Recipe Scaling Calculator
Scale any recipe up or down by servings.
Enter your values
Enter the original servings you are working with.
Enter the servings you need you are working with.
Enter the an ingredient quantity in g or ml.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Scaling factor
- 1.5×
- Your ingredient becomes
- 375
- Pan area should scale by
- 1.5× — e.g. 8" round → 9.8" round
- Bake time guidance
- Keep roughly the same
Quick answer
Scale ingredients by the ratio of new servings to original servings; bake time changes far less than quantity does.
New amount = original × (new servings ÷ old servings)
At a glance
| What it does | Scale any recipe up or down by servings. |
|---|---|
| Category | Food |
| Inputs needed | Original servings, Servings you need, An ingredient quantity |
| Main output | Scaling factor |
| Formula | New amount = original × (new servings ÷ old servings) |
| Cost | Free — no sign-up, no download |
How to use the Recipe Scaling Calculator
- 1Enter the recipe's original servings.
- 2Enter how many you need.
- 3Enter any ingredient quantity to scale it.
Inputs explained
- Original servings
- Enter the original servings you are working with.
- Servings you need
- Enter the servings you need you are working with.
- An ingredient quantity(g or ml)
- Enter the an ingredient quantity in g or ml.
Worked example
Using the values the calculator loads with:
Inputs
- Original servings4
- Servings you need6
- An ingredient quantity250 g or ml
Results
- Scaling factor1.5×
- Your ingredient becomes375
- Pan area should scale by1.5× — e.g. 8" round → 9.8" round
- Bake time guidanceKeep roughly the same
Frequently asked questions
Do I scale spices linearly?
No. Salt, chilli and strong spices should be scaled to about 75% of the linear amount, then adjusted to taste.
Does baking time double?
No. Heat penetration depends on depth, not total volume, so use pan size guidance and test for doneness.
What do I need to enter into the Recipe Scaling Calculator?
Just 3 values: original servings, servings you need, an ingredient quantity. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Recipe Scaling Calculator work out the answer?
Scale ingredients by the ratio of new servings to original servings; bake time changes far less than quantity does. It applies the formula New amount = original × (new servings ÷ old servings) and shows the working so you can check each step by hand.
Is the Recipe Scaling Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.