How many grams is a cup of sweet potatoes?

A cup of sweet potatoes is about 139 grams of sweet potato. The density of chopped sweet potato is fixed, so the ratio holds at any amount: double the cups and you double the grams. Use the converter above for any quantity, or the chart below for the most common amounts.

How many cups of sweet potatoes is 139 grams?

139 grams of sweet potatoes is about 1 cup. The conversion works the same in reverse, so you can switch between cups and grams without changing the result. This helps when a recipe lists one unit but you would rather measure the other. Use the converter above for any amount.

Convert Sweet Potato from Cups (chopped) to Grams

Sweet Potato converter

Use the tool below to convert sweet potato from Cups (chopped) to Grams.

A small sweet potato is around 40% of the weight of a large one, so 'three sweet potatoes' in a tray bake or pie can swing the yield. Pick the right size below to keep mash, fries, and casseroles on target.

How many grams is 1 cup of sweet potato?

One cup of chopped sweet potato weighs about 139 g. Half a cup is about 69.5 g and two cups about 278 g. The weight is the same at any item size, since it measures chopped flesh, so use the converter above for any cup amount.

Out of sweet potato? See sweet potato substitutes →

Using regular potato instead? The potato converter handles whole-item counts and cubed cups across small, medium, and large sizes. See what a cup of potatoes is in grams.

Adding carrot to the roast? The carrot converter works out whole-item counts and chopped cups across small, medium, and large sizes. See what a cup of carrots is in grams.

No measuring cups? The tool below gets you close, and a measuring cup set keeps every batch the same.

Scoop it right, get measuring cups

Enter an amount, pick your units, and set the size for counting whole sweet potatoes.

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Sweet potato sizeSize applies to whole sweet potatoes (small / medium / large).

Result

139 g

Common Sweet Potato conversions

Quick reference for sweet potato at medium size. Switch the size in the converter above for small or large.

Cups (chopped)	Grams
0.25 cups	34.75 g
0.5 cups	69.5 g
0.75 cups	104.25 g
1 cup	139 g
1.5 cups	208.5 g
2 cups	278 g
3 cups	417 g

Sweet Potato conversion chart

The chart below shows how whole sweet potatoes (medium size) convert to cups, grams and ounces.

cups	g	sweet potatoes	cups (US)	oz	lb	kg
0.25 cups	34.75 g	0.17 sweet potatoes	0.26 cups (US)	1.23 oz	0.08 lb	0.03 kg
0.5 cups	69.5 g	0.35 sweet potatoes	0.52 cups (US)	2.45 oz	0.15 lb	0.07 kg
1 cup	139 g	0.7 sweet potatoes	1.05 cups (US)	4.9 oz	0.31 lb	0.14 kg
1.5 cups	208.5 g	1.04 sweet potatoes	1.57 cups (US)	7.35 oz	0.46 lb	0.21 kg
2 cups	278 g	1.39 sweet potatoes	2.09 cups (US)	9.81 oz	0.61 lb	0.28 kg

Sweet Potato varieties and best uses

The conversions above are the same whatever variety you use; the difference is what each is good for. Here is how the common sweet potato varieties compare.

Variety	Best for
Beauregard	Everyday baking, mash, and roasting: deep orange flesh, sweet and reliably moist; the standard US supermarket sweet potato.
Garnet	Mash, pies, and casseroles: red-purple skin and deep orange flesh, very moist and sweet.
Jewel	Roasting and baking whole: copper skin and orange flesh, mild and sweet with a moist texture.
Japanese (Murasaki)	Roasted wedges and savoury sides: purple skin and pale flesh, drier and less sweet with a chestnut flavour.
Stokes Purple	Showpiece purées and colourful plates: purple skin and deep purple flesh, slightly drier and earthy.

Which should I pick?

For everyday baking, mashing, and roasting, Beauregard is the supermarket default: deep orange flesh, sweet and reliably moist. No Beauregard? Garnet or Jewel are interchangeable orange-flesh substitutes, equally sweet. For drier, savoury dishes and roasted wedges, Japanese (purple skin, pale flesh) holds its shape with a chestnut sweetness. Stokes purple-flesh sweet potatoes are the pick for colourful purées and showpiece plates.

Frequently Asked Questions

How many grams is a cup of sweet potatoes?: A cup of sweet potatoes is about 139 grams of sweet potato. The density of chopped sweet potato is fixed, so the ratio holds at any amount: double the cups and you double the grams. Use the converter above for any quantity, or the chart below for the most common amounts. Open the sweet potato converter
How many cups of sweet potatoes is 139 grams?: 139 grams of sweet potatoes is about 1 cup. The conversion works the same in reverse, so you can switch between cups and grams without changing the result. This helps when a recipe lists one unit but you would rather measure the other. Use the converter above for any amount.
Which sweet potato variety should I use?: For everyday baking, mashing, and roasting, Beauregard is the supermarket default: deep orange flesh, sweet and reliably moist. No Beauregard? Garnet or Jewel are interchangeable orange-flesh substitutes, equally sweet. For drier, savoury dishes and roasted wedges, Japanese (purple skin, pale flesh) holds its shape with a chestnut sweetness. Stokes purple-flesh sweet potatoes are the pick for colourful purées and showpiece plates.

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