Your fitness goals, calculated & planned
Free fitness calculators for BMI, calories, macros, body fat, and more. Plus AI-powered personalized diet plans tailored to your goals, preferences, and health conditions.
Fitness & nutrition calculators
Instant results powered by scientifically-backed formulas. No sign-up required.
BMI Calculator
Calculate your Body Mass Index and find your ideal weight range.
Calorie Calculator
Find your daily calorie needs for weight loss, maintenance, or gain.
Macro Calculator
Get your ideal protein, carb, and fat split based on your goals.
Water Intake Calculator
Calculate how much water you need daily based on weight and activity.
Body Fat Calculator
Estimate your body fat percentage using the US Navy method.
BMR Calculator
Calculate your Basal Metabolic Rate — calories burned at rest.
TDEE Calculator
Find your Total Daily Energy Expenditure including activity level.
Ideal Weight Calculator
Find your ideal weight using 4 scientifically-backed formulas.
Lean Body Mass Calculator
Calculate your lean body mass using multiple proven formulas.
Protein Intake Calculator
Get your recommended daily protein intake for your goals.
1RM Strength Calculator
Calculate your one-rep max and get a full percentage chart.
Calories Burned Calculator
Estimate calories burned for 25+ exercises and activities.
Personalized plans with AI
Get custom diet plans, workout routines, and recipes generated by AI based on your unique profile.
AI Diet Plan Generator
AIGet a personalized weekly diet plan powered by AI based on your goals and preferences.
AI Workout Plan Generator
AIGenerate a custom weekly workout routine tailored to your fitness level.
Weekly Meal Planner
AIPlan your weekly meals with balanced nutrition and variety.
Healthy Recipe Generator
AIGenerate healthy recipes that match your dietary needs and preferences.
Why FitTools AI?
Science-backed formulas
Every calculator uses peer-reviewed equations like Mifflin-St Jeor, US Navy, and Epley.
AI personalization
Diet plans respect your allergies, health conditions, budget, and cooking preferences.
Track your progress
Log weight, calories, and measurements. Visualize your journey with charts.
Ready to transform your fitness?
Start with a free calculator or generate your personalized AI diet plan in minutes.