Recipe quantities · Your kitchen companion
Recipe scaler
Adjust ingredient amounts for the number of servings you want to make.
A little help in the kitchen
How to use it
Enter Original recipe servings and Servings to make. These count recipe portions, so partial portions such as 2.5 are allowed. Both must be positive, from 0.01 to 1000.
Edit the ingredient amounts, units and names. Decimals, fractions such as 1/2, and mixed amounts such as 1 1/2 are accepted. Add or remove rows for up to 20 ingredients.
Choose Recipe units to keep the original measurements, Metric for g/kg and mL/L, or US units for oz/lb and US cups/spoons. Metric preserves recipe cups and spoons. Choose Whole items for ingredients counted individually.
Choose Scale recipe. Read the ingredient list and any rounding hints, then save, share or print it. Check your recipe, cookware and doneness when changing a batch size.
How it works
Scaling factor = new servings ÷ original servings. Each ingredient amount is multiplied by that factor before conversion or rounding. For example, 6 ÷ 4 = 1.5, so 200 g becomes 300 g.
Spoons round to the nearest quarter of the selected spoon. Whole items round to the nearest whole number, with ties rounded upward and a round up or down hint. Whenever a measuring increment changes a quantity, the result also shows its scaled amount in the original unit. A positive amount that would round to zero is shown as less than the smallest increment, with its scaled quantity retained.
Other practical display increments are 1/8 cup, 1/8 oz or lb, 1/4 fl oz, 1 g or mL for amounts of 100 or more, 0.1 g or mL below 100, and 0.01 kg or L. These are display choices, not rules for how much an ingredient should be adjusted. Scaled figures use up to 12 significant digits for display.
The unit table records NIST's published conversion factors. US teaspoons, tablespoons, cups and fluid ounces are distinct from the labelled 5 mL teaspoon, 15 mL tablespoon and 250 mL cup. Metric output uses g/kg and mL/L while retaining recipe cups and spoons, so salt entered in teaspoons stays in teaspoons. US units use oz/lb and US spoons/cups. Weight stays weight, volume stays volume, and whole items stay counts. Ingredient names never supply an assumed density.
This tool scales ingredient quantities only. Cooking time does not follow the servings multiplier. Pan size, food depth and how the recipe cooks can affect the result; follow your recipe and appliance instructions and check doneness. Save keeps settings in this browser. A share link contains the settings in its fragment and recreates the result on the receiving device.
Frequently asked questions
How do I halve or double a recipe?
To halve a recipe, set new servings to half the original. To double it, use twice the original servings. Each ingredient uses the same factor, and the list then applies the measuring increments.
What do I do with half an egg?
Choose Whole items for counted eggs. If scaling produces a fraction, the tool shows a whole-item suggestion, its scaled quantity and a round up or down hint. Follow your recipe when deciding how to handle that fraction; rounding can change the ingredient balance.
Do cooking times change when I scale a recipe?
They may change, but the tool does not multiply cooking time. Check your recipe, pan size, food depth and doneness, and follow your oven or appliance maker's instructions.
What do Recipe units, Metric and US units mean?
Recipe units scales amounts without converting their units. Metric converts weights to g/kg and liquid-volume units to mL/L, while keeping recipe cups and spoons, such as teaspoons of salt. US units converts weights to oz/lb and volume to US cups or spoons. Whole items stay counts. Cups cannot become grams without an ingredient-specific weight, which this tool does not provide.
Which cup and spoon sizes does this use?
US measures are labelled US and use NIST's published factors. Separate metric options are labelled with their capacities: a 5 mL teaspoon, 15 mL tablespoon and 250 mL cup. Other recipes or measuring sets can use different sizes; enter their volume in mL rather than treating them as the listed spoon or cup.
Can I save, share or print the scaled recipe?
After scaling, save on this device or share a link containing your settings. Save as PDF includes the servings, scaled ingredients, rounding hints, cooking note and general disclaimer without generated dates or times. Delete my data clears saved settings and preferences. Very long or heavily encoded recipes may exceed the shared-link limit; the tool reports that instead of shortening your recipe.
