Double / Half Recipe Calculator

Quickly double, halve, triple or third any ingredient amount.

Usage Tip

Keep a note of the original recipe so you can scale back next time.

Adjusted Amount
After your chosen change
THE MATH
result = amount × multiplier
Apply the same multiplier to every ingredient in the recipe.
When halving recipes with eggs, beat one egg and use half by weight or volume.
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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.