How does the ingredient scaling work?

Each ingredient amount is multiplied by (target servings / original servings). For example, if the original recipe serves 4 and you want 12 servings, every ingredient is multiplied by 3.

Are the macro fields required?

No. Macros are optional. If you leave them blank, the tool still scales all ingredient amounts correctly. Fill in macros only when you want per-serving nutrition estimates.

What units can I use for ingredients?

Any unit you type is accepted — g, oz, cups, tbsp, tsp, ml, lbs, pieces, or anything else. The calculator scales the numeric amount while keeping your chosen unit label unchanged.

How accurate are the macro estimates?

Accuracy depends entirely on the values you enter. The tool divides your total-recipe macros by the target serving count. For precise tracking, use a nutrition database to look up exact macro values for your ingredients.

Can I add more than the default number of ingredient rows?

Yes. Click "Add Ingredient" to add as many rows as your recipe requires. You can also remove any row with the remove button on the right.

Meal Prep Calculator

Name: Meal Prep Calculator
Availability: InStock
Author: Nham Vu

Scale any recipe to your desired number of servings and estimate macros per serving for efficient weekly meal prep.

Serving Size

Original servings

Target servings

Ingredients

Ingredient Amount Unit

Macros (optional — for entire original recipe)

Leave blank to skip the nutrition panel.

Calories (kcal)

Protein (g)

Carbs (g)

Fat (g)

Fill in your recipe details and click Calculate to see scaled ingredients and macros.

Summary

Scale any recipe to your desired number of servings and estimate macros per serving for efficient weekly meal prep.

How it works

Set your recipe's original serving count and your target serving count.
Add each ingredient with its name, amount, and unit.
Optionally enter the total calories, protein, carbohydrates, and fat for the entire original recipe.
The calculator scales every ingredient amount automatically.
Macro totals are divided by your target servings to show per-serving nutrition.

Use cases

Scale a 4-serving dinner recipe up to 20 servings for the whole week.
Calculate exact ingredient quantities for a monthly meal prep session.
Track macros per serving when bulking or cutting in the gym.
Divide a large catering recipe down to a smaller household portion.
Plan grocery shopping lists by knowing exact scaled amounts.
Adjust a protein shake recipe to prepare multiple days at once.

Frequently Asked Questions

Last updated: 2026-07-01 · Reviewed by Nham Vu