Potato Portions Calculator

Allow about 200g of raw peeled potato per person for roast potatoes. With peeling waste, buy approximately 230g of unpeeled potatoes per person. This gives a generous portion of 4-5 roast potato pieces per serving.

For mash, allow 200g of peeled potato per person (about 230g unpeeled). This is roughly one large or 1.5 medium potatoes per person. The weight reduces slightly during cooking but butter and milk are added back.

A medium UK potato weighs approximately 175g. A large baking potato weighs 250-300g. Small new potatoes weigh about 40-60g each. These weights are for unpeeled potatoes.

Yes, peeling removes approximately 15% of the potato weight. This calculator automatically adds 15% to the raw weight for cooking methods that require peeling (mash, roast, chips, boiled). Baked potatoes are cooked in their skins, so no waste is added.

For roasting and chips, use floury varieties like Maris Piper or King Edward. For mash, use floury types like Maris Piper or King Edward; Desiree, an all-rounder, also mashes well. For boiling and salads, use waxy varieties like Charlotte or Jersey Royals. For baking, use large floury potatoes like Maris Piper.