Melbourne, AU

Sanmarkan Nadeson

Explore tools →Contact

01 — Hello

This is where I keep the things I build. They’re all free, and more are on the way.

02 — Tools

Things I’ve built

Beta

Calorie Calculator

Work out your daily energy needs from your age, size and activity level.

Open tool →
Beta

One-Rep Max Estimator

Estimate your one-rep max from any set, with the percentages to train by.

Open tool →
Beta

Heart Rate Zones

Find your five training zones from your age, resting heart rate or lactate threshold.

Open tool →
Beta

VO2 Max Estimator

Estimate your VO2 max from a 12-minute run, a 1-mile walk or your heart rate.

Open tool →

Next tool in the works

03 — Contact

Say hello

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© 2026 Sanmarkan