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½ US Cup Creamy Peanut Butter = 129g

½ US Cup of creamy peanut butter weighs 129 grams (4.55 ounces or 0.28 pounds; 118.3 mL or 8 tablespoons in volume) when measured packed firmly into cup at a verified bulk density of 258g per 236.6 mL US Customary cup.

Imperial weight: 4.55 oz (0.28 lb) • Volume: 118.3 mL (8 tbsp)

Batch
Measuring density
Converted Measure
0.5 US cup Creamy Peanut Butter (packed firmly into cup) =
129 g
Physical scoop breakdown0.50 cups
1/2 cup
Edit either side to reversePeanut Butter chart →
Grams
129 g
Ounces
4.55 oz
US Cups
½ cup
Metric (250mL)
0.47 c
Tablespoons
8 tbsp
Milliliters
118.3 mL

Kitchen note: Test-kitchen baseline uses packed firmly into cup (258g/cup). Switching to chunky peanut butter (250g/cup) changes each cup by 8g—use the packing toggle on the scale bench to match your recipe.

Batch Scaling Around ½ US Cup Creamy Peanut Butter

Batch scaling conversion table around ½ US Cup of Creamy Peanut Butter (0.5× to 3× recipe batches in grams, ounces, US cups, and milliliters)
Batch Scale Weight (g / oz) US Cups & Spoons Metric (mL)
Half Batch (0.5×) 64.5g (2.28 oz) ¼ cup 59.1 mL
Standard (1×) 129g (4.55 oz) ½ cup 118.3 mL
1.5× Batch 193.5g (6.83 oz) ¾ cup 177.4 mL
Double Batch (2×) 258g (9.1 oz) 1 cup 236.6 mL
Triple Batch (3×) 387g (13.65 oz) 1 ½ cups 354.9 mL

Measuring ½ US Cup of Creamy Peanut Butter in the Kitchen

Measured packed firmly into cup at a verified bulk density of 258g per US cup, ½ US cup of creamy peanut butter weighs 129 grams (4.55 ounces). Measured using the chunky peanut butter method (250g/cup), that same ½ cup holds 125g — a 4g difference in your mixing bowl.

Dense and sticky; pack firmly into a dry measuring cup with a rubber spatula to purge air pockets, or coat the cup in non-stick oil spray.

Source note: USDA FoodData Central #172470 & Jif / Skippy technical standard (258g/cup)

Frequently Asked Questions

How many grams is ½ cup of creamy peanut butter? ▾

½ US Cup of creamy peanut butter measured packed firmly into cup weighs 129 grams (4.55 ounces).

Why is chunky peanut butter slightly lighter per cup than creamy? ▾

Rough peanut pieces cannot pack together as seamlessly as homogeneous puree, leaving small gaps that reduce cup weight by ~8g.

Can natural peanut butter be swapped 1:1 for commercial creamy peanut butter? ▾

Yes by weight, but stir thoroughly to integrate separated oil, and consider cookies may spread slightly more due to lack of hydrogenated palm oil.