Recipe quantities and pan scaling

Lifestyle tools

Loading tool

The tool is loaded only when you open it.

All processing for this tool happens in your browser. Your input is not sent to a server.

About this tool

Scale ingredient fractions by servings or round, square and rectangular pan area or volume; convert compatible units and keep baking time separate.

Common uses

Scale a recipe while retaining exact fractions and compatible metric units.
Compare internal pan dimensions and explicitly chosen filling depths.

How to use it

1.Choose servings or pan geometry; enter original and target servings, or internal dimensions and the area/volume basis.
2.Enter ingredient names, nonnegative amounts and units; select output units within the same family.
3.Calculate, inspect the exact multiplier and all 50-row pages, copy the complete recipe or request its protected CSV.

Calculated recipe and pan examples

Four servings to six

4→6 servings; flour 1 1/2 kg, milk 250 mL→L, eggs 2 items

factor=3/2; 9/4 kg (2 1/4; 2.250000000000); 3/8 l (3/8; 0.375000000000); 3/1 each (3; 3.000000000000); pi_approximation=0

The exact 3/2 multiplier gives 2 1/4 kg, 3/8 L and 3 items.

Equal-depth round pans

Round diameters 18→24 cm; area basis, equal depth; flour 200 g

factor=16/9; 3200/9 g (355 5/9; 355.555555555556); pi_approximation=0

The diameter-squared ratio is 16/9; π cancels. Area scaling assumes equal filling depth.

Different filling depths

Round diameters 18→24 cm; filling depths 4→3 cm; volume basis; flour 200 g

factor=4/3; 800/3 g (266 2/3; 266.666666666667); pi_approximation=0

Area ratio 16/9 multiplied by depth ratio 3/4 gives exact 4/3.

Round pan to square pan

Round diameter 18 cm→square side 20 cm; equal depth; flour 200 g

factor=400000000000000000/254469004940773233; 80000000000000000000/254469004940773233 g (314 96732448597204838/254469004940773233; 314.380134502509); pi_approximation=1

The ratio uses π≈3.141592653589793. Its fraction is exact for that declared approximation, not physical π.

Limits and notes

1–200 ingredients. Names:100 UTF-16 units; custom unit labels:24. Numbers:12 integer digits, up to6 decimal places, or fractions/mixed fractions,64 characters. Servings and dimensions:0.000001–10000; ingredient quantities:0–1000000000; factor:0.000001–1000000; each scaled quantity≤1000000000000. CSV≤262144 bytes. CSV includes every ingredient, beyond the50-row preview, with the factor, exact/mixed fractions,12-place decimals, units and π-approximation flag. UTF-8 without BOM, CRLF. Formula-leading names/unit labels get an apostrophe. Spreadsheet applications may reinterpret fraction text; inspect the raw CSV for exact strings.
Use internal pan dimensions and planned filling depths, not the outside rim. 1 inch=2.54 cm. Round areas/volumes use π≈3.141592653589793; π cancels in a round-to-round ratio. Area scaling assumes equal depth. Volume scaling uses both supplied depths.
Convert mg/g/kg within mass or mL/L within volume. Mass and volume cannot be interchanged without ingredient-specific density. Custom cup/spoon labels keep the same unit; no universal cup size or density is assumed.
Decimal displays round half up to12 places. Tiny positive amounts can display zero; retain the exact fraction. A fraction involving the declared π approximation is exact for that approximation, not for physical π.
Baking time and temperature do not scale linearly with this factor. This tool only calculates quantities and geometry; it does not determine cooking time, doneness or food safety.

Frequently asked questions

Can the tool scale baking time?

No. Time and temperature are not multiplied by the ingredient factor; inspect your recipe and actual doneness separately.

Can grams be converted to cups or milliliters?

Only mg/g/kg or mL/L are converted within their family. Count and custom labels keep their unit; no ingredient density or universal cup size is inferred.

What pan model is assumed?

Use internal dimensions. Round pans are cylinders and square/rectangular pans are straight-sided prisms. Area mode assumes equal filling depth; volume mode uses both supplied depths. Tapered pans require a separate model.