🧮 THI Calculator

Calculate your herd's heat stress level in seconds

Enter your location — we fetch current weather data and calculate THI instantly. Or enter temperature and humidity manually.

The THI Scale at a Glance

Physiological responses and milk losses by stress level

The Cow as a Thermometer

Physiological response to heat stress by THI level

THI <68

No Stress

🫁 Resp.26–40/min

🌡 Rectal38.5 °C

💧 Water80–90 L

🥛 MilkNo losses

🌿 Calm · Grazing

THI 68–72

Mild Stress

🫁 Resp.40–60/min

🌡 Rectal38.5–39.0 °C

💧 Water90–100 L

🥛 Milk↓ 0.5–1 kg/day

💦 Restless · Early signs

THI 72–79

Moderate Stress

🫁 Resp.60–75/min

🌡 Rectal39.0–40.0 °C

💧 Water100–115 L

🥛 Milk↓ 1–3 kg/day

😵 Panting · Drooling

THI 79–89

Severe Stress

🫁 Resp.75–85/min

🌡 Rectal40.0–40.5 °C

💧 Water120–140 L

🥛 Milk↓ 3–6 kg/day

💧 Standing · Seeking water

THI ≥90

Emergency

🫁 Resp.>85/min

🌡 Rectal>40.5 °C

💧 Water140–160 L

🥛 Milk↓ >6 kg/day

🚨 Apathy · Collapse risk

Automatic THI monitoring for your farm

The full dashboard with live weather data, 7-day forecast and herd analysis