Calculate cycling training power zones from functional threshold power.
All zones are expressed as percentages of FTP, so the whole model shifts when FTP changes. Power to weight matters on climbs while absolute power matters on the flat. An FTP set too high makes every zone too hard, which is why the twenty minute test is repeated rather than assumed to hold across a season.
Cycling Power Zone
Zones are fixed percentages of FTP; FTP is about 95 per cent of twenty minute power
These figures are population-average estimates for training and recreational planning only and are not medical advice. Individual responses vary widely. Consult a qualified health professional before starting or significantly changing an exercise, supplement or nutrition programme, particularly if you have any medical condition.
Zones are fixed percentages of FTP; FTP is about 95 per cent of twenty minute power All zones are expressed as percentages of FTP, so the whole model shifts when FTP changes. Power to weight matters on climbs while absolute power matters on the flat.
An FTP set too high makes every zone too hard, which is why the twenty minute test is repeated rather than assumed to hold across a season.
This calculator takes 3 inputs: Functional threshold power, Body weight, Twenty minute test power. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.