Small potatoes typically take about 10 to 20 minutes to boil, depending on their exact size. How to gauge doneness:

• Start with cold water, add a pinch of salt, and bring to a boil.
• Reduce to a simmer and cook until the potatoes are fork-tender.
• For small potatoes (roughly 1–2 inches in diameter), check at around 12–15 minutes.
• If they’re closer to 2 inches, they may need 15–20 minutes.
• To be sure, poke one with a fork: it should slide in easily with little resistance.

Tips for even cooking:

• Use a pot large enough to keep the potatoes in a single layer or with only a small amount of water covering them.
• Start in cold water for even cooking from the inside out.
• Do not overcook, or skins may split and interiors can become waterlogged.

If you share the exact size and quantity of your potatoes, the stove heat level, and whether you’re salting the water, can give you a more precise time.