40 %
Potassium contributes to normal functioning of the nervous system and to normal muscle function.
How many calories are in roasted new potatoes?
275kcal
in a 175 g portion
157 kcal per 100 g.
Source: UK CoFID 2021, record 13-619, 10 analysed samples. Checked 5 October 2026.
11.6 gFat
4.4 gProtein
5.3 gFibre
40 %Daily potassium
What’s in a 175 g portion
More than half of a portion is water. The rest is 40.9 g carbohydrate and 11.6 g fat.
- 11.6 gFat
- 4.4 gProtein
- 40.9 gCarbohydrate
- 5.3 gFibre
- 110 gWater
- 2.8 gMinerals and the rest
About average for potatoes
New potatoes are 157 kcal per 100 g. The 37 potatoes in this database average 179.
New potatoes157
Potatoes average179
Low in sugar and salt
Low sugars and low salt by UK labelling rules, per 100 g.
Sugars, per portion1.8 g
Salt, per portion0.44 g
Vitamins and minerals in new potatoes
Nothing reaches the “high in” level, but three of the 19 count as a source, led by potassium.
Only a trace
- Iodine
None recorded
- Vitamin A
- Vitamin D
- Vitamin B12
Show all 19 with amounts
Potassium805 mg, 40 %
Copper0.39 mg, 39 %
Chloride280 mg, 35 %
Thiamin (vitamin B1)0.28 mg, 25 %
Phosphorus158 mg, 23 %
Folate0.0437 mg, 22 %
Manganese0.35 mg, 18 %
Vitamin E2 mg, 17 %
Niacin (vitamin B3)1.9 mg, 12 %
Vitamin C8.8 mg, 11 %
Magnesium38.5 mg, 10 %
Iron1.1 mg, 7.5 %
Selenium0.0035 mg, 6.4 %
Zinc0.53 mg, 5.3 %
Calcium22.8 mg, 2.8 %
Riboflavin (vitamin B2)0.04 mg, 2.5 %
Vitamin Anone recorded
Vitamin Dnone recorded
Vitamin B12none recorded
Badges use the UK legal thresholds per 100 g: 15 % of the reference intake for “source of”, 30 % for “high in”. A trace is shown as “trace” and never counts.
What new potatoes don’t give you. And where to find it.
No recorded vitamin D, and only 3 % of the zinc reference intake and 3.6 % of the selenium reference intake per 100 g.
Vitamin D
0mgin new potatoes
Find it inBloater, grilled500 % per 100 g
Zinc
3%in new potatoes, per 100 g
Find it inOysters, raw592 % per 100 g
Selenium
3.6%in new potatoes, per 100 g
Find it inKidney, pig, fried491 % per 100 g
100 mgVitamin C, 125 %
0.075 mgSelenium, 136 %
0.00125 mgVitamin D, 25 %
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New potatoes against other potatoes
Per 100 g, potato powder (instant, raw) have the most potassium in this comparison, followed by potato chips (oven ready, with batter, baked).
1430mg
602mg
516mg
460mg
360mg
360mg
Potato powder, instant, raw+970 mg
Potatoes, new, frozen, `roast' in corn oilthis page
Potatoes, old, baked−100 mg
Potato croquettes, fried−100 mg
All values per 100 g, from the same dataset. Differences are against new potatoes.
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Questions about new potatoes
The questions people ask about new potatoes, answered from the dataset.
How many calories are in a portion of new potatoes?
A typical portion (175 g, a medium portion) gives 275 kcal. Per 100 g the figure is 157 kcal.
Is new potatoes a source of potassium?
It is a source of potassium: 460 mg per 100 g, 23 % of the NRV, which passes the 15 % threshold for “source of” but not the 30 % needed for “high in”.
Which vitamins and minerals do new potatoes have most of?
By share of the daily reference intake: potassium (460 mg, 23 %), copper (0.22 mg, 22 %) and chloride (160 mg, 20 %) per 100 g.
Are new potatoes high in fibre?
It is a source of fibre (3 g per 100 g, above the 3 g line) but not high in fibre, which needs 6 g.
How these numbers were made
Every figure comes from the UK Composition of Foods Integrated Dataset (CoFID), 2021 edition, record 13-619, Potatoes, new, frozen, `roast' in corn oil, 10 analysed samples, published by Public Health England under the Open Government Licence v3.0. Main data references: Vegetables, Herbs and Spices Supplement, 1991; and updated from 13-495. Values are per 100 g of the edible part; a portion is 175 g, a medium portion, the usual UK portion for potatoes. Reference intakes follow Regulation (EU) 1169/2011 Annex XIII as retained in GB law; “source of”, “high in” and “low” follow Regulation (EC) 1924/2006, assessed per 100 g. Function lines are the authorised wording from the GB register of nutrition and health claims, credited to the nutrient. Energy is rounded to the whole kcal and kJ; other amounts to one decimal, or two below 1. A trace is shown as “trace” and never gets a figure or a badge; a nutrient never analysed is left off the page. We start from the dataset’s 2,887 records and keep 2,322: records weighed with bone, shell or skin, alcoholic drinks, infant foods, brand-named products, records with fewer than eight measured vitamins and minerals and near-identical variants are left out. Group context uses the 37 potatoes kept from the dataset; a rank counts only the foods with a measured figure for that nutrient. Food images are illustrations from Ingredient Atlas, released under CC0; they show the food, not the measured sample, and where no illustration of the exact food exists the nearest one is shown (here: Potato). Checked 5 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
More potatoes
From the same group, with calories per 100 g, and the foods with the most potassium.
