Recipe Scaler
Scale any ingredient amount when changing the number of servings.
About Recipe Scaler
A scale factor is found by dividing target servings by original servings, then every ingredient is multiplied by that factor. Linear scaling keeps ingredient proportions identical, which is far more reliable than guessing amounts when feeding a crowd.
Formula
Recipe Scaler
Scaled = original amount x (target servings / original servings)
- scale factor
- The multiplier applied to every ingredient
Worked example
With the default values below, Recipe Scaler returns Scale Factor of 2.000. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Original servingsminimum 1
- 4
- Target servingsminimum 1
- 8
- Ingredient amount
- 250
Results
- Scale Factor
- 2.000
- Scaled Amount
- 500.00
- Change
- Increase
Step by step
- 1Values used
- 2Recipe Scaler
- 3Scale Factor= 2.000
- 4Scaled Amount= 500.00
- 5Change= Increase
Assumptions and limits
- The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Recipe Scaler calculated?
Scaled = original amount x (target servings / original servings) A scale factor is found by dividing target servings by original servings, then every ingredient is multiplied by that factor.
Why does Recipe Scaler matter?
Linear scaling keeps ingredient proportions identical, which is far more reliable than guessing amounts when feeding a crowd.
What values do I need to enter?
This calculator takes 3 inputs: Original servings, Target servings, Ingredient amount. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.