Heat Index Converter

Temperature · Humidity · Feels Like · Heat Risk · Heat Illness Prevention

Actual Temperature

Relative Humidity (%)

Feels Like Temperature (Heat Index)

105 °F

⚠️ Extreme Caution - Heat illness possible

🌡️ Actual Temp 90 °F

💧 Humidity 65 %

🥵 Feels Like 105 °F

Humidity	80°F	85°F	90°F	95°F	100°F	105°F
40%	80	84	88	93	98	105
50%	81	86	91	97	105	115
60%	82	88	95	103	113	127
70%	84	91	99	109	122	140
80%	86	94	104	116	131	153
90%	88	97	109	123	140	167

🟡 Caution (80-90°F) Fatigue possible with prolonged exposure

🟠 Extreme Caution (90-103°F) Heat cramps and heat exhaustion possible

🔴 Danger (103-124°F) Heat exhaustion likely, heat stroke possible

🟣 Extreme Danger (125°F+) Heat stroke highly likely - stay indoors

😓 Heat Exhaustion Heavy sweating, weakness, cold/pale skin, nausea, fainting

🥵 Heat Stroke High body temperature (103°F+), hot/red skin, confusion, loss of consciousness

🚨 Heat stroke is a medical emergency! Call 911 immediately.

💧 Drink water every 15-20 minutes

🧢 Wear light-colored, loose clothing

🏠 Stay in air-conditioned spaces

⏰ Avoid outdoor activity 10 AM - 4 PM

🚗 Never leave children/pets in cars

🧴 Use sunscreen (SPF 30+)

🌡️ Heat index calculation

🥵 Heat risk assessment

🚨 Heat illness prevention

💧 Humidity integration

Humidity	80°F	85°F	90°F	95°F	100°F	105°F
40%	80	84	88	93	98	105
50%	81	86	91	97	105	115
60%	82	88	95	103	113	127
70%	84	91	99	109	122	140
80%	86	94	104	116	131	153
90%	88	97	109	123	140	167

Humidity	80°F	85°F	90°F	95°F	100°F	105°F
40%	80	84	88	93	98	105
50%	81	86	91	97	105	115
60%	82	88	95	103	113	127
70%	84	91	99	109	122	140
80%	86	94	104	116	131	153
90%	88	97	109	123	140	167

Humidity	80°F	85°F	90°F	95°F	100°F	105°F
40%	80	84	88	93	98	105
50%	81	86	91	97	105	115
60%	82	88	95	103	113	127
70%	84	91	99	109	122	140
80%	86	94	104	116	131	153
90%	88	97	109	123	140	167