MundoKit

Recipe converter: cups to grams

Choose a King Arthur ingredient preset or a custom reference, then enter the amount and recipe multiplier. Presets use the source’s cup weights directly.

Inputs
Uses grams per cup directly from King Arthur’s ingredient chart, without assuming a cup volume in mL.
Examples: 1/2, 2 2/3, 2⅔, ½. Enter the unit separately.
Use 2 to double or 1/2 to halve.

Results

King Arthur all-purpose flour: estimated weight
320 g
Scaled recipe amount
2.666667 source cups
  • King Arthur ingredient weight chart: 120 g per cup. Uses the source’s cup convention directly; no milliliter volume is assumed.
  • Volume-to-mass conversion depends on ingredient packing and preparation.

Results update as you type. The share link stores your inputs after the # in the address, which is not sent to our server, but anyone you send it to can read them.

How it works

King Arthur presets multiply the amount in cups by the chart’s grams per cup: all-purpose flour uses 120 g and almond flour uses 96 g. These are source-specific ingredient weights. We do not assign the chart’s cup a milliliter volume. Use custom-reference mode for other cup sizes, spoons or milliliters.

Preset grams = cups × recipe multiplier × chart grams per cup
Custom scaled volume = amount × recipe multiplier × unit volume
Custom grams = scaled volume × reference grams ÷ reference volume

Custom mode uses FDA nutrition-label volumes: a default cup of 240 mL, tablespoon of 15 mL and teaspoon of 5 mL. Recipe cup volume is editable. Supply a matching ingredient weight and reference volume from a package, recipe or weighed measurement. The custom default of 120 g per 240 mL is only an arithmetic example.

No intermediate rounding is applied. Grams and milliliters display up to two decimals; scaled amounts and custom reference values use up to six. Smaller positive values use scientific notation with four significant digits. Results outside the finite numeric range produce an input error. Application limits cap quantities and numeric references at 1,000,000 each.

Worked examples

King Arthur all-purpose flour: two and two-thirds cups

Select the all-purpose flour preset. Its published 120 g per cup gives 2⅔ × 120 = 320 g. Doubling gives 640 g. No milliliter conversion is needed.

A half tablespoon

In custom-reference mode, at an example reference of 120 g per 240 mL, ½ tablespoon is 7.5 mL. Multiplying by 120 ÷ 240 gives 3.75 g.

Different recipe and reference cups

In custom-reference mode, if you enter a 250 mL recipe cup and keep an example reference of 120 g per 240 mL, one recipe cup converts to 125 g. Changing the recipe cup does not alter the reference cup.

Frequently asked questions

How many grams are in a cup of flour?
King Arthur’s chart gives 120 g per cup of all-purpose flour and 96 g per cup of almond flour. Choose the matching preset. Other ingredients and preparations can differ; use a matching custom reference when needed.
Can I paste 2⅔ or ½?
Yes. Common Unicode fractions, slash fractions such as 2/3, mixed fractions such as 2 2/3, and decimals are accepted. Enter the unit in its separate selector, not in the quantity field.
Does choosing an ingredient load a density?
The sourced ingredient selector loads a published grams-per-cup weight. The custom ingredient field only labels your result; you supply its weight and volume. Preset cups do not use the FDA 240 mL assumption.
Which tablespoon does this use?
A fixed 15 mL tablespoon and 5 mL teaspoon, following the FDA nutrition-label convention. For a different spoon size, select milliliters and enter the total volume instead.
Can I halve or double a recipe?
Yes. Enter 1/2 or 2 as the multiplier. Zero ingredient amounts are accepted, but the multiplier, cup volumes and reference weight must be positive. Quantities and numeric references are capped at 1,000,000 each.

Sources

Last reviewed 2026-11-14. The method is written out above so you can check our math.