FitNFO Live Demos — Try 130 Fitness Calculators Free

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FitNFO — Live Calculator Demos

Every calculator below is fully interactive. Enter your numbers and calculate instantly — 130 calculators across body composition, nutrition, strength, cardio and recovery, plus AI body analysis.

Body Composition

BMI Calculator

Enter your values and calculate instantly.

Weight (kg)

Height (cm)

Age

Gender

Activity

Navy Body Fat Calculator

Enter your values and calculate instantly.

Weight (kg)

Height (cm)

Age

Gender

Activity

Energy & Calories

TDEE Calculator

Enter your values and calculate instantly.

Weight (kg)

Height (cm)

Age

Gender

Activity

Calorie Deficit Calculator

Enter your values and calculate instantly.

Weight (kg)

Height (cm)

Age

Gender

Activity

Nutrition & Macros

Keto Macro Calculator

Enter your values and calculate instantly.

Weight (kg)

Height (cm)

Age

Gender

Activity

Water Intake Calculator

Enter your values and calculate instantly.

Weight (kg)

Height (cm)

Age

Gender

Activity

Strength & Power

One Rep Max Calculator

Enter your values and calculate instantly.

Weight (kg)

Height (cm)

Age

Gender

Activity

Wilks Score Calculator

Enter your values and calculate instantly.

Weight (kg)

Height (cm)

Age

Gender

Activity

Cardio & Endurance

Pace Calculator

Enter your values and calculate instantly.

Weight (kg)

Height (cm)

Age

Gender

Activity

VO2 Max Calculator

Enter your values and calculate instantly.

Weight (kg)

Height (cm)

Age

Gender

Activity

Recovery & Sleep

Sleep Calculator

Enter your values and calculate instantly.

Weight (kg)

Height (cm)

Age

Gender

Activity

Muscle Recovery Calculator

Enter your values and calculate instantly.

Weight (kg)

Height (cm)

Age

Gender

Activity

AI Features (Demo Mode)

These run on your own OpenAI/Anthropic key. Without a key they show a labeled sample so you can preview the experience.

Enterprise Module

AI Body & Goal Analyzer

Usage this month: 0 / Unlimited. Consent-gated photo interpretation plus safe math engine.

Required Consent

This AI analysis provides estimates only, based on the information and photo you provide. It is not a medical diagnosis, not professional advice, and makes no guarantees. Body composition cannot be precisely determined from a photo. Always consult a qualified doctor or dietitian before starting any weight program. By continuing, you acknowledge this is for educational and informational purposes only.

Persistent disclaimer: estimates only, not diagnosis, not professional advice, no guarantees. Photos are not stored by default.

Enterprise Meal Plan

AI Meal Plan Generator

Uses the same OpenAI/Anthropic provider settings, encrypted keys, failover, and monthly usage limits.

Meal Plan Disclaimer

Suggestions only, not a prescribed diet or medical/nutritional advice. Consult a dietitian. Allergy info is not guaranteed — always verify ingredients yourself.

Persistent disclaimer: suggestions only, not medical/nutritional advice. Allergy info is not guaranteed.

Browse the full set of 130 calculators on the Free, Pro and Enterprise pages.

Important: FitNFO calculators, reports, workout ideas, nutrition suggestions, and AI-assisted analysis are informational tools only. They are not medical advice. Always consult a qualified healthcare professional, registered dietitian, or certified trainer before making health, diet, exercise, or medical decisions.