Free tools

Six calculators. No account, no email, nothing gated — enter your numbers, get your answer. When you want the numbers turned into an actual plan, AION can build you one on the spot.

• TDEE calculator

  How many calories you burn in a day, from your stats and activity level.

• Macro calculator

  Daily protein, fat and carbs from your TDEE and your goal.

• Protein target

  How much protein to eat per day, based on how you train.

• Body composition

  Body fat percentage from tape measurements — the US Navy method.

• Goal timeline

  The calendar date you reach your goal weight at your chosen pace.

• One-rep max

  Your estimated 1RM and training percentages from any hard set.