How Much Is 1.29 Cups of Mayonnaise in Ounces?
1.29 cups of mayonnaise equals 10.01 oz. Mayonnaise has a density of 220g per cup (220g per cup), which means it's relatively heavy compared to other common cooking ingredients. For comparison, 1.29 cups of all-purpose flour would be 5.70 oz.
Formula and Step-by-Step
- Start with 1.29 cups of mayonnaise
- 1 cup of mayonnaise = 220g
- 1.29 × 220 = 283.8g
- Convert grams to ounces: 283.8 ÷ 28.3495 = 10.01 oz
The same formula works for any amount. Multiply (or divide) by the density, then convert units as needed.
Measuring Tip
For the most accurate results, weigh mayonnaise on a kitchen scale. Thick spreads can vary by 5-10% depending on how firmly they are packed.
Mayonnaise at Different Amounts
How mayonnaise scales across common cups measurements. Your amount (1.29 cups) is highlighted.
For reference, 1.29 cups of mayonnaise (283.8g) is close in weight to a can of soup (305g).
Other Amounts of Mayonnaise
| Cups | US Ounces | Metric Cup | Imperial Cup |
|---|---|---|---|
| 0.25 cups | 1.94 oz | 2.05 oz | 2.33 oz |
| 0.33 cups | 2.56 oz | 2.71 oz | 3.08 oz |
| 0.5 cups | 3.88 oz | 4.10 oz | 4.66 oz |
| 0.75 cups | 5.82 oz | 6.15 oz | 6.99 oz |
| 1 cup | 7.76 oz | 8.20 oz | 9.32 oz |
| 1.29 cups | 10.01 oz | 10.58 oz | 12.02 oz |
| 1.5 cups | 11.64 oz | 12.30 oz | 13.98 oz |
| 2 cups | 15.52 oz | 16.40 oz | 18.64 oz |
| 3 cups | 23.28 oz | 24.60 oz | 27.96 oz |
| 4 cups | 31.04 oz | 32.80 oz | 37.28 oz |
| 5 cups | 38.80 oz | 41.00 oz | 46.60 oz |
Understanding the Units
What is a Cup?
In US cooking, a cup measures volume, not weight. One standard US cup holds 236.588 ml of liquid. Because different ingredients have different densities, a cup of one ingredient can weigh very differently from a cup of another.
What is an Ounce?
An ounce (oz) is a US customary unit of weight equal to 28.3495 grams or 1/16 of a pound. In cooking, "ounces" refers to weight (avoirdupois ounces), not fluid ounces which measure volume.