aifithub

AI Fit Hub

Know your numbers. Train smarter.

Browse All Tools →

12 tools · Free · No signup

Tool Finder

12 tools shown

Nutrition

4 tools

Nutrition

TDEE

Estimate your daily energy expenditure with Mifflin-St Jeor + activity factors.
Nutrition

Macros

Convert calorie targets into protein, carbs, and fat grams for your goal.
Nutrition

Protein Intake

Get daily protein targets based on training level and goal.
Nutrition

Water Intake

Calculate daily water intake based on weight, activity level, and climate.

Strength

1 tool

Strength

1RM

Estimate one-rep max with Epley, Brzycki, and Lombardi formulas.

Cardio

1 tool

Cardio

Running Pace

Calculate pace per km and mile and project race finish times from one run.

Body Composition

4 tools

Body Composition

BMI

Calculate BMI quickly with a plain-language range explanation and limitations.
Body Composition

Body Fat %

Estimate body fat percentage using the U.S. Navy circumference method.
Body Composition

Ideal Weight

Compare Devine, Robinson, Miller, and Hamwi formulas as a realistic range.
Body Composition

Waist-to-Hip Ratio

Calculate waist-to-hip ratio and assess body composition using WHO guidelines.

Recovery

1 tool

Recovery

Heart Rate Zones

Calculate personalized training zones with the Karvonen method.

Planning

1 tool

Planning

Calorie Deficit

Estimate required daily calorie deficit for a target timeline and bodyweight change.