Getting the timing right is the hardest part of cooking dried beans well. A minute too little leaves it underdone and unpleasant to eat, while a minute too much turns it dry, rubbery or mushy. Cookbooks often give one single time, but that time assumes one size, one method and one starting point, which rarely matches your kitchen. This free calculator fixes that gap. It works out the right cooking time for your exact choices, so you can plan the rest of the meal around a reliable finish time instead of guessing and checking every two minutes.
The right time depends on several things at once. Size matters most, because heat takes longer to reach the centre of a large piece. The cooking method matters too, since boiling, steaming, roasting and pressure cooking all transfer heat at different speeds. Starting temperature, cut size and how crowded the pan is also change the result. That is why this tool asks about Bean type: Black beans, Kidney beans, Chickpeas, Cannellini beans, Pinto beans, Navy beans, Butter beans, Adzuki beans; Soaked: Soaked overnight, Unsoaked; Method: Pot on stove, Pressure cooker, Slow cooker. Answer each question honestly, and the time it gives will fit your pan, your oven and your ingredients far better than a single number from a book.
Using the calculator takes less than a minute. First, enter the servings. Next, choose each option from the menus, picking the choice that matches what you actually have in the kitchen. Then press the calculate button. The tool shows the cooking time in minutes, plus the amounts you need for the recipe. You can also start the built-in timer, which counts down from the suggested time, so you do not need a separate timer app or a clock on the wall while you cook.
For example, soaked black beans in a pot need 45 minutes, while the same beans unsoaked in a pressure cooker need 34 minutes. The same maths works for any amount, because the tool scales the time from the base figures for each choice. If you change one option, the result updates at once, so you can compare methods before you start cooking and pick the one that fits your schedule best.
Soaked beans cook much faster than unsoaked beans, and a pressure cooker cuts the time further still. Kidney beans need a vigorous boil for ten minutes before slow cooking, because slow cookers alone do not get hot enough to make them safe. Soak dried beans overnight when you can, because soaked beans cook faster, more evenly, and are easier to digest. Discard the soaking water and cook in fresh water. These are planning figures based on typical home cooking, not laboratory measurements, so use your eyes and a thermometer when the food is expensive or when food safety matters. If two guides disagree, trust the thermometer reading over any timer.
The most common mistake is starting the clock at the wrong moment. For boiled and steamed food, start when the water returns to a boil or a steady steam, not when you first turn on the heat. For roasted food, start when the oven has fully preheated, because an oven that is still warming up cooks far more slowly. Another common mistake is lifting the lid again and again to check, which lets out heat and steam and stretches the cooking time. Trust the timer, then check once near the end.
Plan the rest of the meal backwards from the finish time. Side dishes, sauces and salads should be ready at the same moment, not ten minutes later, so work out when to start each one from the time this tool gives you. Leftovers of most cooked dishes keep for two to three days in a sealed container in the fridge, and many taste just as good reheated gently the next day. Never leave cooked food sitting at room temperature for more than two hours.
This calculator is free, needs no account and works in your browser on a phone or a computer. Bookmark the page before your next cooking day, enter your choices, and cook with a clear finish time in mind. Good timing is a quiet skill, but it is the difference between a meal that is merely edible and a meal people remember. With the right time for dried beans, that difference is yours to enjoy.

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