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FTP & Power Zones Calculator

Functional Threshold Power, W/kg and Coggan 7-zone model

Calculators

LT1/LT2

Lactate Analysis

7-zone

Power Zones

Free

Forever

FTP & Power Zones

Coggan 7-zone model from your 20-minute best power

Best 20-min power (W)

Body weight (kg)

Lactate Analysis

LT1, LT2, OBLA from blood lactate step tests

Progress Tracking

Track fitness trends across weeks and months

Training Zones

7-zone power, HR and pace zones for every sport

Coach Tools

Manage multiple athletes and share test reports

LaChart combines lactate testing, training analytics, Strava sync and coach collaboration in one platform.