Calculators built from an ACE coaching framework and a habit of reading papers closely. Every number updates as you type — no submit button. All math runs in your browser; nothing is sent anywhere.
Daily calorie estimator
BMR (Mifflin–St Jeor) × activity × goal, with a macro split.
BMI & healthy range
WHO adult categories with a visual gauge.
Daily fluid target
Based on body mass, training load, and climate.
Heart rate training zones
Tanaka max-HR (208 − 0.7·age), or Karvonen if you know your RHR.
One-rep max & load table
Average of Epley + Brzycki, plus a percentage table for programming.
Research paper sanity check
Plug in the three numbers most papers report. Get a one-line take.