Walnuts (halves): Grams to Cups
1 cup of walnuts (halves) = 128 grams
One US cup of walnuts (halves) weighs 128 grams. One 250 ml metric cup — the one used in the UK, Australia, New Zealand and Canada — holds 135 grams. To convert any weight, divide the grams by the figure for your cup.
Whole walnut halves weigh about 128 g per cup (King Arthur Baking: 64 g per ½ cup). Halves leave big gaps in the cup, so they weigh less than chopped walnuts would if packed — weigh them before chopping.
Where the 128 g figure comes from
- King Arthur Baking ingredient weight chart: Walnuts (whole), 1/2 cup = 64 g (about 128 g per cup) (chart)
This site uses 128 g per US cup of walnuts (halves), spooned and levelled. References checked September 2026.
How many cups is X grams of walnuts (halves)?
| Grams | US cups | Metric cups | Tablespoons | Ounces |
|---|---|---|---|---|
| 25 g walnuts (halves) | ¼ | ⅛ | 3.13 | 0.88 |
| 50 g walnuts (halves) | ⅜ | ⅜ | 6.25 | 1.76 |
| 75 g walnuts (halves) | ⅝ | ½ | 9.38 | 2.65 |
| 100 g walnuts (halves) | ¾ | ¾ | 12.5 | 3.53 |
| 110 g walnuts (halves) | ⅞ | 0.81 | 13.75 | 3.88 |
| 120 g walnuts (halves) | 0.94 | ⅞ | 15 | 4.23 |
| 125 g walnuts (halves) | 1 | ⅞ | 15.63 | 4.41 |
| 130 g walnuts (halves) | 1 | 1 | 16.25 | 4.59 |
| 140 g walnuts (halves) | 1⅛ | 1 | 17.5 | 4.94 |
| 150 g walnuts (halves) | 1⅛ | 1⅛ | 18.75 | 5.29 |
| 170 g walnuts (halves) | 1⅓ | 1¼ | 21.25 | 6.00 |
| 175 g walnuts (halves) | 1⅜ | 1⅓ | 21.88 | 6.17 |
| 200 g walnuts (halves) | 1.56 | 1½ | 25 | 7.05 |
| 225 g walnuts (halves) | 1¾ | 1⅔ | 28.13 | 7.94 |
| 240 g walnuts (halves) | 1⅞ | 1¾ | 30 | 8.47 |
| 250 g walnuts (halves) | 1.95 | 1⅞ | 31.25 | 8.82 |
| 275 g walnuts (halves) | 2⅛ | 2 | 34.38 | 9.70 |
| 300 g walnuts (halves) | 2⅓ | 2¼ | 37.5 | 10.58 |
| 350 g walnuts (halves) | 2¾ | 2⅝ | 43.75 | 12.35 |
| 400 g walnuts (halves) | 3⅛ | 2.96 | 50 | 14.11 |
| 450 g walnuts (halves) | 3½ | 3⅓ | 56.25 | 15.87 |
| 500 g walnuts (halves) | 3⅞ | 3⅔ | 62.5 | 17.64 |
How to measure walnuts (halves) accurately
The 128 g figure assumes the spooned-and-levelled method: spoon the walnuts (halves) into a dry measuring cup and sweep the top flat with a straight edge. Scooping the cup through the bag compacts it and gives a heavier cup.
- 1 US cup of walnuts (halves) = 128 g
- 1 metric cup (250 ml) of walnuts (halves) = 135 g
- ¾ cup = 96 g
- ½ cup = 64 g
- ⅓ cup = 43 g
- ¼ cup = 32 g
- 1 tablespoon = 8.0 g
Frequently asked questions
How many cups is 100 grams of walnuts (halves)?
100 grams of walnuts (halves) is about ¾ US cups, based on 128 g per cup, or ¾ metric cups.
How many grams in a cup of walnuts (halves)?
One US cup of walnuts (halves) weighs 128 grams. A 250 ml metric cup holds 135 grams.
How many cups is 250 grams of walnuts (halves)?
250 grams of walnuts (halves) is about 1.95 US cups, or 1⅞ metric cups.
Does a UK cup of walnuts (halves) weigh the same as a US cup?
No. A UK, Australian or Canadian metric cup is 250 ml against the US 236.6 ml, so it holds about 5.7% more — 135 g of walnuts (halves) rather than 128 g.
How many tablespoons is 100 grams of walnuts (halves)?
100 grams of walnuts (halves) is about 12.5 tablespoons.
More nuts and seeds conversions: Walnuts (chopped) grams to cups.