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Health & Fitness

Health calculators: BMI, Body Fat % (US Navy method), TDEE & Macro Calories, Daily Calorie Needs. Accurate, instant, no signup.

63 tools

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BMI Calculator

Calculate Body Mass Index (BMI) and classify health status by WHO standards.

#bmi#health#calculator

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Body Fat Calculator

Calculate body fat percentage accurately using the US Navy Logarithm formula. Also shows BMI, Lean Body Mass (LBM), and Basal Metabolic Rate (BMR). Free, no signup.

#body fat#navy#fitness

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TDEE & Macro Calculator

Calculate Total Daily Energy Expenditure (TDEE) and macro distribution (Protein/Fat/Carbs) for your weight loss, muscle gain, or maintenance goal.

#tdee#macro#calories

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Ideal Body Measurements

Calculate ideal body measurements using the Golden Ratio and John McCallum formula. Score your current proportions and compare with aesthetic targets. Free.

#ideal body#golden ratio#mcCallum

🤰

Pregnancy Due Date Calculator

Calculate your due date by LMP, conception date, IVF embryo transfer (Day 3/5), or ultrasound. Shows gestational age, trimesters, pregnancy milestones, and weekly baby size comparisons.

#pregnancy#due date#LMP

🪞

Face Shape Calculator

Upload a photo or use your camera to detect your face shape (Oval, Round, Square, Heart, Diamond, Oblong) using AI landmark analysis. Get personalized hairstyle and glasses recommendations. 100% browser-based — your photo never leaves your device.

#face shape#khuôn mặt#hairstyle

🔢

Numerology Calculator

Calculate your Life Path Number, draw your Pythagorean Birth Chart (3x3 grid), and get your 2026 Personal Year forecast. Discover your strengths, weaknesses, and life lessons.

#numerology#thần số học#life path

🐾

Pet Nutrition Calculator

Calculate your pet's daily calorie needs (RER/DER) and food portions for dogs and cats based on weight, activity level, and health status. Check toxic foods and get healthy topper suggestions.

#pet#dog#cat

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Daily Water Intake Calculator

Calculate personalized water intake based on weight, activity level, climate, and special conditions (pregnancy, breastfeeding). Check the urine color chart to assess your hydration status.

#water#hydration#health

🌸

Period & Fertility Calendar

100% private period & ovulation tracker. Enter your last period date & cycle length to get a 6-month fertility forecast, ovulation day, fertile window, and pregnancy chance indicator. All data stays in your browser.

#period#ovulation#fertility

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BAC & Sobriety Calculator

Estimate your Blood Alcohol Content (BAC) using the Widmark formula. Enter gender, weight, and drinks consumed to see intoxication level, sobriety countdown, and driving safety warnings.

#bac#alcohol#sobriety

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Sleep Cycle Optimizer

Find the ideal bedtime or wake-up time based on 90-minute sleep cycles. Includes NASA-standard Power Nap analysis and science-backed sleep stage explanations.

#sleep#sleep cycle#bedtime

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Deep Work Planner

Split your available time into optimal Focus and Break blocks using the 90/20 ultradian rhythm. Live countdown timer, energy waveform, and smart distraction handling.

#deep work#focus timer#pomodoro

☀️

Sun Exposure & Vitamin D Tracker

Calculate safe sun exposure time and vitamin D synthesis time based on your Fitzpatrick skin type and current UV index. Supports auto-fetch UV from your location.

#sun exposure#vitamin D#UV index

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Pregnancy-Safe Skincare Ingredient Checker

Paste your INCI ingredient list from any cosmetic label and instantly detect pregnancy-unsafe ingredients like Retinol, Hydroquinone, Phthalates, and more. Evidence-based, no sign-up needed.

#pregnancy#skincare#ingredients

☕

Caffeine Half-Life & Sleep Predictor

Log your coffee, tea, and energy drink intake. Get a precise 24-hour caffeine decay chart, crash window prediction, and optimal bedtime based on your metabolism speed (slow/normal/fast). Science-based, no sign-up needed.

#caffeine#sleep#coffee

⏳

Life Progress Bar

See how far through life you are — % elapsed, days/weeks/months remaining, and summers left to enjoy.

#life#progress#age

⏱️

Countdown Timer

Set a countdown timer by duration or target date/time. Quick presets (1min, 5min, 25min, 1hr), pause, resume, and reset. Urgency color indicator as time runs out.

#countdown timer#timer#stopwatch

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Habit Tracker

Build daily habits with streak tracking, GitHub-style annual heatmap, emoji+color customization, and a daily progress ring. All data saved in your browser locally.

#habit tracker#habit streaks#daily habits

🔥NEW

Calorie Deficit Calculator

Calculate your daily calorie deficit for weight loss. Uses Mifflin-St Jeor BMR formula with TDEE and macro breakdown.

#calorie deficit#calorie calculator#weight loss calories

💓NEW

Heart Rate Zone Calculator

Calculate your 5 heart rate training zones based on age and resting heart rate. Supports both Max HR and Karvonen methods.

#heart rate zones#target heart rate#cardio zones

🩺NEW

Blood Pressure Checker

Check your blood pressure reading against AHA guidelines. Get instant classification, pulse pressure, mean arterial pressure and health advice.

#blood pressure#blood pressure checker#hypertension

🌸NEW

Ovulation Calculator

Calculate your ovulation day, fertile window, next period, and next 3 cycles. Works with any menstrual cycle length.

#ovulation calculator#fertility calculator#fertile window

💪NEW

Macro Calculator

Calculate protein, fat, and carbs in grams by goal (muscle/loss/maintain/performance) with per-meal breakdown for 3 or 4 meals.

#macro calculator#macros calculator#protein carbs fat calculator

🥩NEW

Protein Intake Calculator

Calculate daily protein needs by weight, activity level, and goal. Get min/optimal/max protein targets, calories from protein, and per-meal targets.

#protein calculator#protein intake calculator#daily protein calculator

🏃NEW

Running Pace Calculator

Calculate running pace per km and per mile, speed in km/h, estimated race times for 5K/10K/half/full marathon, and training zones.

#running pace calculator#pace calculator#running pace per km

🔥NEW

BMR Calculator

Calculate your Basal Metabolic Rate using 3 formulas (Mifflin-St Jeor, Harris-Benedict, Katch-McArdle) with a full TDEE table for all activity levels.

#bmr calculator#basal metabolic rate#mifflin st jeor

⚖️NEW

Ideal Weight Calculator

Calculate your ideal body weight using 4 formulas (Devine, Robinson, Miller, Hamwi) plus a healthy BMI weight range (18.5–24.9).

#ideal weight calculator#ideal body weight#healthy weight calculator

🤰NEW

Due Date Calculator

Calculate your estimated due date using Naegele's rule. Get weeks pregnant, trimester breakdown, 12 key milestones and next 3 cycles.

#due date calculator#pregnancy due date#baby due date

⏱️NEW

Intermittent Fasting Calculator

Calculate your intermittent fasting schedule for 8 protocols (16:8, 18:6, 20:4, OMAD, 5:2, Warrior). Get exact fasting and eating windows with benefits and tips.

#intermittent fasting calculator#16 8 fasting#intermittent fasting schedule

👟NEW

Steps to Calories Calculator

Convert steps to calories burned using MET-based formula. Get activity classification, distance, fat burned, and weekly calorie projections.

#steps to calories#how many calories burned walking#10000 steps calories

🏋️NEW

One Rep Max Calculator

Calculate your one rep max (1RM) using 7 formulas (Epley, Brzycki, Lander, Lombardi, Mayhew, O'Conner, Wathen). Get full training load table from 67% to 100%.

#one rep max calculator#1rm calculator#max weight calculator

📏NEW

Waist-to-Hip Ratio Calculator

Calculate your waist-to-hip ratio (WHR) to assess cardiovascular risk using WHO standards. Find out if you have an apple or pear body shape.

#waist to hip ratio#waist hip ratio calculator#whr calculator

🫀NEW

Cholesterol Level Checker

Check your cholesterol levels against ACC/AHA 2018 guidelines. Get instant classification of Total, LDL, HDL, Triglycerides, and key ratios with health advice.

#cholesterol calculator#cholesterol level checker#ldl hdl ratio

☀️NEW

Vitamin D Calculator

Calculate vitamin D production from sun exposure using Fitzpatrick skin type, UV index by latitude, and Holick-based IU formula. Includes sunburn risk assessment.

#vitamin d calculator#sun exposure vitamin d#how much sun for vitamin d

🤱NEW

Pregnancy Weight Gain Calculator

Calculate recommended pregnancy weight gain by trimester using IOM 2009 guidelines. Based on pre-pregnancy BMI with twin support and full weight breakdown.

#pregnancy weight gain calculator#how much weight to gain during pregnancy#pregnancy weight calculator

🫁NEW

VO2 Max Calculator

Estimate your VO2 Max using Uth-Sørensen heart rate method plus optional Cooper 12-min run test. Get ACSM fitness classification and training recommendations.

#vo2 max calculator#vo2max test#cardio fitness calculator

💪NEW

Muscle Mass Calculator

Calculate skeletal muscle mass from body weight and body fat percentage. Get male/female benchmark table, natural genetic potential estimate, and muscle-building tips.

#muscle mass calculator#skeletal muscle mass#lean body mass calculator

⚓NEW

Navy Body Fat Calculator

Calculate body fat percentage using the US Navy tape measure method (DoD standard). Requires neck, waist, and hip measurements. ACSM classification included.

#navy body fat calculator#us navy body fat#body fat tape measure calculator

🔪NEW

Macros for Cutting Calculator

Calculate your optimal cutting macros for fat loss. Uses protein-first method with 22% TDEE deficit, refeed day structure, and weekly calorie cycling for maximum muscle preservation.

#macros for cutting#cutting diet macros#cutting phase calories

🔄NEW

Body Recomposition Calculator

Calculate your body recomposition macros to lose fat and build muscle simultaneously. Uses maintenance calories with calorie cycling (training vs rest days) for optimal recomp results.

#body recomposition#body recomp calculator#build muscle lose fat

💊NEW

Creatine Loading Calculator

Calculate your creatine loading phase dose and maintenance dose by body weight. Get a complete protocol with timing, dosing schedule, and evidence-based benefits of creatine supplementation.

#creatine loading calculator#creatine dosage#how much creatine to take

😴NEW

Sleep Debt Calculator

Calculate your cumulative sleep debt and cognitive impact. Enter your actual vs needed sleep hours and duration to get a recovery plan, risk assessment, and practical tips to repay sleep debt.

#sleep debt calculator#how much sleep do I need#sleep deprivation calculator

🌸NEW

Menstrual Cycle Calculator

Predict your next period dates and ovulation window. Enter your last period date and cycle length to get your next 3 periods, fertile window, current cycle phase, and hormonal insights.

#menstrual cycle calculator#period calculator#next period date

🧘NEW

Cortisol Reduction Planner

Get a personalized plan to lower cortisol naturally. Enter your stress level and sleep hours to receive a morning/daytime/evening protocol, evidence-ranked interventions, and supplement recommendations.

#cortisol reduction#how to lower cortisol#cortisol stress calculator

🥑NEW

Keto Calculator

Calculate personalized ketogenic diet macros (fat, protein, and net carbs) based on your body profile, activity level, and goals.

#keto calculator#ketogenic macros#keto diet calculator

🩸NEW

HbA1c Calculator

Convert your HbA1c percentage to Estimated Average Glucose (eAG) in both mg/dL and mmol/L automatically.

#hba1c calculator#a1c to glucose#hba1c to average blood sugar

🧬NEW

Biological Age Calculator

Calculate your true "biological age" based on your chronological age and current lifestyle habits including sleep, diet, exercise, and stress.

#biological age calculator#real age calculator#body age calculator

🚭NEW

Quit Smoking Calculator

Track your quit smoking journey: Calculate exact money saved, cigarettes avoided, and see your physical health recovery timeline.

#quit smoking calculator#smoking savings calculator#stop smoking timeline

🎯NEW

Target Weight Date Calculator

Set a target weight and date to instantly calculate the exact daily calorie limit and weekly loss rate required to reach your goal safely.

#weight loss target date#weight loss timeline#target weight calculator

🍼NEW

Conception Date Calculator

Find out exactly when you got pregnant. Back-calculate your conception date using either your expected due date or your last period.

#conception date calculator#reverse due date calculator#gestational age calculator

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Child Height Predictor

Calculate a child's predicted adult height using the Mid-Parental Height formula and the Khamis-Roche method for more accurate estimations.

#height#child#predictor

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Blood Type Calculator

Predict the probability of your child's blood type based on the mother's and father's blood types using Mendelian genetics.

#blood#type#genetics

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Calories Burned Calculator

Calculate the exact number of calories burned during exercise based on your body weight, workout duration, and activity intensity.

#calories#burned#exercise

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Carb Cycling Calculator

Plan a highly effective weekly macro cycle by alternating between High, Medium, and Low-carb days to maximize fat loss while maintaining muscle mass.

#carb#cycling#diet

📈

Reverse Dieting Calculator

Safely transition out of a calorie deficit and repair your metabolism by gradually increasing your caloric intake without gaining excess fat.

#reverse#dieting#metabolism

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Body Type Calculator

Determine your somatotype (Ectomorph, Mesomorph, Endomorph) based on your wrist size and body measurements, and get custom fitness recommendations.

#body#type#somatotype

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Sleep Quality Calculator

Score your sleep quality from 0–100 based on duration, disruptions, and lifestyle habits. Get personalized tips to improve your sleep.

#sleep#quality#score

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Testosterone Level Estimator

Estimate your testosterone level (Low / Normal / Optimal) based on age, BMI, activity level, and common symptoms. Get an action plan to optimize your hormones.

#testosterone#hormones#low-t

💤

Recovery Score Calculator

Calculate your daily recovery score (0–100) and get a training recommendation (Rest / Easy / Moderate / Train Hard) based on sleep, soreness, motivation, and resting heart rate.

#recovery#workout#gym

🧠

Cortisol Level Estimator

Estimate your cortisol (stress hormone) level based on daily stress, sleep, caffeine, exercise, and symptoms. Get a protocol to reduce or optimize cortisol naturally.

#cortisol#stress#hormones

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Hormone Balance Quiz

Identify which hormones are out of balance based on your symptoms. Map tiredness, acne, hair loss, mood swings, and low libido to suspected hormone imbalances.

#hormones#imbalance#thyroid

🥩

Anabolic Window Calculator

Calculate your post-workout anabolic window timing and exact macros to eat after training for maximum muscle protein synthesis.

#anabolic#window#post-workout

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