Free Tool
VO2MAX ESTIMATOR
Estimate your aerobic ceiling from a ramp test or FTP — with age-adjusted percentiles and classification benchmarks.
FTP-based estimates carry an additional ~5% margin of error. MAP from a ramp test is more accurate.
METHODOLOGY
Formula:VO2max (ml/kg/min) = (10.8 x MAP / body weight in kg) + 7. This is the Hawley & Noakes (1992) equation, validated across trained and untrained populations and widely used in exercise physiology labs as a field estimate when gas exchange testing is unavailable.
MAP vs FTP: Maximum Aerobic Power is the final completed stage in a ramp test — a direct measure of peak aerobic output. When you select FTP, the tool estimates MAP as FTP x 1.20, a conservative ratio supported by published data (typically 1.18-1.25 depending on fibre-type distribution). This adds an extra layer of approximation — roughly +-5%.
Gold standard: Lab-based VO2max testing with expired gas analysis remains the definitive measure. This estimator gets you within the right range, but a result of 52 here could be 49 or 55 in the lab. Treat it as a benchmark for tracking change, not an absolute value.
Age and decline: VO2max drops roughly 5-10% per decade from age 30 in sedentary populations. But Pollock et al. demonstrated that masters athletes who maintain structured training show approximately 50% less decline — roughly 5% per decade instead of 10%. Your training history matters more than your birth certificate.
Percentiles: Age-adjusted percentiles are based on simplified ACSM (American College of Sports Medicine) normative data, grouped by decade. These represent general population fitness — active cyclists will typically sit in the upper quartiles.
Last updated: July 2026 · Tool version 1.0