Free Version

30 Free Fitness Calculators

Launch with BMI, BMR, TDEE, macros, hydration and essential fitness tools.

Download Free

Quick Start

Build Fitness Pages Faster

Shortcodes and demo pages help you create calculator landing pages in minutes.

Open Free Demo

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Start Free, Grow to Pro

Begin with the free plugin and unlock advanced calculator workflows later.

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.fnfree{font-family:system-ui,-apple-system,sans-serif;color:#0f172a}.fnfree .wrap{max-width:1160px;margin:auto;padding:0 22px}.fnfree .hero{padding:70px 0;background:linear-gradient(135deg,#ecfdf5,#d1fae5);border-radius:28px}.fnfree h1{font-size:clamp(38px,6vw,66px);line-height:1.03;margin:10px 0}.fnfree h2{font-size:clamp(28px,4vw,40px)}.fnfree p{color:#475569;line-height:1.7}.fnfree .badge{display:inline-block;padding:7px 13px;border-radius:999px;background:#dcfce7;color:#166534;font-weight:800}.fnfree .btn{display:inline-block;padding:14px 22px;border-radius:12px;background:#16a34a;color:#fff;text-decoration:none;font-weight:800;margin:5px}.fnfree .btn.alt{background:#fff;color:#0f172a;border:1px solid #cbd5e1}.fnfree .grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.fnfree .card{background:#fff;border:1px solid #e2e8f0;border-radius:18px;padding:22px;box-shadow:0 12px 30px rgba(15,23,42,.06)}.fnfree .section{padding:52px 0}.fnfree img{width:100%;border-radius:22px}.fnfree ul{line-height:1.9;padding-left:20px}@media(max-width:850px){.fnfree .grid{grid-template-columns:1fr}}

FREE ON WORDPRESS.ORG

30 fitness calculators plus simple engagement tools.

Add BMI, BMR, TDEE, macros, body composition, heart-rate, running and nutrition calculators—then help visitors return with a local goal tracker, daily habit tracker and weekly wellness check-in.

Download FitNFO LiteOpen Live Demo

30 Working Calculators

Real formulas, metric and imperial inputs, searchable directory and single-calculator shortcodes.

Simple Goal Tracker

Visitors can set one fitness goal and monitor percentage progress in their own browser.

Five-Habit Tracker

Track water, workout, steps, sleep and protein completion for the current day.

Weekly Wellness Check-In

A non-medical snapshot covering energy, sleep, stress and workout consistency.

Privacy Friendly

Engagement-tool data remains in the visitor’s browser and is not sent to an external service.

WordPress Ready

Calculator Manager, Explorer, RTL support and shortcodes for Gutenberg and page builders.

Included free

• 30 calculators
• Goal tracker
• Five-habit tracker
• Weekly check-in
• Calculator Explorer
• Calculator on/off manager
• No API key required

Get the free plugin

Live FitNFO Lite Demo

FitNFO Lite

Real Fitness Calculators

Includes calculators 1 to 30, each with proper inputs and instant results.

#1 Lite

BMI Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="bmi-calculator"]

#2 Lite

BMR Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="bmr-calculator"]

#3 Lite

TDEE Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="tdee-calculator"]

#4 Lite

Calorie Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="calorie-calculator"]

#5 Lite

Body Fat Percentage Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="body-fat-percentage-calculator"]

#6 Lite

Ideal Weight Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="ideal-weight-calculator"]

#7 Lite

Macro Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="macro-calculator"]

#8 Lite

Protein Intake Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="protein-intake-calculator"]

#9 Lite

Water Intake Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="water-intake-calculator"]

#10 Lite

Calorie Burn Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="calorie-burn-calculator"]

#11 Lite

Heart Rate Zone Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="heart-rate-zone-calculator"]

#12 Lite

Target Heart Rate Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="target-heart-rate-calculator"]

#13 Lite

One Rep Max Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="one-rep-max-calculator"]

#14 Lite

Lean Body Mass Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="lean-body-mass-calculator"]

#15 Lite

Waist-to-Hip Ratio Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="waist-to-hip-ratio-calculator"]

#16 Lite

Waist-to-Height Ratio Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="waist-to-height-ratio-calculator"]

#17 Lite

Body Surface Area Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="body-surface-area-calculator"]

#18 Lite

Calories Burned Running Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="calories-burned-running-calculator"]

#19 Lite

Calories Burned Walking Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="calories-burned-walking-calculator"]

#20 Lite

Steps to Calories Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="steps-to-calories-calculator"]

#21 Lite

Pace Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="pace-calculator"]

#22 Lite

VO2 Max Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="vo2-max-calculator"]

#23 Lite

Maintenance Calorie Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="maintenance-calorie-calculator"]

#24 Lite

Weight Loss Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="weight-loss-calculator"]

#25 Lite

Weight Gain Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="weight-gain-calculator"]

#26 Lite

Pregnancy Weight Gain Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="pregnancy-weight-gain-calculator"]

#27 Lite

Daily Carb Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="daily-carb-calculator"]

#28 Lite

Sugar Intake Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="sugar-intake-calculator"]

#29 Lite

Body Frame Size Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="body-frame-size-calculator"]

#30 Lite

Fitness Age Calculator

Instant client-side calculation with proper inputs.

[fitnfo_calculator type="fitness-age-calculator"]

Educational fitness and wellness estimates only. Not medical advice.