What this calculation means
Recipe scaling applies one proportional factor to each included ingredient. The first quantity and all additional rows are calculated independently, so grams, milliliters, and countable pieces never become one mixed-unit total.
This is a proportional planning calculation, not a validated new recipe. Large changes can alter seasoning, leavening, thickening, liquids, equipment capacity, cooking time, and finished yield. Test the adjusted recipe. Fractional pieces are theoretical quantities; the tool does not round eggs or packages for you.
How to use this calculator
Enter the first ingredient quantity and optional name and unit. Enter a positive scale factor. Add any additional ingredients with their own original quantities and units. Review the scaled-quantity table; remove unused rows or leave them completely blank.
Formula and variables
Scaled quantity = Original quantity × Scale factor
- Original quantityrecipe unit
- Quantity in the original recipe.
- Scale factor×
- Use 2 to double or 0.5 to halve.
- First ingredient name
- Optional name of the first ingredient; omitted names receive a neutral row label.
- First ingredient unit
- Optional unit label for the first quantity. Each additional row keeps its own unit; no conversions are performed.
- Additional ingredient
- Each row has an original quantity and optional name and unit. Scaled quantity = original quantity × the same unrounded recipe factor. Unit labels are carried through unchanged.
The main quantity displays up to two decimals; table quantities display up to six decimals. Intermediate factors and quantities are not rounded before calculation. Very small nonzero quantities below table precision are marked rather than shown as zero. No automatic unit conversion or whole-item rounding is applied.
Understand your result
The main result is the scaled first ingredient. The table lists original and scaled quantities for every included ingredient and retains each row’s unit. The displayed factor is explanatory; calculations use the unrounded ratio.
Worked example
Triple a recipe containing 2.5 kg flour, 250 ml milk, and 2 eggs.
Original quantity: 2.5 recipe unit
Scale factor: 3 ×
First ingredient name: Flour
First ingredient unit: kg
Additional ingredient 1: Milk: 250 ml
Additional ingredient 2: Eggs: 2 pieces
- The factor is the entered 3; no factor is inferred from the ingredient amounts.
- Flour: 2.5 × 3 = 7.5 kg. Milk: 250 × 3 = 750 ml. Eggs: 2 × 3 = 6 pieces.
- Each quantity remains separate in the result table; kilograms, milliliters, and pieces are not summed.
Example result: 7.5 kg
Frequently asked questions
How do I halve a recipe?
Use a scale factor of 0.5. Keep the original quantity unit; the result does not introduce a new unit or automatically round to a purchasable pack.
Does scaling also round pack purchases?
No. It returns a recipe quantity. Whole-pack purchasing is a separate decision after accounting for preparation yield.
Can ingredients have different units?
Yes. Put each quantity in one unit per row, for example 500 g flour and 250 ml milk. A mixed expression such as 1 lb 4 oz must first be converted to one numeric quantity. The tool scales each row without adding unlike units or guessing a density.
Does this scale seasoning and cooking time automatically?
All entered ingredient rows receive the arithmetic factor. The calculator does not recommend adjustments for seasoning, leavening, thickening, water, time, or equipment. Confirm the resulting recipe with a kitchen test.