Heat & Altitude Calculator
Adjust your pace for heat, humidity, and altitude conditions
Heat & Altitude Pace Adjustment
Adjust your target pace based on temperature, humidity, and altitude
Minutes
Seconds
Your typical pace in ideal conditions
Heat Conditions
20°C
50%
Feels Like (Heat Index)
20°C
Altitude Impact
0 m
0 days
Time spent at altitude before race day (max benefit at 14+ days)
How It Works
• Heat: Performance decreases ~0.5% per degree above 25°C (77°F), with additional impact from humidity
• Altitude: ~1% performance decrease per 1000ft (300m) above 5000ft (1500m)
• Acclimatization: Can reduce altitude impact by up to 50% with 14+ days of adaptation
• These are general guidelines - individual responses vary significantly