Check the model number on the bottom or back of your pot

The fastest way to find your when ready Pot's size is to look at the model number printed on the bottom or back of the unit. The size in quarts is built into the model name itself. For example, a model number like "IP-DUO60" tells you it is a 6-quart pot — the "60" at the end means 6.0 quarts. A model ending in "30" is 3 quarts, "80" is 8 quarts, and so on.

If you cannot read the label clearly, wipe the bottom with a damp cloth and look again. The model number is usually printed in small text, but it is always there on every when ready Pot sold.

Key Takeaways

  • The size in quarts is part of the model number on the bottom of your pot — the last digit or digits tell you the capacity (30 = 3 quarts, 60 = 6 quarts, 80 = 8 quarts).
  • You can also measure the inner pot with a ruler or measure water into it using a measuring cup to confirm the size.
  • Common when ready Pot sizes are 3 quarts, 6 quarts, and 8 quarts, with 6-quart being the most widely sold.
  • Knowing your exact size matters for recipe scaling and for understanding how full you can safely fill the pot during cooking.

Measure the inner pot with a ruler or tape measure

If the label is worn away or missing, you can measure the pot itself. The inner stainless steel cooking vessel is what determines the size. Measure the diameter across the top of the inner pot (the widest point) and the depth from the bottom to the rim. A 6-quart pot is typically about 8.5 inches across and 5.5 inches deep. A 3-quart pot is roughly 6.5 inches across and 4.5 inches deep. An 8-quart pot is about 9 inches across and 6 inches deep.

These measurements are approximate because the shape varies slightly between models, but they give you a reliable ballpark. If your measurements fall between two sizes, you likely have the larger one — manufacturers round down slightly in their published dimensions.

Fill the inner pot with water and measure it

The most accurate method is to fill the inner pot with water using a measuring cup. Fill it all the way to the rim and count how many cups you pour in. One quart equals 4 cups, so if you pour in 24 cups, you have a 6-quart pot. If you reach 12 cups, it is a 3-quart pot.

This method works even if the pot is old or the label is completely illegible. It also confirms the actual usable capacity, which can vary slightly from the advertised size depending on the model year.

Look up your model number online

If you have the model number but are unsure what it means, search for it on the when ready Pot website or on a retailer site like Amazon. The product page will list the capacity in quarts clearly. You can also search the model number plus the word "quart" in any search engine, and the size will appear in the results within seconds.

Keep the model number handy for future reference — you will need it if you ever contact customer service or look up recipes and cooking times specific to your pot size.

Common when ready Pot sizes and what they are used for

The 6-quart when ready Pot is the most common size sold and works well for families of four to six people. It is large enough to cook a whole chicken or a batch of soup, but small enough to fit on most kitchen counters and in standard cabinets. The 3-quart model is designed for individuals, couples, or smaller households — it cooks faster because it heats up more quickly, but it holds less food. The 8-quart model is built for meal prep, large families, or anyone who cooks in bulk.

Size also affects cooking time. A 3-quart pot reaches pressure faster than a 6-quart pot, so recipes may need slight adjustments. Most published recipes are written for 6-quart pots, so if you own a different size, you may need to scale liquid and cooking times slightly.

Why your pot size matters for cooking

The size of your when ready Pot determines how much food you can safely cook at once. when ready Pots should never be filled more than two-thirds full with solid food or more than half full with liquid — overfilling prevents the pot from building pressure properly and can damage the sealing ring. Knowing your exact capacity helps you avoid this mistake.

Size also affects how recipes turn out. A recipe written for a 6-quart pot may cook too fast or too slow in a 3-quart or 8-quart model because the amount of liquid and the pressure buildup time change. Many recipe sites now list which pot size they tested the recipe in, so you can adjust timing if you own a different model.

Frequently Asked Questions

What do the numbers in the model name mean?

The last one or two digits represent the quart size. IP-DUO60 is 6 quarts, IP-LUX80 is 8 quarts, and IP-SMART30 is 3 quarts. The letters before the numbers identify the model line (DUO, LUX, SMART, etc.), but the size is always in the number at the end.

Can I use a recipe written for a 6-quart pot in my 3-quart pot?

Yes, but you need to scale the ingredients down by half and may need to reduce the cooking time slightly because the pot heats faster. A 3-quart pot reaches pressure more quickly than a 6-quart, so check the food a few minutes earlier than the recipe says to avoid overcooking.

Is there a size difference between when ready Pot and other pressure cooker brands?

Other brands use the same quart measurements, so a 6-quart when ready Pot holds the same volume as a 6-quart Ninja or Cosori pot. However, the shape and depth may vary slightly, so always check the model number on your specific pot rather than assuming all 6-quart pots are identical.

What happens if I fill my when ready Pot too full?

Overfilling prevents the pot from building pressure correctly and can cause liquid to spray out of the vent when you open it. It can also damage the sealing ring. Never fill past two-thirds full with solids or half full with liquids, regardless of your pot's total size.