Monitor Temperature-Humidity Index and protect your herd
Welcome to the most advanced THI (Temperature-Humidity Index) Calculator at www.aianimalfeed.com. Heat stress is one of the most significant financial drains on modern farms. It doesn't just affect milk production; it lowers fertility, reduces feed intake, increases disease susceptibility, and can even cause death in severe cases. This livestock heat stress calculator helps you monitor the exact environmental risk to your herd.
THI combines dry-bulb temperature and relative humidity into a single value. Why? Because animals cool themselves primarily through evaporative cooling (sweating and panting). If the humidity is high, evaporation is slow, and the animal feels much hotter than the thermometer suggests. For example, a temperature of 30°C (86°F) with 40% humidity is a THI of 76 (Mild Stress). But the same 30°C with 80% humidity is a THI of 84 (Moderate to Severe Stress).
By inputting your local weather data and selecting your species (dairy cows, beef cattle, buffalo, sheep, goats, or custom animals), this tool gives you the exact biological impact. Our integrated AI cooling analysis provides immediate, actionable recommendations—such as when to turn on sprinklers, adjust feeding times, or add rumen buffers—to protect your animals and your profits.
For dairy cattle, a THI below 72 is comfortable. A THI between 72 and 79 indicates mild stress, 80-89 indicates moderate stress, and above 90 indicates severe stress where immediate intervention is required.
When cows are heat-stressed, they eat less to reduce internal heat production. This drop in feed intake (especially forage) leads to rumen acidosis and a direct drop in milk yield. Fertility also drops drastically during heat stress.
The most effective method is combining forced air (fans) with water (sprinklers or misters). You must soak the cow to the skin and then use fans to evaporate the water, which cools the blood. Providing shade and feeding during cooler hours is also critical.
Yes. While they may have slightly different thresholds, sheep and goats are highly susceptible to heat stress, especially if they are heavily wooled or carrying a lot of fat. Shade and fresh water are absolutely essential.
The calculations provided by this tool are estimates based on standard industry THI charts. Individual animal responses to heat stress vary based on breed, age, health, and acclimation. Always monitor animals closely and consult a veterinarian for severe heat stress protocols.