This cooking conversion chart and recipe scaler helps you adjust recipes with less guesswork, whether you are cooking for two, feeding a crowd, converting cups to grams, or changing an oven temperature. Use the tables as practical starting points, then confirm the recipe’s texture, pan size, and cooking cues as you work.
Overview
Recipe measurements usually fall into three groups: volume, weight, and temperature. Volume measures include cups, tablespoons, and teaspoons. Weight measures use grams, kilograms, ounces, or pounds. Temperature is commonly listed in Fahrenheit or Celsius. These systems are related, but they are not interchangeable without context.
A cup of water and a cup of flour occupy the same volume, but they do not weigh the same. That is why a cups-to-grams conversion depends on the ingredient. For baking, weighing ingredients is often the more consistent option because flour can be packed or loosely scooped. For everyday cooking, volume measurements are usually convenient and sufficiently practical.
Quick volume conversion chart
| Measurement | Equivalent |
|---|---|
| 1 tablespoon | 3 teaspoons |
| 1/4 cup | 4 tablespoons |
| 1/3 cup | 5 tablespoons plus 1 teaspoon |
| 1/2 cup | 8 tablespoons |
| 2/3 cup | 10 tablespoons plus 2 teaspoons |
| 3/4 cup | 12 tablespoons |
| 1 cup | 16 tablespoons or 48 teaspoons |
| 1 US cup | Approximately 237 milliliters; many kitchen references round this to 240 milliliters |
Use the measuring system stated by the recipe. A US cup, a metric cup, and an Australian cup are not identical, although the difference may be minor in some savory recipes. Precision matters more when scaling cakes, pastry, bread, and other baking recipes.
Temperature reference
| Fahrenheit | Celsius, approximate |
|---|---|
| 250°F | 120°C |
| 300°F | 150°C |
| 325°F | 165°C |
| 350°F | 175°C |
| 375°F | 190°C |
| 400°F | 205°C |
| 425°F | 220°C |
| 450°F | 230°C |
For a more complete oven temperature converter, see our oven temperature conversion guide. A fan or convection oven often cooks more quickly or at a lower setting than a conventional oven, so follow the recipe’s stated oven type when possible.
How to estimate with a recipe scaler
The basic recipe-scaling formula is:
New quantity = original quantity × new servings ÷ original servings
For example, a recipe that serves four and uses 2 cups of rice can be scaled to six servings as follows: 2 × 6 ÷ 4 = 3 cups. Apply the same multiplier to each ingredient. In this case, the multiplier is 1.5.
- Identify the recipe’s original serving size.
- Choose the number of portions you need.
- Divide the new serving size by the original serving size.
- Multiply every ingredient by that number.
- Round measurements to practical kitchen amounts, while keeping important ratios intact.
Scaling down is just as useful. To halve a recipe, multiply each ingredient by 0.5. One tablespoon becomes 1 1/2 teaspoons, 1 cup becomes 1/2 cup, and two eggs become one egg. For an odd number of eggs, beat the eggs together and measure the required portion by weight or volume rather than guessing.
Scaling does not always mean doubling the cooking time. A larger quantity may need a wider pan, extra batches, or more time to return to a simmer, while a smaller portion may finish sooner. Use internal doneness, tenderness, bubbling, and visual cues alongside the clock.
Inputs and assumptions
A reliable serving size calculator needs more than a number. Check these inputs before changing a recipe:
- Original yield: Confirm whether the recipe serves four people, makes four portions, or produces four individual items.
- Ingredient form: “One onion” can vary considerably, while a weight gives a clearer target. Note whether vegetables are whole, chopped, drained, or cooked.
- Measurement system: Decide whether the recipe uses US volume, metric volume, or weight.
- Pan capacity: A doubled cake batter may overflow the original pan. Divide it between pans rather than filling one too high.
- Ingredient ratios: Baking powder, salt, yeast, and strong flavorings sometimes need cautious adjustment when a recipe is greatly enlarged.
- Equipment limits: A crowded sheet pan browns differently from a loosely filled one, and an overcrowded skillet may steam food instead of searing it.
Weight conversions require ingredient-specific assumptions. As useful kitchen approximations, one US cup of plain flour is often treated as about 120 grams, granulated sugar about 200 grams, and butter about 227 grams. These are reference values, not universal laws: brand, packing method, humidity, and ingredient type can change the result. When a recipe provides grams, use those grams rather than converting back to cups.
Do not confuse fluid ounces with ounces by weight. Fluid ounces measure volume; ounces on a kitchen scale measure mass. Water is close to a one-to-one comparison in some common units, but oil, flour, syrup, and other ingredients behave differently.
Worked examples
Halving a soup recipe
A soup serves eight and calls for 6 cups of stock, 4 carrots, and 2 cans of beans. To make four servings, use 3 cups of stock, 2 carrots, and 1 can of beans. Keep an eye on salt because canned beans and stock vary in seasoning. Add less at the beginning and adjust after the soup simmers.
Scaling a casserole for a family dinner
A pasta bake serves six and uses 12 ounces of pasta, 3 cups of sauce, and 2 cups of cheese. For ten servings, the multiplier is 10 ÷ 6, or approximately 1.67. The estimated quantities become 20 ounces of pasta, 5 cups of sauce, and about 3 1/3 cups of cheese. Rather than forcing all of it into the original dish, use a larger casserole or two smaller dishes. The food may need a little extra time to heat through, but it should be checked by temperature and bubbling rather than automatically adding 67 percent more cooking time.
Converting a baking recipe
If a cake recipe uses 2 cups of flour and you want to make one and a half times the recipe, the calculated amount is 3 cups. If the recipe lists flour by weight, multiply the listed grams instead. For eggs, whisk the eggs in a bowl, weigh the total, and use the scaled portion. This is more dependable than trying to divide a whole egg by appearance.
For baking problems caused by a change in elevation, consult our guide to altitude baking adjustments. If a scaled cake sinks, spreads, or turns dense, the baking troubleshooting guide can help separate a measurement issue from an oven or mixing issue.
When to recalculate
Recalculate whenever the serving target, ingredient form, equipment, or measurement system changes. Do it before shopping if the new quantity affects package sizes, and again before cooking if you have substituted a drained, frozen, concentrated, or pre-cooked ingredient.
For meal planning, scale recipes before building the grocery list. A weekly family meal plan can help organize the resulting quantities, while the 30-minute dinner planner is useful when you need smaller, faster meals during the week.
Before starting, write the original servings, target servings, and multiplier at the top of the recipe. Convert awkward amounts into practical measures, keep a scale nearby for flour and other baking ingredients, and leave seasoning slightly adjustable until the dish is finished. That simple check turns a conversion chart into a repeatable recipe scaler you can use for everyday dinners, meal prep, and baking.
