What health calculators are available on Calc4Health?

Calc4Health offers 17+ professional health calculators including BMI, BMR, TDEE, body fat percentage, target heart rate, daily water intake, waist-hip ratio, Cooper test, relative fat mass, body surface area, body adiposity index, body shape index, conicity index, heart rate zones, new BMI Trefethen calculator, Blood Alcohol Content (BAC) calculator, and Dietary Reference Intake (DRI) calculator.

Are Calc4Health calculators free to use?

Yes, all health calculators on Calc4Health are completely free to use. No registration or payment required. Access professional medical calculation tools instantly for your health and fitness monitoring needs.

How accurate are the health calculators?

Calc4Health calculators use scientifically validated formulas and equations from medical research. They provide accurate estimates based on established medical standards, though results should be used for reference and not replace professional medical advice.

What is a healthy body fat percentage?

For men: Essential fat 2-5%, Athletes 6-13%, Fitness 14-17%, Average 18-24%, Obese 25%+. For women: Essential fat 10-13%, Athletes 14-20%, Fitness 21-24%, Average 25-31%, Obese 32%+.

Which body fat calculation method is most accurate?

DEXA scan is the gold standard. For at-home methods, the Navy method is accurate for most people, while skinfold calipers can be very accurate when properly used.

How often should I measure body fat percentage?

Measure body fat percentage every 2-4 weeks for tracking progress. Daily measurements aren't recommended due to normal fluctuations.

Body Fat Percentage Calculator

Calculate your body fat percentage using the Jackson & Pollock skinfold formula. This method uses calipers to measure skinfold thickness at four body locations.

Skinfold Measurements

Measurement Instructions

Use calipers to measure skinfold thickness. All measurements are in millimeters (mm). Pinch skin and measure with calipers 1cm away from fingers.

Age

years

Gender

Tricep Skinfold

Back of upper arm, vertical fold

Bicep Skinfold

Front of upper arm, vertical fold

Subscapular Skinfold

Below shoulder blade, diagonal fold

Suprailiac Skinfold

Above hip bone, diagonal fold

Body Fat Result

Complete measurements to view your body composition

Jackson & Pollock Method

Uses skinfold calipers to measure body fat at four sites. This method calculates body density and converts it to body fat percentage using the Siri equation.

Measurement Tips

Use proper calipers and pinch skin firmly. Measure on the right side of the body. Take 2-3 measurements at each site and use the average.

Important Notes

Results are estimates. Body fat distribution varies between individuals. For medical decisions, consult a healthcare professional.

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Step 1: Sum of Skinfolds

Sum = Tricep + Bicep + Subscapular + Suprailiac (mm)

Step 2: Body Density (Jackson & Pollock)

Men: BD = 1.1125025 - (0.0013125 × Sum) + (0.0000055 × Sum²) - (0.000244 × Age)
Women: BD = 1.096095 - (0.0006952 × Sum) + (0.0000011 × Sum²) - (0.000714 × Age)

Step 3: Body Fat % (Siri Equation)

Body Fat % = ((4.95 / Body Density) - 4.5) × 100

Medical Reference

Wikipedia - Body Fat Percentage

Comprehensive information on body fat measurement methods including skinfold techniques, body density formulas, and the Siri equation.

View Wikipedia Article

Author

Dr. Beltrán J.F.