Free Tools
Fitness Calculators
Evidence-based tools from SensAI's programming engine — free for everyone.
1RM Calculator
Estimate your one-rep max from any set using Epley, Brzycki, and Lander formulas.
Warm-Up Sets
Program-specific warmup ramps for SensAI, Starting Strength, 5×5, Greyskull LP, and max singles.
Heart Rate Zones
5-zone training ranges from age-based, max HR, or lactate threshold methods with optional Karvonen.
TDEE Calculator
Daily calorie needs and macro splits for fat loss, maintenance, and muscle gain.
RPE ↔ Percentage
Convert RPE to percentage of 1RM with the standard RTS chart. See reps in reserve instantly.
SensAI automates all of this
Connect your wearables and let AI handle the math — personalized training, recovery, and nutrition in one app.
