-200g (5-7 oz) per person
Vegetables: 100-150g (3.5-5 oz) per person
Salad Greens: 30-50g (1-1.5 oz) per person
Dessert: 100-150g (3.5-5 oz) per person
Beverages: 250-350ml (8-12 oz) per person
Recipe Scaling Formula
Scaling Factor = Desired Servings ÷ Original Servings
New Amount = Original Amount × Scaling Factor
For example: If a recipe serves 4 and you need 6 servings, the scaling factor is 6 ÷ 4 = 1.5. Multiply every ingredient by 1.5 to get the new amounts.
❓ Portion Calculator FAQ
How much food should I serve per person?
Standard portions vary by food type: meat (150-200g), vegetables (100-150g), pasta/rice (75-100g dry), and desserts (100-150g). This calculator uses these standards to give you accurate totals.
How do I scale a recipe?
Enter the original number of servings and your desired number of servings, then add your ingredients with their amounts. The calculator will automatically scale each ingredient.
What is the scaling factor?
The scaling factor is the ratio of desired servings to original servings. For example, if a recipe serves 4 and you want 6, the scaling factor is 6/4 = 1.5. All ingredients are multiplied by this factor.
Can I convert between metric and imperial units?
Yes. The calculator supports both metric (g, kg, ml, L) and imperial (oz, lb, cups) units. Select your preferred system in the advanced options.
What are the standard portion sizes for meat?
For a main course, plan 150-200g (5-7 oz) of meat per person. For a side dish, reduce to 75-100g (2.5-3.5 oz) per person.
How much pasta do I need per person?
For dried pasta, plan 75-100g (2.5-3.5 oz) per person. For fresh pasta, 100-150g (3.5-5 oz) per person.
How much rice do I need per person?
For dried rice, plan 60-75g (2-2.5 oz) per person. This yields about 150-180g (5-6 oz) of cooked rice.
How do I calculate portions for a buffet or party?
For buffets, you can often reduce portions slightly since guests will eat from multiple dishes. Plan for smaller portions of each item and offer a variety of options.
What is the difference between a portion and a serving?
A portion is the amount of food you choose to eat. A serving is a standardized amount of food, often used on nutrition labels. This calculator helps you determine appropriate portions for meal planning.
Can I use this calculator for meal prep?
Absolutely! Calculate portions for multiple days of meals. For meal prep, multiply your per-person portion by the number of meals you're preparing.
How do I adjust portion sizes for children?
Children typically need smaller portions. As a general rule, use about half to three-quarters of the adult portion size, depending on age and appetite.
What is the best way to measure portions without a scale?
Use common visual cues: a serving of meat is about the size of a deck of cards (3 oz), a serving of pasta is about the size of a tennis ball (1 cup), and a serving of vegetables is about the size of your fist.
How do I scale a recipe with eggs?
Eggs can be tricky. For recipes requiring 1 egg, you can often use 2 eggs for doubled recipes. For fractional eggs, beat the egg and use the appropriate fraction (e.g., half a beaten egg).
Can I scale baking recipes?
Yes, but be careful. Baking is a science, and scaling can affect results. Use the calculator for ingredient amounts, but note that cooking times may also need adjustment.
How do I convert between weight and volume measurements?
This varies by ingredient. For example, 1 cup of flour is about 120g, 1 cup of sugar is about 200g, and 1 cup of butter is about 227g. Use a kitchen scale for the most accurate results.
What is the best way to estimate portions for a crowd?
Start with standard per-person portions, then add 10-15% extra for larger groups to account for variations in appetite. Offer a variety of dishes to accommodate different preferences.
Can I use this calculator for meal planning on a budget?
Yes! By calculating exact portions, you can buy the right amount of ingredients, reducing waste and saving money. The recipe scaler helps you use what you have efficiently.
How do I calculate portions for a potluck?
For potlucks, plan for each dish to serve about 8-10 people. The calculator can help you determine the total amount needed based on the number of guests and dishes.