🧮 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.
🌡️ THI · FREE
How many kg of milk are your cows losing — right now?
Free · No sign-up
📊 24h Analysis (Preview)15. Juni
Max THI
92.0
Average THI
75.8
Stress Hours
14.5h
💡 Enter a location or manual values on the left to start the live milk loss calculation for your herd.
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
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