Health & Fitness
Calculators.
Body metrics, nutrition, fitness performance, and women's health — measure what matters. Fitness & Performance
12 toolsTDEE, target heart rate, and pace are the three numbers that define every effective training plan. Whether you are optimizing a marathon schedule or hitting heart rate zones for fat burning, these calculators give you personalized benchmarks in seconds.
TDEE Calculator
Total Daily Energy Expenditure — calories burned per day based on activity level.
Heart Rate Zones
Target heart rate zones for fat burn, cardio, and peak performance.
Pace Calculator
Running pace, splits, and finish time for any distance.
One Rep Max
Estimate your 1RM strength using multiple proven formulas.
Army Body Fat
DoD circumference-based body fat estimation method.
Steps to Calories
Convert daily steps into calories burned with MET adjustments.
VO2 Max Calculator
Estimate aerobic capacity with Rockport, Cooper, and HR ratio methods.
Cycling FTP Calculator
Find your Functional Threshold Power and training zones from test results.
FFMI Calculator
Fat-Free Mass Index — quantify lean muscle development vs natural limits.
Cycling Power-to-Weight
Calculate W/kg, VAM, and your cycling performance category.
Swim Pace Calculator
Convert swim pace, estimate finish times, and find training zones.
Wilks Score Calculator
Compare powerlifting strength across bodyweight classes using Wilks 2020 and DOTS.
Weight Loss
6 toolsSustainable weight loss starts with understanding your body's baseline — BMI for quick screening, BMR for resting calorie burn, body fat percentage for body composition, and ideal weight ranges as a realistic target. Knowledge first, then action.
BMI Calculator
Body Mass Index with WHO weight category and healthy range.
Body Fat %
Estimate body fat percentage using skinfold or circumference.
Ideal Weight
Healthy weight range based on height, frame, and gender.
Calorie Calculator
Daily calorie needs for weight loss, gain, or maintenance.
BMR Calculator
Basal Metabolic Rate — calories burned at complete rest.
Waist-to-Height Ratio
WHtR — screen central obesity and cardiometabolic health risk.
Diet & Nutrition
6 toolsHitting protein, carb, and fat targets is what separates consistent results from guesswork. Build your personalized macro split, calculate your calorie deficit for weight loss, find your daily protein target, and nail your ketogenic macros — all in one place.
Macro Calculator
Personalized macronutrient ratios for any diet goal.
Water Intake
Daily hydration needs based on weight, activity, and climate.
Calorie Deficit
Weight loss timeline with adaptive thermogenesis modeling.
Keto Macros
Ketogenic diet macros with net carb and fat targets.
Protein Per Day
Optimal daily protein intake for your body and activity level.
Intermittent Fasting
Plan your IF schedule — 16:8, 18:6, OMAD, 5:2 with real-time fasting tracker.
Women's Health
10 toolsTrack your menstrual cycle, predict fertile windows, and estimate your due date with clinically-grounded calculators. Whether planning a pregnancy or simply understanding your cycle better, these tools provide science-backed insights from your own data.
Ovulation Tracker
Predict your fertile window and ovulation day.
Period Tracker
Menstrual cycle tracking with next period prediction.
Pregnancy Calculator
Due date, trimester timeline, and baby milestones.
Conception Date
Estimate when conception likely occurred.
Due Date
EDD from last menstrual period or conception date.
Pregnancy Weight
IOM-recommended weight gain by trimester and BMI.
hCG Levels
Beta hCG doubling time and progression analysis.
Implantation
DPO implantation window and early pregnancy timeline.
IVF Due Date Calculator
Calculate your due date from transfer date, with milestones and trimester progress.
Fertility by Age Calculator
Estimate natural and IVF success rates by age with egg freezing guide.
Clinical Tools
10 toolsInterpret lab results and clinical measurements with evidence-based tools. From A1c to blood pressure to kidney function, these calculators help you understand what your numbers mean — and when to talk to your doctor.
A1c Calculator
Convert HbA1c to average blood sugar and vice versa.
Blood Pressure
AHA category classification and cardiovascular risk level.
Cholesterol Ratio
Total/HDL ratio and cardiovascular risk assessment.
BAC Calculator
Blood alcohol content using the Widmark formula.
Drug Dosage
Weight-based OTC medication dosing calculator.
Framingham Risk
10-year cardiovascular disease risk score.
eGFR Calculator
Kidney function estimation and CKD staging.
Pack Year
Smoking history quantification and lung screening eligibility.
Alcohol Units Calculator
Track weekly alcohol units and estimate blood alcohol content by drink.
Vitamin D Calculator
Estimate IU from sun exposure and get personalized supplement dosing.
Mental Health & Sleep
4 toolsSleep quality directly impacts cognitive function, mood, and physical health. These tools help you optimize your sleep schedule by aligning with natural 90-minute cycles, track your sleep debt, time your last coffee, and quantify the real cost of chronic stress.