Recipe Scaler
Scale a recipe ingredient up or down for a different number of servings.
Results update as you type.
About this calculator
A recipe scaler adjusts an ingredient quantity when you cook for more or fewer people than a recipe was written for. Enter the original amount and how many servings it makes, then the servings you want — it multiplies the amount by the ratio, so halving or doubling is automatic.
Frequently asked questions
How do I halve or double a recipe?
Multiply every ingredient by the same factor: 0.5 to halve, 2 to double. Setting the desired servings to half or twice the original does this automatically — 2 cups for 4 servings becomes 4 cups for 8 servings.
Does scaling work for cooking times too?
No — only ingredient quantities scale linearly. Cooking times, pan sizes and oven temperatures do not double when you double a recipe, so judge those by doneness rather than multiplying them.
Results are estimates for general guidance only, not financial, medical or tax advice.