Golden Ratio Face
Compare eight facial measurement ratios with the golden ratio. Enter the 12 distances shown in the calculator to see their average ratio and how many fall within the calculator’s target range.
Appearance Calculators: Body, Hair and Skin
Explore estimates for body measurements, facial proportions, hair growth, sun protection, and sleep patterns. Body Mass Index, Body Fat, Waist to Hip Ratio, and Ideal Body Proportions calculators can help you understand your measurements and track changes over time. Try the Face Shape Detector and Golden Ratio Face calculator to explore facial proportions, or use Hair Density, Hair Growth, Sunscreen Amount, and SPF UVB Protection for hair-care and skin-care questions.These calculators are for anyone curious about their appearance or planning a personal care routine. Their results are estimates, not standards of attractiveness or medical diagnoses.
Calculators
Ideal Body Proportions
Enter your height to calculate eight height-based body circumference estimates, including chest, waist, arms, and legs. Use the results as proportions to examine, not prescribed targets.
Percentage Body Fat
Estimate body fat percentage from your gender selection, age, height, and weight. The calculator uses BMI and the Deurenberg formula; no body measurements are needed.
Hair Growth
Estimate how long it takes to grow your hair to a target length. Enter your current length, your goal and your monthly growth rate to get the time in months, weeks and an estimated date.
Waist to Height Ratio
Calculate your waist-to-height ratio from your waist circumference and height in centimeters. Select Male or Female to see the calculator’s interpretation.
Full Body Analysis
Enter your measurements, age, resting heart rate, activity level, and fitness goal to estimate BMI, body composition, calorie needs, and training heart rate.
Ideal Body Proportions
Estimate chest, waist, hip, arm, and other circumference targets from your wrist size. Select a unit system and enter your wrist circumference; metric input is recommended.
Shoulder to Waist Ratio
Enter your shoulder and waist circumferences in centimeters to calculate your shoulder-to-waist ratio and see the calculator’s V-shape rating.
3-Point Body Fat
Estimate body fat percentage and lean body mass from your age, weight, and pectoral, abdominal, and thigh skinfold measurements. Enter each skinfold thickness in millimeters.
Frame Size
Estimate your body frame size as small, medium, or large. Select Gender and enter your Height and Wrist circumference in centimeters.
Hair Density
Estimate your hair density in hairs per cm² (and per in²) from a counted sample of a known scalp area, then project the total hair count for any larger area such as the whole scalp.
Ideal Weight
Estimate weight from your height using the Robinson, Miller, Hamwi, and Devine formulas, plus two adult BMI reference weights. Select a unit system and gender, then enter your height.
Circumference Bodyfat
Estimate body fat percentage from your height, neck and waist measurements, plus hip circumference for women, using the U.S. Navy method.
Standards Height
Compare a height in centimeters with the calculator’s fixed reference average and range for men or women. Enter Gender, Date of Birth, and Height to see the difference from the average and your range status.
Hair Dye Quantity
Estimate how much hair dye, developer, and how many packages you need based on your hair length, thickness, and whether you are doing roots, a refresh, or a colour change.
BAI and BMI
Compare Body Adiposity Index (BAI) and Body Mass Index (BMI) using your hip circumference, height, and weight. Enter measurements in centimeters and kilograms to see both results.
Body Fat
Estimate body fat percentage from your weight and body measurements. Choose a unit system and gender, then enter the measurements requested by the calculator.
Body Mass for Women
Estimate body fat percentage and lean body mass from your age, weight, and seven skinfold measurements taken with calipers.
Body Mass Index
Calculate your Body Mass Index (BMI) from your height in centimeters and weight in kilograms. See your BMI and its weight-range interpretation.
Nail Growth
Estimate how many days your fingernails need to reach a target length. Enter your current nail length, the extra length you want, and your growth rate — optionally project your length on a future date.
Face Shape Detector
Enter your forehead, cheekbone, and jawline widths plus your face length to estimate your face shape from their proportions.
Bra Size
Estimate your bra size in US, UK or EU sizing from two tape measurements: a snug underbust circumference and a full bust circumference. Enter both in cm or inches and get band, cup and sister-size guidance.
Proportionality of Body
Compare your neck, upper arm, and lower leg circumferences with your hip circumference. Enter all four measurements in centimeters to calculate a body proportionality coefficient.
Perfume Bottle Lifespan
Estimate how long a perfume bottle will last based on its volume, the output per spray, sprays per use, and how often you wear it. Get total sprays, total wears, and weeks until empty.
SPF UVB Protection
Enter the SPF value from your sunscreen label to see what fraction of UVB radiation it blocks and transmits in idealized conditions, plus how to interpret the numbers correctly.
Body Mass For Men
Estimate body fat percentage and lean body mass with the Jackson–Pollock 7-site method for men. Enter your age, weight, and seven skinfold measurements.
Body Shape
Enter your bust, waist, high hip, and hip measurements to estimate your body shape. See your waist-to-hip ratio, measurement differences, and optional clothing ideas.
Hat Size
Convert your head circumference into US, UK and EU hat sizes, plus the head diameter and a general S–XL category. Enter your measurement in cm or inches and pick a sizing system.
Sunscreen Amount
Estimate how much sunscreen you need to cover your whole body, face, or a custom skin area, based on the medically recommended dose of 2 mg per cm². Enter your height and weight or face measurements to get the amount in grams, milliliters and teaspoons.
Waist to Hip Ratio
Calculate your waist-to-hip ratio from your waist and hip circumferences. Enter each measurement in centimeters or inches; you can use different units for the two fields.
Hair Transplant Grafts
Estimate how many hair transplant grafts you need. Enter the balding area to cover (cm² or in²), pick a target graft density, and get a low, typical and high graft count.
Body Adiposity Index
Estimate your Body Adiposity Index from your height and hip circumference. Select your units and gender to see the index and the calculator’s range classification.
UV Index Sunburn Time
Estimate how long your unprotected skin can take today's sun before burning. Enter the current UV index and your Fitzpatrick skin type to get your time to a sunburn-level UV dose.
Fitzpatrick Skin Type
Answer 10 questions about your eye, hair and skin color, ancestry and how your skin reacts to the sun to estimate your Fitzpatrick skin type (I–VI), with tailored sun-protection advice.
Army Body Fat
Estimate body fat using the Army one-site equation and compare it with the age-based limit. Enter your sex, age, body weight, and abdominal circumference.
Lean Body Mass
Estimate your lean body mass (LBM) from weight, height and sex using the Boer, James, Hume and Peters formulas, or get an exact value from your body fat percentage.
Sleep Efficiency
Enter your bedtime and wake time (or total hours in bed) plus the time you spent awake, and find out what percentage of your night in bed you were actually asleep — a key marker of sleep quality.
Sleep Debt
Enter your nightly sleep goal and how many hours you actually slept each night of the week. The calculator shows your total sleep debt or surplus, your average sleep, and a night-by-night breakdown.
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