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.

Why is the New BMI formula better?

The New BMI uses an exponent of 2.5 instead of 2 for height, which better reflects how body weight scales with height. Standard BMI tends to overestimate for tall people and underestimate for short people. Trefethen's formula corrects this bias.

How different is New BMI from standard BMI?

For average height (5'9"/175cm), values are similar. For tall people (6'2"/188cm+), New BMI is about 1-2 points lower. For short people (5'2"/157cm-), New BMI is about 1-2 points higher. The difference increases with height extremes.

Should I use New BMI or standard BMI?

New BMI is more accurate for height extremes, but standard BMI remains the medical standard. Most health guidelines and research use standard BMI. Consider both values, especially if you're significantly shorter or taller than average.

New BMI (Trefethen) Calculator

Calculate your New BMI using the Trefethen formula that provides more accurate assessment for shorter and taller individuals by using height^2.5 instead of height^2.

Patient Information

Weight

Height

New BMI Result

Complete the form to view your calculation

What is New BMI?

The Trefethen formula (1.3 × weight/height^2.5) provides more accurate BMI assessment by using height^2.5 instead of height^2, better accounting for body scaling.

Height Correction

Standard BMI underestimates obesity in shorter people and overestimates it in taller people. The 2.5 exponent provides better accuracy.

Oxford Research

Developed by Oxford mathematician Nick Trefethen to provide more accurate obesity assessment based on empirical data analysis.

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New BMI (Trefethen) Formula

New BMI = 1.3 × weight(kg) / height(m)^2.5

Standard BMI Formula

BMI = weight(kg) / height(m)^2

Medical Reference

Wikipedia Reference

This calculator implements the New BMI (Trefethen) formula with exponent 2.5 as described in the Wikipedia article on Body Mass Index.

View Wikipedia Article

Author

Dr. Beltrán J.F.