Shape · inside size · pan count

Fit the recipe to the pans you actually have.

PanRatio compares ideal total base areas with exact decimal arithmetic, cancels pi only when mathematically valid, and labels every remaining approximation.

Calculate pan ratio

Dimensions and quantities stay in this browser. No account, recipe upload, backend, or database.

Three transparent steps

Measure, compare, then judge the bake

Use inside dimensions

Choose shape and count for both pan sets.

Read the area ratio

Exact ratios stay exact; pi-based ratios show ≈.

Keep oven decisions separate

Follow recipe, capacity, fill, and doneness guidance.

Focused pan geometry

Useful when the recipe names another pan

Round pan to round pan.
Round pan to square pan.
Several layers to one sheet pan.
One sample ingredient quantity.

Worked examples

Trace an exact and a pi-based conversion

Choose both shapes, inside dimensions, and pan counts. PanRatio calculates locally and keeps baking-time decisions outside the result.

View examples

Compare total pan area

Get the recipe factor without hiding the formula

Choose both shapes, inside dimensions, and pan counts. PanRatio calculates locally and keeps baking-time decisions outside the result.

Open PanRatio