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Training Zones Calculator

Power, heart rate and run pace zones from your threshold values

Calculators

LT1/LT2

Lactate Analysis

7-zone

Power Zones

Free

Forever

Training Zones

Generate power, heart rate and run pace zones from threshold values

Fill in at least one field. All zones use your threshold values.

FTP (W) — power zones

LTHR (bpm) — HR zones

Threshold pace (mm:ss/km)

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.