About this Recipe Scaler
Cooking for a crowd or just for two? Adjusting recipes isn't always as simple as doubling everything mentally. This tool provides a precise ratio to scale any ingredient amount up or down while maintaining the correct flavor balance.
Who this calculator is for
- Home cooks scaling recipes up or down for different serving counts.
- Bakers and meal planners who need to keep ingredient ratios consistent.
- Hosts cooking for a party without guessing at ingredient amounts.
When to use it
- Double a recipe for more guests.
- Cut a recipe down for one or two servings.
- Scale a single ingredient while keeping the full recipe ratio intact.
How to use this calculator
- Enter the Original Servings the recipe yields (e.g., 4 people).
- Enter your Desired Servings (e.g., 10 people).
- Enter the quantity of an Ingredient to see its new required amount.
Key assumptions
- Ingredient quantities scale linearly unless the recipe says otherwise.
- The tool does not convert between units.
- Cooking time, pan size, and seasoning intensity may need separate adjustment.
Accuracy and testing
Review formula sources, default test cases, assumptions, unit handling, rounding rules, and changelog for this calculator.
How this calculator works
Scaling Factor = Desired Servings / Original Servings
New Amount = Original Amount × Scaling Factor
Inputs explained
Servings
The number of portions or people the recipe feeds.
Ingredient Amount
The numerical quantity (e.g., 1.5 cups, 200 grams).
Understanding your results
The Scaling Factor (e.g., 2.5x) tells you to multiply every ingredient in your recipe by that number. The New Amount shows the calculation for the specific ingredient you entered.
Example scenarios
Double Batch
Original 4, Desired 8. Ratio = 2.0. If recipe calls for 1 cup flour, use 2 cups.
Scaling Down
Original 6, Desired 2. Ratio = 0.33. If recipe calls for 3 eggs, use 1 egg.
Key Features
- Works for any unit
- Instant Ratio Calculation
- Precise Math
Things to Keep in Mind
Does not convert units (e.g., cups to grams). Baking times and pan sizes may need adjustment.
Tips & Best Practices
- While ingredients scale linearly, cooking times usually do not. A larger cake takes longer to bake, but not double the time.
- For spices (salt, chili), consider scaling slightly less than the full ratio and tasting as you go.
Glossary of Terms
- Yield
- The amount of food a recipe produces.
- Scaling Factor
- The multiplier used to adjust ingredient quantities.