Health & Fitness Calculators
Track your health metrics with BMI, calorie, body fat, and other health calculators.
20 free tools available - no signup required
Make informed decisions about your health and fitness goals with our suite of wellness calculators. Calculate your BMI, daily calorie needs, macro targets, ideal weight, and TDEE. We also offer insurance estimators for health, life, disability, and pet coverage so you can plan for both your physical and financial well-being.
Blood Alcohol Calculator
Estimate your blood alcohol concentration (BAC) with our free calculator. Enter your weight, gender, number of drinks, and time elapsed to see your estimated BAC level, impairment effects, and approximate time until sober. For educational purposes only.
BMI Calculator
Calculate your Body Mass Index (BMI) instantly with our free online BMI calculator. Enter your height and weight to see your BMI category, healthy weight range, and what your results mean for your health.
Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy method with our free calculator. Enter your measurements to get body fat %, fat mass, lean mass, and your body composition category.
Body Surface Area Calculator
Calculate your body surface area (BSA) using multiple formulas with our free calculator. Enter your height and weight to see BSA results from the Du Bois, Mosteller, Haycock, and Gehan-George methods, used in drug dosing, burn assessment, and clinical medicine.
Calorie Calculator
Calculate your daily calorie needs with our free calorie calculator. Uses the Mifflin-St Jeor equation to estimate BMR, maintenance calories, and targets for weight loss or gain based on your age, gender, height, weight, and activity level.
Disability Insurance Calculator
Estimate your disability insurance needs and premium costs with our free calculator. Enter your income, age, coverage percentage, and elimination period to see projected monthly benefits, estimated premiums, and recommended emergency savings.
Health Insurance Calculator
Estimate your health insurance premiums with our free calculator. Compare Bronze, Silver, Gold, and Platinum plan costs based on your age, coverage tier, and deductible preferences. Understand ACA marketplace pricing and out-of-pocket maximums.
Heart Rate Calculator
Calculate your target heart rate zones for exercise with our free heart rate calculator. Uses the Tanaka formula and Karvonen method to determine your max heart rate and five personalized training zones based on age and resting heart rate.
Home Insurance Calculator
Estimate your homeowners insurance premium with our free calculator. Enter your home value, deductible, and location risk level to see estimated annual and monthly costs, dwelling coverage, personal property coverage, and liability limits.
Ideal Weight Calculator
Calculate your ideal body weight using multiple formulas with our free calculator. See results from the Devine, Robinson, Miller, and Hamwi methods based on your height, gender, and frame size, plus a healthy BMI weight range.
Life Insurance Calculator
Estimate your term life insurance premiums with our free calculator. Enter your age, coverage amount, term length, and health status to see monthly and annual premium estimates, total cost over the term, and coverage recommendations.
Macro Calculator
Calculate your ideal macronutrient split with our free macro calculator. Get personalized protein, carbohydrate, and fat targets in grams and calories based on your TDEE, body weight, and fitness goals like fat loss, muscle gain, or maintenance.
One Rep Max Calculator
Estimate your one-rep max (1RM) for any lift with our free calculator. Enter the weight and reps from a recent set to see your estimated 1RM using the Epley, Brzycki, and Lombardi formulas, plus training load percentages for strength, hypertrophy, and endurance.
Pace Calculator
Calculate your running or walking pace, finish time, or distance with our free pace calculator. Convert between pace (min/mile or min/km) and speed (mph or km/h), estimate race finish times, and plan training paces for 5K, 10K, half marathon, and marathon.
Pet Insurance Calculator
Estimate pet insurance premiums for your dog or cat with our free calculator. Compare accident-only, accident + illness, and comprehensive plans based on pet type, age, deductible, and coverage level to find the best value.
Pregnancy Due Date Calculator
Estimate your pregnancy due date and trimester milestones with our free calculator. Enter the first day of your last menstrual period (LMP) to see your estimated due date, current gestational age, trimester dates, and key pregnancy milestones.
Sleep Calculator
Find your ideal bedtime or wake time with our free sleep calculator. Calculates optimal sleep and wake times based on 90-minute sleep cycles so you wake between cycles feeling refreshed, not groggy. Includes recommendations by age group.
TDEE Calculator
Calculate your Total Daily Energy Expenditure (TDEE) with our free calculator. Uses the Mifflin-St Jeor equation and activity multipliers to estimate how many calories you burn per day for weight management and nutrition planning.
Umbrella Insurance Calculator
Estimate your umbrella insurance premium and determine the right coverage level with our free calculator. Enter your net worth and risk profile to see costs for $1M to $5M in extra liability protection beyond your home and auto policies.
Water Intake Calculator
Calculate your recommended daily water intake with our free calculator. Enter your body weight, activity level, and climate to get a personalized hydration target in ounces, cups, and liters, plus tips for staying properly hydrated.
Health & Fitness Guides
BMI vs Body Fat Percentage: Which Actually Matters?
BMI is a height-weight ratio -- it has no idea how much of your weight is fat versus muscle. A 2016 study of 40,420 adults found that 30% of people with a normal BMI had metabolically obese body compositions. Here's how to read both numbers correctly.
8 min readHow Many Calories Should You Eat to Lose Weight?
A 500-calorie daily deficit produces roughly 1 pound of fat loss per week. Your exact target depends on your TDEE -- the total calories you burn each day -- which varies by weight, height, age, and activity level.
8 min readHow Much Life Insurance Do I Need? The DIME Method
The DIME method -- Debt, Income, Mortgage, Education -- gives you a concrete coverage target instead of a vague rule of thumb. Here's how to calculate it for your situation.
9 min readHow Much Water Should You Drink Per Day? The Science
The National Academies set total water intake at 3.7 liters (125 oz) per day for men and 2.7 liters (91 oz) for women -- but 20% of that comes from food. Your actual drinking target depends on body weight and activity level, not a fixed 8-glass rule.
7 min readReviewed & Methodology
Every calculator is built using industry-standard formulas, validated against authoritative sources, and reviewed by a credentialed financial professional. All calculations run privately in your browser - no data is stored or shared.