How Long to Boil Potatoes
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Cooking times with conditions (cold water or boiling water, portion size, pot covered or not) and a stopwatch that counts down in the browser.
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Potatoesare boiled15–20 min- this is the "Cut into quarters, under cold water" variant. The entire spread for this item, from the shortest to the longest method, is within 8-35 minutes, because different degrees of cooking and different processing methods mean really different times. The times below refer to the serving size: 1 kg of medium potatoes (≈100 g each). The stopwatch on this page counts down in your browser, so you can turn it on and put your phone next to the pot.
We provide ranges, not one number. Portion size, variety, equipment, and altitude shift the result enough that "potatoes are exactly that many minutes" would be a fictitious precision. Readiness indicators are more reliable than a watch - we describe them below.
Cooking times: potatoes, method by method
| Method / degree of cooking | Time | Conditions for which this time applies | Effect |
|---|---|---|---|
| Cut into quarters, from cold water | 15-20 min | poured with cold salted water 2 cm above the potatoes, covered pot until boiling, time counted from boiling | crushed into a lump-free puree |
| Whole, medium, in the shell | 25–35 min | from cold water, time counted from boil, pot ajar | soft through, skin cracks |
| New potatoes, whole | 15–25 min | thrown into boiling salted water, pot ajar | soft, compact, not falling apart |
| Cubed 2 cm (for salad) | 8–12 min | thrown into boiling water, uncovered pot, removed with a slotted spoon | soft, but holding the shape of a cube |
| Steamed, quarters | 20–25 min | insert over boiling water, pot covered | less watery than boiled in water |
The "conditions" column is not decoration: the same time with a different start gives a different result. The table clearly states whether the potatoes are placed in cold or boiling water, whether the pot is covered and how much water should be above the product. Time without these conditions means nothing.
Cold water or boiling water - and when to add salt
The start has two meanings. Putting it incoldwater equalizes the temperature throughout the volume and works well where the center is far from the surface - otherwise the edge will fall apart before the center softens. Throwingintoboiling water gives a shorter and more repeatable time, because the countdown starts from a known temperature. For potatoes, the correct start is given in the "conditions" column for each variant separately, because different methods start differently.
Salt raises the boiling point almost insignificantly (a few hundredths of a degree per tablespoon per liter), so it does not shorten the cooking time. It is important for taste and texture: salted legumes harden at the beginning, so salt is added at the end.
How to tell when potatoes are ready
- The knife or stick goes into the largest piece without resistance and slides out under its own weight.
- The edges of the quarters are starting to "fray" - this is the time to drain if you want firm potatoes.
- After straining and evaporating, the surface turns dull in a few seconds.
These indicators override the watch. The watch tells you when to start checking; the fork, knife and appearance tell you when to remove from the heat.
Common mistakes when cooking potatoes
- Throwing whole potatoes into boiling water: the outer layer falls apart before the center softens. That's why potatoes start with cold water.
- Pieces of different sizes in one pot.
- Holding in water after cooking - they take on water and the puree comes out sticky.
What advances time: size, quantity, equipment, height
- The size of the piece (the strongest factor) and whether the potato is in the shell.
- Type of potato: salad potatoes (type A) stay compact longer than flour potatoes (type C).
- Season - potatoes stored since autumn take longer to cook than young ones.
The amount in the pot depends on temperature, not mass: pouring a large portion into a small amount of boiling water lowers the temperature and the water must return to a boil before the time in the table takes effect. Therefore, when making a double portion, it is better to use a larger pot and more water than to add minutes blindly. Start the countdown from the moment you return to the boil, not from the moment you put the potatoes into the water.
Water boils at 100 °C only at standard sea level pressure. The boiling point drops by about 1 °C for every ~300 m of altitude, so in Zakopane (≈850 m) water boils at ≈97 °C, and on Kasprowy Wierch (≈1987 m) at ≈93 °C. Lower temperature means longer cooking time: in the mountains, add about 5-10% of the time for every 500 m, and even more for legumes.
Where do these tenses come from
The tenses for this item are based on: Established culinary practice (cookbooks and manufacturers' instructions). Where food safety is involved, we refer to and link to the tables of food safety institutions. If there is a different time on the packaging of your product, the packaging takes precedence - the manufacturer knows his raw material, its grinding and pre-processing, and we describe the general scope. The tool above allows you to enter your own time and count it down with a stopwatch.