How Much Mashed Potatoes Per Person
Find out exactly how many pounds of potatoes you need to make mashed potatoes for any number of people.
How Much Mashed Potatoes Per Person Do You Actually Need?
The standard answer to how much mashed potatoes per person is about ⅓ to ½ pound of raw, unpeeled potatoes per person when it’s one of several side dishes on the table. If mashed potatoes are the main starch or centerpiece of the meal, plan closer to ¾ pound per person. These amounts account for the weight lost during peeling and the water that cooks off, since raw potato weight doesn’t translate directly into finished mashed potato volume.
As a rule of thumb, 1 pound of raw potatoes yields roughly 2 cups of mashed potatoes once peeled, boiled, and mashed with butter and milk. This calculator adjusts the exact amount based on whether potatoes are the star of the meal or a supporting side, and how many leftovers you want.
Mashed Potato Chart by Guest Count
Here’s how much mashed potatoes per person translates into total raw potato weight for common group sizes, assuming potatoes are one side dish among several with a moderate amount of leftovers:
| Number of Guests | Raw Potatoes Needed | Approx. Mashed Yield |
|---|---|---|
| 4–6 people | 2–3 lbs | 4–6 cups |
| 8–10 people | 4–5 lbs | 8–10 cups |
| 12–14 people | 6–7 lbs | 12–14 cups |
| 16–18 people | 8–9 lbs | 16–18 cups |
| 20+ people | 10+ lbs | 20+ cups |
For large holiday gatherings, it’s common to slightly overestimate on mashed potatoes compared to other sides — leftover mashed potatoes reheat well and get used in dishes like shepherd’s pie or potato pancakes, so err toward the higher end of the range if you’re unsure.
Why Raw Weight Doesn’t Equal Finished Volume
A pound of raw, unpeeled potatoes loses roughly 10-15% of its weight to peeling, and additional volume is lost to water evaporating during boiling. What’s left is then mixed with butter and milk, which adds volume back. The net result is that 1 pound of raw potatoes reliably yields about 2 cups of finished mashed potatoes — a ratio that holds fairly consistently across russet, Yukon gold, and red potatoes, the three most common mashing varieties.
Frequently Asked Questions
Plan on ⅓ to ½ pound of raw potatoes per person if mashed potatoes are one of several side dishes, or about ¾ pound per person if they’re the main starch of the meal. This yields roughly ⅔ to 1 cup of finished mashed potatoes per person.
One pound of raw, peeled potatoes yields approximately 2 cups of mashed potatoes once boiled and mashed with butter and milk. This ratio holds fairly consistently across russet, Yukon gold, and red potato varieties.
Yes — for generous leftovers, plan closer to ¾ pound of raw potatoes per person even as a side dish. Leftover mashed potatoes reheat well and can be repurposed into dishes like shepherd’s pie or potato pancakes, so it’s rarely wasted.
Not significantly. Russet, Yukon gold, and red potatoes all yield roughly similar amounts of mashed potatoes per pound of raw weight. Russets tend to produce a fluffier, drier mash, while Yukon golds are naturally creamier — but the quantity ratios stay about the same across all three.
Serving size guidance provided by USDA MyPlate.