Example 1
- Cups: 1
- Product: sugar
- Header: metric (250 ml)
200 g
1 × 200 g × (250/250) = 200 g of sugar.
Cup to Grams Calculator
Enter a cup count and pick a product. The calculator uses m = n × base × (V / 250 ml). Base per 250 ml: sugar 200 g, flour 130 g, rice 210 g, milk 255 g. On metric, one cup of sugar is 200 g; on a US 240 ml cup the same cup weighs 192 g. Sugar and flour match 0.80 and 0.52 g/ml on the ml to grams page.
Result
Enter a cup count. The result will appear here.
Arbitrary milliliters, not full cups, are on ml to grams. Spoons at 15 ml and 5 ml are on tablespoon and teaspoon.
How the results are calculated
n1 cup
base200 g
V250 ml
m200 g
The cup to grams calculator converts a cup count into product mass from a closed table. The formula is m = n × base × (V / 250 ml). Base is grams per 250 ml: sugar 200 g, flour 130 g, rice 210 g, milk 255 g. On metric V = 250 ml, so one cup of sugar is 200 g.
With US in the header the cup is 240 ml. The factor is 240/250 = 0.96, so one cup of sugar weighs 192 g. Two cups of flour at 250 ml give 260 g. Rice and milk use the same cup-volume scale.
Enter a cup count, for example 1 or 1.5, and pick a product from the list. A comma works the same as a period. Zero cups give mass zero. A negative number is rejected.
This is not the ml to grams page — there you enter any milliliters. It is also not the spoon page: 15 ml and 5 ml without product density belong there. Here you count full cups with the 250 ml table.
The result is not a lab measurement. Loose flour, packed sugar, or different humidity change the real mass. The metric/US switch changes cup volume and how mass is written in the result.
Enter 1 with sugar and check about 200 g. Then 2 with flour: about 260 g. On US, one cup of sugar weighs 192 g.
How to use this calculator
- Leave metric units in the header if the recipe uses a 250 ml cup.
- Pick sugar and enter 1. The result is about 200 g.
- Pick flour and enter 2. The result is about 260 g.
- Switch the header to US: that same one cup of sugar then weighs about 192 g.
- For arbitrary milliliters open ml to grams. For 15 ml and 5 ml spoons — the spoon page.
Formula
m = n × base × (V / 250 ml)
m in grams, n — cup count, base — g per 250 ml, V — cup volume (250 ml metric, 240 ml on US). Sugar 200 · flour 130 · rice 210 · milk 255. Example: 1 × 200 × (250/250) = 200 g of sugar.
Cup and products
Mass is cup count times the 250 ml base times V/250. One cup of sugar at 250 ml is 200 g. On US 240 ml it is 192 g.
- n
- Cup count from the form field. It may be a fraction, for example 0.5 or 1.5.
- base
- Grams per 250 ml from the table: sugar 200, flour 130, rice 210, milk 255.
- V
- One-cup volume from the header: 250 ml metric, 240 ml on US.
- m
- Result mass. For one cup of sugar at 250 ml the result is 200 g.
Examples
Example 2
- Cups: 2
- Product: flour
- Header: metric (250 ml)
260 g
2 × 130 g × (250/250) = 260 g of flour.
Example 3
- Cups: 1
- Product: rice
- Header: metric (250 ml)
210 g
1 × 210 g × (250/250) = 210 g of rice.
Related calculators
Frequently asked questions
How is cup mass calculated?
The calculator multiplies the cup count by the product constant for 250 ml, then by the ratio of the header cup volume to 250 ml. On metric, one cup of sugar is 200 g. On US 240 ml that same cup of sugar is 192 g.
Where do the product constants come from?
They are a closed kitchen table for 250 ml: sugar 200 g, flour 130 g, rice 210 g, milk 255 g. The same sugar and flour constants appear on the ml to grams page as 0.80 and 0.52 g/ml.
How does the metric/US header switch change the result?
On metric the cup is 250 ml. On US the volume is 240 ml, so mass is multiplied by 240/250. Mass formatting in the result also follows the header, usually grams or ounces.
Why can table flour be lighter than my scale?
130 g is loose flour in a 250 ml cup from our table. Packed, damp, or another brand weighs more. The calculator uses the table constant; it is a recipe guide, not a kitchen-scale reading.
Is the result a lab measurement?
No. These are kitchen constants for a recipe. Humidity, how you fill the cup, and the product brand change the real mass. Use a scale for precise weighing.
Are zero or negative cups allowed?
Zero cups give mass zero. A negative number is rejected. An empty field yields no result.
Why is there no cocoa or butter on the list?
The list is closed. We only have constants for sugar, flour, rice, and milk on 250 ml. We do not invent other products.
How is this different from ml to grams and from spoons?
Here you enter a cup count with the 250 ml table. On ml to grams you enter any milliliters or grams. A 15 ml tablespoon and a 5 ml teaspoon belong on the spoon page, without product density.
Does a comma in the cup count work?
Yes. A comma and a period are the same fraction. One and a half cups of sugar at 250 ml is 300 g, and one and a half of flour is 195 g.
What do the fields in the result panel show?
The primary result is mass. Beside it you see the cup count, product, one-cup volume from the header, the g-per-250 ml base, and total volume in milliliters.
How much does 1 cup of sugar and 1 cup of flour weigh at 250 ml?
Sugar: 200 g. Flour: 130 g. That is the table base per 250 ml: m = 1 × base × (250/250).
How much do 2 cups of flour and 1 cup of rice weigh?
Two cups of flour are 260 g (2 × 130). One cup of rice is 210 g on metric 250 ml.
How much does a cup of sugar weigh on US 240 ml?
200 × (240/250) = 192 g. The 0.96 factor scales the whole table, so milk 255 g becomes 244.8 g.
Which products are on the list?
Sugar 200 g, flour 130 g, rice 210 g, and milk 255 g per 250 ml. Other ingredients are not here — use ml to grams for any milliliters.
How is this different from ml to grams and tablespoons?
Here you count full cups from the table. On ml to grams you enter any ml and ρ. Tablespoons only use 15 ml and 5 ml with no product mass.
Is the result as exact as a kitchen scale?
No. These are kitchen table constants. Loose flour, packed sugar, or moisture change the real mass on a scale.
Knowledge sources
Cup mass is measuring-cup volume times product density. The 250 ml table is a kitchen constant, not a NIST certification.
Page updated November 3, 2026.