PanRatio
Open calculator

Exact decimals · explicit pi

Scale the recipe to the pan, not the diameter.

PanRatio compares total base area and assumes the same batter depth. It never guesses baking time or temperature.

Local browser calculation

Pan area comparison

No recipe upload
Pan set named by the recipe
in
Pan set you will use
in
Optional quantity example
Unit-free: grams, cups, eggs, or another written quantity.

The factor preserves average batter depth by base area only. Pan capacity, wall shape, fill level, material, recipe behavior, oven, temperature, and doneness remain outside the result.

Recipe multiplier

Total-area ratio

Multiply every scalable quantity by×≈1.006016+≈0.6016%
MeasurementRecipe pansYour pans
Inside dimensions9 in × 18 in × 1
Total base area≈63.6173 in²64 in²
Area expression20.25 × π64
Original example amount200
Scaled example amount≈201.2033

64 ÷ 20.25 × π

The displayed ratio is approximate because pi remains in the formula; arithmetic uses a 50-digit pi value before final display rounding.