Scale recipe ingredients up or down for different serving sizes.
Recipe Scaler Calculator
Recipe Scaler
New = Original × (desired/original)
g
Scale Factor
1.50×
New Amount
300.0g
Portion Comparison
About this calculator
What is the Recipe Scaler Calculator?
Recipe Scaler Calculator scale recipe ingredients up or down for different serving sizes. It is part of Home of Calculators's Cooking & Food Calculators suite for recipe scaling, conversions, cooking times, and food preparation. The calculator is designed for cooks, bakers, home chefs, but anyone can use it. No signup, no ads, no tracking. Just accurate math, computed locally in your browser using a BigNumber-precision math engine.
Formula Reference
The Formula
New Amount = Original × (Desired Servings / Original Servings)
Recipe scaling adjusts ingredient quantities proportionally when changing the number of servings. The scaling factor is the ratio of desired servings to original servings, applied to every ingredient.
Variables
Original ServingsRecipe's original yieldDesired ServingsHow many you wantWorked Example
Original Servings = 4Desired Servings = 6
Result: Scale factor = 1.5×
How to use the Recipe Scaler Calculator
- 1
Determine the scaling factor
Divide desired servings by original servings.
- 2
Multiply each ingredient
Multiply every ingredient amount by the scaling factor.
- 3
Adjust cooking time
Cooking time may need adjustment — larger batches take longer, smaller batches less time.
Quick tips
- All calculations run locally in your browser; your data never leaves your device.
- For best results on mobile, rotate to landscape when entering many values.
- Bookmark this page to come back to your calculation anytime.
- Need a different calculator? Try our visual builder to create your own.
Why Home of Calculators
- 100% private (calculations run in your browser)
- 128-bit BigNumber precision (no rounding errors)
- Works on any device: phone, tablet, desktop
- Free forever (no signup, no ads, no upsells)
Frequently asked questions
Is the Recipe Scaler accurate?
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Yes. Home of Calculators uses a BigNumber-precision math engine (64-128 decimal digits) to ensure calculations are accurate. We run 96+ automated tests covering unit conversion, financial formulas, health formulas, and more. For critical decisions (financial, medical, legal), we still recommend consulting a qualified professional.
Is the Recipe Scaler Calculator free?
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Yes. Every calculator on Home of Calculators is 100% free, with no signup, no ads, and no hidden fees. The entire platform is free forever.
Do you store the values I enter?
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No. All calculations happen in your browser. We never see, store, or transmit your inputs to any server. Your data stays on your device.
Can I use the Recipe Scaler on my phone?
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Yes. Home of Calculators is fully responsive and works on any device (phone, tablet, laptop, or desktop). The interface adapts to your screen size.
Can I embed this calculator on my own website?
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Yes. Click the "Share" button to get an iframe embed code. The embedded calculator will look like any other Home of Calculators widget. You can also build a fully customized version using our visual builder.
Can I build my own custom calculator?
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Absolutely. Home of Calculators's visual builder lets you add fields, write formulas, choose a theme, and brand the result with your own logo, all without writing code.