Altitude Converter

This tool converts altitude times to equivalent sea-level times. At higher elevations, reduced oxygen availability decreases aerobic performance, which increases race times. Therefore, the longer the distance (i.e., 10000m, Half-Marathon, Marathon, etc.) at higher altitudes the larger the conversion because they are more aerobic. This model uses standard conversion constants for every increase of 1000m in elevation, as follows:

• 800m: 1.0%
• 1600m: 1.8%
• 3200m: 2.2%
• 5000m: 2.5%
• 10000m: 2.8%
• Half-Marathon: 3.2%
• Marathon: 3.5%

Note: This tool provides estimated conversions and is not affiliated with or endorsed by the NCAA.