RFM Calculator

cm
cm
Measure at the narrowest point of the torso
Health Updated 14 Jun 2026

RFM Calculator is a health and wellness calculator that helps you calculate rfm values from your input data. The formula used is: Men: RFM = 64 − (20 × height (cm) / waist (cm))\nWomen: RFM = 76 − (20 × height (cm) / waist (cm)). Enter values using the units shown next to each input field (e.g. kg, cm, years).

Rates and fees change frequently. Always confirm the current figures with the official authority before relying on this result.
  • RFM was validated in a US population; accuracy may vary across ethnicities.
  • May be less accurate in very tall or very short individuals.

Formula

Men: RFM = 64 − (20 × height (cm) / waist (cm)) Women: RFM = 76 − (20 × height (cm) / waist (cm))
  • RFM Calculator gives you a fast estimate using your inputs and updates instantly when you change any value.
  • Formula: Men: RFM = 64 − (20 × height (cm) / waist (cm))\nWomen: RFM = 76 − (20 × height (cm) / waist (cm))
  • Input definitions: • Height: the numeric height used in the calculation • Waist Circumference: the numeric waist circumference used in the calculation
  • Manual method: write down each input, apply the formula step by step, then compare your manual result with the calculator output.
  • Enter values using the units shown next to each input field (e.g. kg, cm, years).
  • This calculator uses widely accepted health formulas and returns screening estimates only. It does not replace a diagnosis from a qualified healthcare professional.
  • Compare your result with published reference ranges. Values outside the normal range warrant a conversation with your doctor.
  • Practical tip: test a low, medium, and high scenario to understand sensitivity before making decisions.

Example Calculation

Inputs
  • Height: 170 cm
  • Waist Circumference: 80 cm

Suppose you enter: Height = 170, Waist Circumference = 80. The calculator applies the formula (Men: RFM = 64 − (20 × height (cm) / waist (cm))\nWomen: RFM = 76 − (20 × height (cm) / waist (cm))) and shows all output values below. Change any input field to immediately see how the result changes.

Frequently asked questions

What is the RFM?
The RFM Calculator is a health and wellness calculator that helps you calculate rfm values from your input data. Enter values using the units shown next to each input field (e.g. kg, cm, years).
When should I use this calculator?
Use this calculator whenever you need a quick, accurate result for rfm values from your input data without working through the arithmetic manually.
What units should I enter?
Enter values using the units shown next to each input field (e.g. kg, cm, years).
How accurate are the results?
This calculator uses widely accepted health formulas and returns screening estimates only. It does not replace a diagnosis from a qualified healthcare professional.
How do I interpret the result?
Compare your result with published reference ranges. Values outside the normal range warrant a conversation with your doctor.
How can I verify the calculation manually?
Use the displayed formula and work through the numbers step by step. If your manual result differs slightly, check rounding and unit conversions first.
Can I use this for planning and budgeting?
Yes. Run best-case, expected, and worst-case inputs to compare outcomes and make safer planning decisions.

Related calculators

BAI Calculator The BAI Calculator estimates your Body Adiposity Index — an estimate of body fat percentage from your hip circumference and height, without needing your weight. Enter your sex, height, and hip measurement, and it returns your BAI along with a category and the healthy range for your sex. BAI is an alternative to BMI that some find useful when weight isn't available. Body Fat Calculator Popular Estimate your body fat percentage with the US Navy circumference method. Enter your sex, height, and a few tape measurements to see your body fat percentage, category, and healthy range. Waist to Height Ratio Calculator Waist to Height Ratio Calculator is a health and wellness calculator that helps you calculate height measurements or conversions between unit systems. The formula used is: WHtR = Waist Circumference (cm) ÷ Height (cm)\nHealthy: WHtR < 0.50 (waist < half of height). Enter values using the units shown next to each input field (e.g. kg, cm, years). ABSI Calculator The ABSI (A Body Shape Index) calculator scores how much your waist size stands out for your height and weight, then compares it to population norms by sex to give a z-score and risk band. Enter your sex, age, weight, height and waist circumference. Because it adjusts for BMI and height, ABSI captures central-fat risk that BMI alone misses. BMI Calculator Popular Calculate your Body Mass Index (BMI) from your height and weight and see which category it falls into. Enter your weight and height and this calculator returns your BMI, its category, and the healthy weight range for your height.