Cooking calculator

Recipe Scaler, Scale Any Recipe Up or Down by Servings

Scale any recipe up or down by target servings with automatic ingredient quantity adjustment. Handles fractions and mixed numbers.

Published by · Reviewed against primary-source formulas

Start each line with a number (e.g., "2 cups flour", "1/2 tsp salt", "3 eggs")

Scale Factor

–

Multiplier applied

New Servings

–

Target serving size

Scaled Ingredients

Enter ingredients above to see scaled results.

How CalcMesh scales a recipe

Scaling a recipe multiplies every ingredient by the ratio of your desired yield to the original yield, doubling a 4-serving recipe to 8 uses a factor of 2. We preserve ingredient proportions exactly so the balance of the dish is maintained.

We flag that cooking times, pan sizes and leavening do not scale linearly, which is why our output is a starting point rather than a guarantee; the scaling rules we apply are described in our methodology.

Recipe Scaling Guide

Scaling Tips

  • Small adjustments: Halving or doubling recipes usually works well without any modifications.
  • Large batches (3x+): Scale seasonings to 1.5x-2x instead of full 3x, then adjust to taste.
  • Pan size matters: When doubling, use a larger pan rather than crowding. Overcrowding affects browning and cooking evenness.

What Does Not Scale Linearly

  • Baking time: Increase by 25-50%, not proportionally. Check for doneness early.
  • Spices and salt: Start with 1.5x when doubling. Strong flavors intensify.
  • Yeast: When tripling bread recipes, use only 2x yeast and allow more rise time.
  • Baking powder/soda: Scale conservatively (use 75% of the calculated amount when tripling).
  • Oven temperature: Keep the same temperature when scaling. Only time changes.

Practical Measurement Rounding

When scaling produces odd fractions, round to the nearest practical measurement:

  • 0.33 tbsp = 1 tsp
  • 0.67 cup = 2/3 cup
  • 0.125 cup = 2 tbsp
  • 1.5 cups = 1 1/2 cups

Methodology & Assumptions

This calculator implements standard formulas drawn from primary-source authorities. Values are point-in-time estimates; consult a licensed professional for high-stakes decisions. See the per-input definitions and source citations below.

How this works

Computations are deterministic and run client-side, no inputs leave your browser. Formulas are derived from standard published formulas for the calculator's domain (mortgage, taxes, energy, conversions, etc.). When the underlying agency publishes updated rates or thresholds we refresh defaults and update the page's lastmod timestamp.

Frequently Asked Questions

Can I scale any recipe up or down?
Most recipes scale well for small adjustments (halving or doubling). However, baking recipes with leavening agents like baking powder or yeast may not scale linearly beyond 3x. Cooking times also change with volume, so always check internal temperatures rather than relying solely on the original timing.
How do I handle fractions when scaling?
This calculator automatically handles fractions. Enter ingredients as "1/2 cup flour" or "2 1/3 cups sugar" and the scaler will multiply correctly. For practical measuring, round to the nearest standard measurement (e.g., 1/4 tsp, 1/3 cup). A kitchen scale is helpful for odd amounts.
Do cooking times change when I scale a recipe?
Yes, but not proportionally. Doubling a recipe does not mean doubling the cooking time. Instead, increase time by about 25-50% and check for doneness frequently. For baked goods, monitor the center with a toothpick or thermometer. For meats, always use an internal temperature reading.
What ingredients should I be careful scaling?
Spices, salt, and leavening agents (baking powder, baking soda, yeast) should be scaled conservatively. When doubling, use only 1.5x the seasoning and adjust to taste. Garlic, chili, and strong herbs can become overpowering if simply doubled. Fat and sugar usually scale linearly.

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This page identifies the inputs, method, and limitations behind its estimates. Calculator outputs are not professional advice and should be checked against the relevant primary source for a consequential decision. This calculator's formula and defaults are drawn from standard published sources for its domain, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.

Inputs, defaults, and authoritative sources
Input Default Source / authority
All inputs Domain-typical defaults Editorial methodology, CalcMesh 2026