Free tools
Useful answers. Not the whole story.
These tools give you a smart place to start — no account, no email, no catch. Fitness calculations are estimates, not coaching. Your training history, progress, recovery, schedule, preferences and goals are what turn numbers into a plan. That’s where Aion comes in.
Start here
If you’re starting, restarting, or not sure what the first step even is.
Dial it in
If you’re already training and want the numbers.
TDEE calculatorHow many calories you burn in a day, from your stats and activity level.
Macro calculatorA starting split of protein, fat and carbs from your TDEE and your goal.
Protein targetA daily protein range, based on your goal and how often you train.
Goal Pace PlannerHow many weeks your goal weight might reasonably take at a sustainable pace.
One-rep maxAn estimated 1RM and training percentages from any hard set.
If you train people for a living
The business side — what to charge, how many clients fit, and what to take to your accountant.
A calculator sees your numbers. Aion sees the person behind them.