Quick answer
A recipe for 4 calling for 2 cups of flour, scaled to 6 servings, needs 3 cups.
How it works
Multiply every ingredient by the same factor: the servings you want divided by the servings the recipe makes. Cooking times may need adjusting for much larger batches.
Formula
New amount = original amount × (new servings ÷ original servings)
Assumptions & limitations
- Results are rounded for display.
Formula and assumptions reviewed October 2026 by the Calculyn team. How we build our calculators
Frequently asked questions
Do I scale spices the same way?
Mostly yes, but for big scale-ups (3× or more) add strong spices gradually and taste as you go.
What about baking time?
Deeper or larger pans usually need longer at a slightly lower temperature. Check doneness early and often.