Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Straight-sided circular pans and equal batter properties. Scaling quantity does not determine baking time or safe fill height.
Example Calculation
- Original pan diameter: 20 cm
- Original batter depth: 4 cm
- Original pans: 1
- New pan diameter: 25 cm
- New batter depth: 4 cm
- New pans: 1
One 25 cm pan at the same batter depth as a 20 cm pan needs 1.5625 times the recipe.
Frequently asked questions
How do I use this calculator?
Enter original pan diameter, original batter depth, original pans, new pan diameter, new batter depth, new pans. The result updates automatically. Use Reset to restore the example values.
What method does it use?
recipe multiplier=(new diameter² × new depth × new count)/(original diameter² × original depth × original count).. Straight-sided circular pans and equal batter properties. Scaling quantity does not determine baking time or safe fill height.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.