Learn How to Use a Meat Thermometer Properly

Understanding Meat Thermometer Types and How They Work

A meat thermometer is a tool that measures the internal temperature of cooked meat. Different types exist, and each works in its own way. Understanding how they function helps you choose the right one for your cooking style.

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Dial thermometers have a metal probe connected to a circular face with temperature markings. As the probe heats up, a metal coil inside expands, moving a needle to show the temperature. These thermometers are affordable, typically costing between $5 and $15. They work well for most home cooks but take slightly longer to register temperature—usually 15 to 20 seconds.

Digital instant-read thermometers use electronic sensors to measure temperature. They display numbers on a small screen and respond quickly, often within 2 to 5 seconds. Prices range from $15 to $40 for basic models. Many cooks prefer these because of their speed and accuracy. Some digital models include features like backlighting for use in low-light kitchens or wireless connectivity to send readings to your phone.

Oven-safe thermometers remain in the meat while it cooks in the oven. These typically have a longer probe and can withstand oven temperatures. They cost $10 to $25 and provide continuous temperature monitoring without removing the meat repeatedly. Many include an alarm that sounds when the target temperature is reached.

Infrared thermometers measure surface temperature without touching the meat. While fast and convenient, they measure only the outside, so they work best for checking if a surface has reached a certain heat level rather than confirming doneness throughout the meat.

• Dial thermometers: Affordable, durable, take 15-20 seconds to read
• Digital instant-read: Fast (2-5 seconds), accurate, battery-powered
• Oven-safe: Remains in meat, shows continuous temperature, includes alarms
• Infrared: Measures surface only, useful for specific applications

Practical Takeaway: For most home cooking, a digital instant-read thermometer offers the best balance of speed, accuracy, and affordability. If you roast meat frequently in the oven, an oven-safe thermometer may also be worth having on hand.

Food Safety Standards and Target Temperatures

The United States Department of Agriculture (USDA) publishes specific internal temperature guidelines for different meats. These temperatures are based on decades of food safety research. Following these standards reduces the risk of foodborne illness from bacteria like salmonella, E. coli, and listeria.

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Poultry, including chicken and turkey, must reach 165°F (74°C) throughout, whether it is ground or whole cuts. This temperature kills harmful bacteria that commonly contaminate poultry. The USDA emphasizes checking the thickest part of the meat, usually the thigh in whole birds, to ensure the entire piece has reached this temperature.

Ground meats—beef, pork, and lamb—should reach 160°F (71°C). Ground meat is more susceptible to bacterial contamination because grinding exposes more surface area to potential pathogens. This higher temperature requirement compared to whole cuts reflects that increased risk.

Whole cuts of beef, pork, and lamb have different guidelines. Beef steaks and roasts should reach 145°F (63°C) for medium-rare, which the USDA considers safe. Whole pork cuts also reach 145°F (63°C). Lamb reaches the same 145°F (63°C) standard. These lower temperatures compared to ground meat are possible because surface bacteria are killed through searing or cooking, and the solid structure of whole cuts prevents bacteria from spreading throughout.

Fish and shellfish should reach 145°F (63°C). This applies to all types of fish whether it is salmon, cod, or other varieties. The temperature is consistent regardless of the type of fish.

Eggs cooked in a dish or casserole must reach 160°F (71°C) to be considered safe, though many people eat runny eggs and accept that risk.

• Poultry (all types): 165°F (74°C)
• Ground beef, pork, lamb: 160°F (71°C)
• Whole cuts beef, pork, lamb: 145°F (63°C)
• Fish and shellfish: 145°F (63°C)
• Eggs in dishes: 160°F (71°C)

Practical Takeaway: Keep a reference chart or photograph of USDA temperatures on your phone or posted near your stove. Bookmark the USDA Food Safety website for updates, as guidelines can change based on new scientific findings.

Proper Thermometer Placement for Accurate Readings

Where you place the thermometer probe dramatically affects the accuracy of your reading. Meat cooks unevenly—the exterior reaches temperature before the center. Finding the correct spot ensures you measure the coolest part of the meat, which is where harmful bacteria are most likely to survive if the temperature is too low.

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For whole chickens or turkeys, insert the probe into the thickest part of the thigh without touching bone. The thigh is the last part to cook in poultry. Bone conducts heat differently than meat, so touching the bone gives an inaccurate high reading. Insert the probe from the inside of the thigh, angling it toward the thickest muscle away from the bone. Check temperature in at least two spots on the thigh to be thorough.

For chicken breasts, insert the probe horizontally into the thickest part, making sure it reaches the center without exiting the other side. Breasts cook faster than thighs, so check them separately if you are cooking a whole bird where parts may finish at different times.

For roasts and large cuts of beef, pork, or lamb, insert the probe into the center or thickest part of the meat. Position it so the tip is in the middle, not touching bone or fat. For a roast that is irregular in shape, check temperature in multiple spots—the center, toward one end, and toward the other end—since these areas may cook at different rates.

For hamburgers and other ground meat patties, insert the probe horizontally into the thickest part of the patty, reaching toward the center. With thin patties, inserting from the side usually works best. Ground meat should be uniform throughout, so one reading is typically sufficient, but checking two areas is safer.

For fish fillets, insert the probe into the thickest part of the fillet. If the fillet is thin and uniform, one reading is adequate. For thick fish steaks, check the center and ensure no part is underdone.

• Whole poultry: Thickest part of thigh, away from bone
• Chicken breasts: Horizontal insertion into thickest section
• Roasts: Center and multiple spots if irregular shape
• Ground meat: Horizontal into thickest part, reaching center
• Fish: Thickest section of fillet or steak

Practical Takeaway: Before inserting the thermometer, visually identify the thickest part of the meat. On your first few uses, cut into the meat after measuring to see if the cooked appearance matches the temperature reading. This visual confirmation helps you develop better placement skills for future cooking.

Reading Your Thermometer and Timing Considerations

Reading a thermometer correctly ensures you get accurate information. The method varies slightly depending on which type you are using, but the principle is the same: wait long enough for the probe to reach the meat's actual temperature before reading.

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With dial thermometers, insert the probe fully into the meat. Wait 15 to 20 seconds without removing it. The needle will gradually move as the metal coil inside heats up. Read the number where the needle points. If the needle is between two numbers, round up for food safety purposes. Dial thermometers can lose accuracy over time, so test them