Calculators
Run the numbers.
Use your lab results to build personalized training zones and calorie targets. No account, no signup.
VO₂ max → heart-rate zones
Your zones from your number.
Method
Zones calculated via Karvonen (heart-rate reserve). Max HR estimated as 220 − age — off by ±10 bpm for most people. For precise zones from your actual ventilatory thresholds, book a lab test.
RMR → calorie bands
How much to eat, every day.
Heightft / in
Sex
Method
Uses the Mifflin-St Jeor equation, generally within ±10% of a measured RMR. For your exact number and fuel mix, book an RMR test.
Want the real ones?
Estimates are fine. Measured is better.
A 45-minute test on a metabolic cart gives you numbers accurate to within 1%. You leave the same day with your real VO₂ max, thresholds, heart-rate zones, and RMR — no math required.
Book your test →