Sous Vide Calculator
Achieve perfect cooking results with precise time and temperature.
What is a Sous Vide Calculator?
A sous vide calculator is an essential tool that helps you determine the exact time and temperature needed to cook various foods using the sous vide method. “Sous vide,” which means “under vacuum” in French, is a cooking technique that involves vacuum-sealing food in a bag and cooking it in a precisely regulated water bath. This method provides unparalleled control, resulting in perfectly cooked food every time. The calculator removes guesswork by factoring in the food type, its thickness, and your preferred level of doneness to provide scientifically-backed recommendations.
Whether you’re cooking a tender steak, a juicy chicken breast, or delicate fish, using a sous vide calculator ensures food safety and optimal texture. It is particularly crucial for extended cooks (e.g., tough cuts of meat) to ensure the food remains above the “danger zone” temperature of 130°F (54.5°C) where bacteria can thrive. For anyone serious about precision cooking, from home cooks to professional chefs, this tool is indispensable for achieving consistent, restaurant-quality results. You can find more information about the basics at our guide to sous vide cooking.
Sous Vide Formula and Explanation
The calculation for sous vide cooking is based on heat transfer principles, aiming to bring the core of the food to the target temperature and hold it there long enough for both cooking and, if necessary, pasteurization. The primary factors are temperature, thickness, and the type of food. Time is not linear; it generally increases with the square of the thickness.
This calculator uses a simplified model based on established data from sources like Douglas Baldwin and J. Kenji López-Alt. The logic is as follows:
- Temperature Selection: The target temperature is determined primarily by the desired doneness (e.g., 131°F for medium-rare steak).
- Time Calculation: The minimum cooking time is calculated based on the food’s thickness and type. Thicker cuts require significantly more time for the heat to penetrate to the center. Our model uses a base time and adds time proportionally to the thickness.
- Pasteurization: For poultry and pork, the calculator ensures the time is sufficient for pasteurization at the selected temperature, killing harmful bacteria like Salmonella and Listeria.
Core Variables Table
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Food Type | The type of protein or vegetable being cooked. | Categorical | Beef, Pork, Chicken, Fish, Egg, etc. |
| Thickness | The thickest measurement of the food. | in / mm | 0.5 – 4 inches (12 – 100 mm) |
| Doneness | The desired final internal state of the food. | Categorical | Rare, Medium-Rare, Medium, Well-Done |
| Temperature | The temperature of the water bath. | °F / °C | 125°F – 185°F (52°C – 85°C) |
| Time | The minimum duration the food should be in the water bath. | Hours, Minutes | 40 minutes – 72 hours |
Practical Examples
Example 1: Medium-Rare Ribeye Steak
You have a beautiful 1.5-inch thick ribeye steak and want it perfectly medium-rare.
- Inputs: Food Type: Beef, Thickness: 1.5 inches, Doneness: Medium-Rare.
- Calculator Output: Temperature: 131°F (55°C), Minimum Time: 1 hour 30 minutes.
- Interpretation: Set your sous vide machine to 131°F. Cook the steak for at least 90 minutes. For a more tender result, you can leave it in for up to 4 hours. After the bath, sear it in a hot pan for a perfect crust. For more steak tips, see our perfect sous vide steak guide.
Example 2: Juicy Chicken Breast
You want to cook a 1-inch thick chicken breast that is juicy and fully pasteurized.
- Inputs: Food Type: Chicken Breast, Thickness: 1 inch, Doneness: Juicy & Tender.
- Calculator Output: Temperature: 149°F (65°C), Minimum Time: 1 hour.
- Interpretation: Cooking at 149°F ensures the chicken is safe to eat while remaining incredibly moist. A one-hour cook time is sufficient for a 1-inch breast. This is a game-changer compared to traditional methods that often result in dry chicken. Check our guide to juicy chicken for more recipes.
How to Use This Sous Vide Calculator
Using this calculator is a simple, step-by-step process to ensure cooking success.
- Select Food Type: Choose the type of food you are cooking from the first dropdown. This adjusts the available doneness levels and base calculations.
- Enter Thickness: Measure the thickest part of your food and enter it into the ‘Thickness’ field. Be as accurate as possible.
- Choose Units: Select whether your thickness measurement is in inches or millimeters. The calculator will handle the conversion automatically.
- Select Doneness: Pick your desired doneness. The options will change based on the food type (e.g., ‘Medium-Rare’ for steak, ‘Juicy & Tender’ for chicken).
- Set Temperature Unit: Choose between Fahrenheit (°F) and Celsius (°C) for the output.
- Review Results: The calculator will instantly display the recommended water bath temperature and the minimum cooking time required.
Key Factors That Affect Sous Vide Cooking
While this sous vide calculator simplifies the process, several factors can influence the outcome. Understanding them will make you a better cook.
- Accuracy of Thickness: Time is highly dependent on thickness. An incorrect measurement is the most common source of error. Always measure the thickest point.
- Starting Temperature (Fresh vs. Frozen): Cooking from frozen requires extra time. As a rule of thumb, add about 50% to the calculated minimum time if your food is frozen.
- Water Circulation: Proper water circulation is vital for maintaining a consistent temperature throughout the bath. Poor circulation can create cold spots and lead to uneven cooking. This is why immersion circulators are preferred over static water ovens.
- Bag Seal and Submersion: The food must be fully submerged and the bag should have as much air removed as possible. Air pockets can insulate the food, preventing it from cooking properly.
- Type of Tissue (Tough vs. Tender Cuts): Tender cuts like tenderloin only need to reach the target temperature. Tough cuts like brisket or short ribs require extended time (24-72 hours) at temperature to break down tough connective tissue (collagen) into gelatin. For these cuts, see our guide to long cook time meats.
- Bone-In vs. Boneless: Bones can slow heat transfer slightly, but the effect is generally minimal. For very thick, bone-in cuts, adding a small amount of extra time is a safe bet.
Frequently Asked Questions (FAQ)
It provides a very reliable estimate based on established scientific principles and cooking data. However, it’s a guide; results can vary slightly based on the specific shape and composition of your food.
It’s difficult, but possible. While temperature won’t go above the water bath’s setting, leaving food in for too long (many hours past the minimum) can result in a mushy texture as fibers continue to break down.
For most meats, yes. Searing in a hot pan or on a grill after the sous vide bath creates a flavorful crust through the Maillard reaction, which doesn’t happen in the water bath.
Yes, as long as you use food-grade, heat-stable bags designed for sous vide, such as those made from polyethylene or polypropylene. Avoid using regular PVC or plastic wrap.
Floating is caused by air in the bag and will lead to undercooked food. You can weigh the bag down with a heavy spoon, a magnet, or use a sous vide rack to keep it submerged.
The calculator converts all thickness inputs to millimeters internally for its calculations, so the physics remains consistent regardless of whether you enter inches or mm. The final temperature is displayed in your chosen unit (°F or °C).
Yes, though this calculator is optimized for proteins. Vegetables often require higher temperatures (around 185°F / 85°C) to break down their fibrous cell walls (pectin). For more details, look at our sous vide vegetables 101 page.
The danger zone is the temperature range between 40°F (4°C) and 130°F (54.5°C), where bacteria multiply rapidly. For long sous vide cooks (over 4 hours), it’s critical to set the temperature above 130°F to ensure food safety.