Recipe Serving Size Converter
Use this recipe serving size converter to scale a recipe to the number of servings you actually need. Enter the original servings and your target, and it gives the exact multiplier to apply to every ingredient — plus an instant conversion for any single amount you type in.
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Scale your recipe
Enter values above and press Calculate to see your result.
Formula used
Scaling a recipe is a single multiplier applied to every ingredient:
Scaling factor = desired servings ÷ original servingsNew amount = original amount × scaling factor
Multiply each ingredient by the same factor. Cooking and baking times do not scale linearly — judge doneness instead.
Worked examples
Scaling up. From 4 to 6 servings, the factor is × 1.5; 200 g of an ingredient becomes 300 g.
Scaling down. From 8 to 3 servings, the factor is × 0.375.
Doubling. From 6 to 12, multiply everything by × 2.
How to use this calculator
- Enter the servings the recipe currently makes.
- Enter how many servings you want.
- Optionally enter one ingredient amount to convert.
- Press Calculate to get the multiplier and the scaled amount.
- Apply the multiplier to every ingredient in the recipe.
Quick scaling factors
| From → to servings | Factor |
|---|---|
| 4 → 2 | × 0.5 |
| 4 → 6 | × 1.5 |
| 4 → 8 | × 2 |
| 6 → 4 | × 0.667 |
| 2 → 5 | × 2.5 |
| 10 → 3 | × 0.3 |
Multiply each ingredient by the factor; round sensibly for eggs and whole items.
Who should use this converter
Anyone cooking for a different crowd than a recipe was written for — halving a dinner for two, tripling for a party, or adjusting a baking recipe to fit a pan. It works for any units because it is just a multiplier.
Tips for scaling well
- Eggs and whole items don't divide neatly — round to the nearest whole and adjust liquid slightly.
- Salt and strong spices can be scaled a touch under the factor; taste and adjust.
- Pan size matters when scaling bakes — a thicker or thinner layer changes the bake time.
Why cooking time doesn't scale
Doubling a recipe does not double the cooking time. Heat transfer depends on thickness and surface area, not total mass. A larger batch in the same-depth pan often cooks in a similar time; a deeper pan takes longer. Always check doneness with a thermometer or by feel rather than multiplying the clock.
Limitations of this converter
The tool scales quantities, not technique. Very large or very small scaling can change texture (especially in baking), and times, temperatures and pan choices may need adjusting by judgement.
Frequently asked questions
How do I scale a recipe to more servings?
Divide the desired servings by the original to get a multiplier, then multiply every ingredient by it. This tool does the math for you.
Does cooking time scale with servings?
No. Time depends on thickness and surface area, not total amount. Check doneness rather than multiplying the time.
How do I handle eggs when scaling?
Round to the nearest whole egg and adjust other liquids slightly. For half an egg, beat one and use about half by weight.
Can I scale baking recipes?
Yes, but watch pan size and leavening. Large changes in batter depth affect rise and bake time more than savory cooking.
What units does it work with?
Any — grams, millilitres, cups, ounces — because the factor is unitless. Apply it to whatever the recipe uses.