Altitude correction calculator

How much slower will I run at altitude? Enter a sea-level time and target altitude.

Tiempo nivel del mar (MM:SS o HH:MM:SS) Altitud objetivo (m)

¿Aclimatado (>14 días)? No Sí

Calcular

Loss ≈ 1% per 300m above 1500m (not acclimatized). Acclimatized (>14 days) cuts that in half.