LV Calculator

Created by Łucja Zaborowska, MD, PhD candidate
Reviewed by Steven Wooding
Based on research by
Mizukoshi K, Takeuchi M, Nagata Y, Addetia K, Lang RM, Akashi YJ, Otsuji Y. Normal Values of Left Ventricular Mass Index Assessed by Transthoracic Three-Dimensional Echocardiography. Journal of the American Society of Echocardiography (January 2016)See 2 more sources
Weerakkody, Y. Left ventricular mass index. Reference article. (accessed on 11 Jul 2022)Galderisi M, Cosyns B, Edvardsen T, Cardim N, Delgado V, Di Salvo G, Donal E, Sade LE, Ernande L, Garbi M, Grapsa J, Hagendorff A, Kamp O, Magne J, Santoro C, Stefanidis A, Lancellotti P, Popescu B, Habib G Standardization of adult transthoracic echocardiography reporting in agreement with recent chamber quantification, diastolic function, and heart valve disease recommendations: an expert consensus document of the European Association of Cardiovascular Imaging European Heart Journal - Cardiovascular Imaging (December 2017)
Last updated: Jul 11, 2022

Our LV calculator allows you to painlessly evaluate the left ventricular mass, left ventricular mass index (LVMI for the heart), and the relative wall thickness (RWT).

Read on and discover all the details of our LV mass calculator and its variables:

  • Definitions of abnormal LV mass index
  • PWd normal range
  • IVSD in echo ❤️

Normal values of LV mass measurements in echo

We measure left ventricular mass to evaluate the risk and prognosis of patients with heart diseases and/or heart failure. We often use all the enumerated variables for diagnosis of conditions that may pose a significant risk to your patient's life and health.

Echocardiography measurements might be confusing, especially to those completely new to the field - that's why we decided to post all the necessary definitions needed for the correct evaluation of the measurements' values. You'll find them in the section below. ❣️

  1. LVMI - LV Mass Indexed to Body Surface Area

Women (g/m²)

43 - 95

Normal range

96 - 108

Mildly enlarged (abnormal)

109 - 121

Moderately enlarged (abnormal)


Severely enlarged (abnormal)

Men (g/m²)

49 - 115

Normal range

116 - 131

Mildly enlarged (abnormal)

132 - 148

Moderately enlarged (abnormal)


Severely enlarged (abnormal)

  1. RWT (Relative Wall Thickness)
  • If the LVMI exceeds 95 g/m² for women or 115 g/m² for men:
    • RWT >0.42 - Concentric hypertrophy
    • RWT ≤0.42 - Eccentric hypertrophy
  • If the LVMI ≤95 g/m² for women or ≤115 g/m² for men:
    • RWT >0.42 - Concentric remodeling
    • RWT ≤0.42 - Normal heart
Left ventricle mass versus relative wall thickness diagram
  1. LVEDD (Left Ventricle End Diastolic Dimension)

    Typical values: 39-56 mm

  2. IVSd (Interventricular Septal end Diastole measurement)

    Typical values: 0.6-1.1 cm

  3. PWd (Posterior Wall thickness at end-Diastole)

    Typical values: 0.6-1.1 cm

Hungry for knowledge? Discover our other heart tools for professionals:

How to use the left ventricular mass calculator?

  1. Enter your patient's sex and the body surface area (BSA)

    If you don't know the BSA - input their weight and height, and our tool will compute it automatically.

  2. Enter your patient's left ventricle end-diastolic dimension (LVEDD)

    We measure LVEDD using echocardiography. LVEDD is measured during end-diastole, that is the final moment of the relaxation of the heart. We measure the external diameter of the left ventricle of a heart.

  3. Enter your patient's interventricular septal end-diastole measurement (IVSd)

    It is also measured with echo. We evaluate the thickness of the wall that is located between two ventricles of a heart.

  4. Enter your patient's posterior wall thickness at end-diastole (PWd)

    Measured with echo. We measure the thickness of a heart's back wall at the end of the heart relaxation period (diastole).

Voilà! 🎉 Your results are here.

Our calculator will display the interpretation of the LV mass value and its relative wall thickness alongside the computed numerical values.

Are you happy with your results? Try our other heart calculators:

How to calculate the left ventricular mass?

LV mass calculations can be easily done single-handed - try it yourself!

❗ Our tool cannot be used as a substitute for clinical knowledge, judgment or medical professional's expertise. Always double-check your calculations.

Our LV mass index calculator uses the following equation:

LV Mass = (0.8 * [1.04 * ((LVEDD + IVSd + PWd)3 - LVEDD3)]) + 0.6,


  • LV mass stands for the left ventricular mass, given in grams (g);
  • LVEDD means the left ventricle end diastolic dimension, given in centimeters (cm);
  • IVSd is the interventricular septal end diastole, given in centimeters (cm);
  • PWd stands for the posterior wall thickness at end-diastole, given in centimeters (cm); and
  • 1.04 is the heart muscle density in g/cm³.

Let's follow a quick example:

Our patient's LVEDD is 10 mm, IVSd is equal to 6 mm, and PWd is 1 mm. We know that 1 cm = 10 mm.

LV Mass = (0.8 * [1.04 g/cm³ * ((1 cm + 0.6 cm +0.1 cm)3 - 13)]) + 0.6

LV Mass = (0.8 * [1.04 g/cm³ * ((1.7 cm)3 - 1)] ) + 0.6

LV Mass =( 0.8 * [1.04 g * ((1.7)3 - 1)]) + 0.6

LV Mass =( 0.8 * [1.04 g * 3.913]) + 0.6

LV Mass = 3.26 + 0.6 g

LV Mass = 3.86 g

How to calculate the LV mass index?

LV mass index is the short term for the LV Mass Indexed to Body Surface Area. We use the estimated surface of the body to evaluate the ratio of the left ventricle mass.

We used the following equation:

LVMI = LV mass / BSA,


  • LVMI means the left ventricular mass index, given in grams per square meters (g/m²);
  • LV mass stands for the left ventricular mass, calculated in the paragraph above, given in grams (g); and
  • BSA is the body surface area, calculated using your patient's weight and height, given in square meters (m²).
Łucja Zaborowska, MD, PhD candidate
Do you know body surface area?
Body Surface Area
Left ventricular mass
Relative Wall Thickness
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