The boiling time for potatoes depends mainly on their size and whether they are whole or cut into pieces:

• Small or cubed potatoes typically take about 10 to 15 minutes to boil until tender.
• Larger whole potatoes usually require 20 to 25 minutes.
• Baby potatoes (around 1 inch) take about 12 to 15 minutes.
• Medium-sized potatoes (around 3 inches) take about 20 to 25 minutes.
• Extra-large potatoes (around 6 inches) may take 30 minutes or more.

To boil potatoes properly:

• Start by placing potatoes in a pot and cover them with cold water by about an inch or two.
• Add salt to the water for flavor.
• Bring the water to a boil, then reduce heat to a gentle simmer.
• Cook until the potatoes are fork-tender and the skin starts to split (if unpeeled).
• Drain immediately to avoid overcooking.

For peeled and cubed potatoes, cooking time is usually shorter, around 10 to 15 minutes, depending on the cube size. For whole potatoes, cooking times are longer as noted above. In summary, expect about 10-15 minutes for small or cubed potatoes and 20-25 minutes for larger whole potatoes, adjusting slightly based on exact size