Altitude Performance Calculator

At altitude, reduced atmospheric pressure means less oxygen per breath. VO2max decreases approximately 1% per 100m above 1,500m, causing slower pace for the same perceived effort

The calculator uses the standard published formula for altitude performance. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches, percentages. You can enter values in the units shown — the calculator handles all conversions internally.

The calculator applies the standard formula for this type of calculation. See the 'How It Works' steps above for the detailed formula breakdown.