Vital Capacity Formula and Calculator

To reduce the stress of calculating human breathing rate, a device that evaluates and calculates human respiration has been invented kudos to the dedication of natural sciences researchers. The vital capacity calculator predicts an individual’s oxygen airflow frequency based on their age, sexual preference, and height. Along with the vital capacity calculator, you must be able to know the vital capacity formula too.

To use simply a vital capacity calculator and only your age and height as criteria, you can compute the volume of air that goes past your lung. Just as with spirometric data, this calculator uses a vital capacity formula to calculate the mathematical aspect and output result.

Vital Capacity Of An individual

An individual’s vital capacity is the maximum volume of oxygen the individual can release from the respiratory tract upon taking the ultimate maximum possible air. The vital capacity of a person can be determined using a spirometer. The critical capacity can help with the early diagnosis of serious respiratory system illnesses like happy hypoxia and covid-19.

The vital capacity can be used to differentiate between different types of pulmonary illness. In serious respiratory infections, such as acute respiratory distress syndrome, vital capacity is reduced. In obstructive respiratory diseases like asthma or bronchiolitis, vital capacity is normal or considerably reduced.

The vital capacity could be utilized to measure the danger of respiratory organ interaction in any condition, especially neuromuscular disease, and to aid therapeutic choices in Guillain–Barré syndrome and myasthenia gravis. Around Three and Five liters is the usual threshold for vital capacity. The vital capacity of an individual is determined by various characteristics, including age, gender, and height.

The equation for calculating a male’s vital capacity

m = (21.78 – 0.101a) * h,


a is the male’s age and
h is the male’s height.
The method for finding a female’s vital capacity is

f = (27.63 – 0.112a) * h,

a is the female’s age and
h is the female’s height.

The vital capacity result is therefore displayed in milliliters and liters. Just enter the individual’s gender, age, and height, and then press the “Calculate” checkbox to begin using the calculator. The vital capacity (in milliliters and liters) will then be seamlessly calculated and displayed.

What Is The Vital Capacity Formula Used For?

The summation of the density of oxygen breathed and expelled during the breathing process, as well as the flow rate of breath that can be inhaled under pressure inhaling and breathed during pressure exhaling, is known as vital capacity.

Together with respiratory muscle performance, usable residual power, and total lung capacity, it is among the 4 pulmonary capabilities measured when functional respiratory assessment. The age of the patient is regarded as a determinant because vital capacity rises in the twenties and thirties before progressively reducing in the fifties.

Since taller people have larger vital capacity than people of average or deficient height, height is considered in the equations. This equation, established by Baldwin et al, can be used to assess an individual’s vital capacity:

for females: height * ( 21.78 – 0.101 * age )
for males: height * ( 27.63 – 0.112 * age )

The height must be specified in centimeters (cm) and the output in cubic centimeters (cm3) in such calculations, but you may simply swap from metric and imperial measurements in the calculator by tapping on the measurement label.

How To Use A Vital Capacity Calculator?

  • Select if you’re a man or a woman; the vital capacity calculation varies somewhat based on gender.
  • Input your age as in the year you’re born.
  • Input your height in the measures you chose.
  • The determined Vital Capacity is displayed in the calculator’s last box.
  • The vital capacity of a fit individual should be somewhere around three and five liters. Age, sex, weight, height, and ethnicity all influence this number.

The vital capacity is a criterion employed to distinguish among various types of respiratory illnesses. If it’s lower than normal, it’s a sign of the restrictive pulmonary condition, but with obstructive lung disease, the vital calculation is typically normal or moderately lower.

Benefits Of Using Vital Capacity Calculator

When determining the volume of individual airflow rates, the vital capacity calculator assists in obtaining precise answers. The calculator aids in the detection of major respiratory infections. It’s not difficult to use (see the procedure above to use the calculator.)

What’s The Total Lung, Inspiratory, And Vital Capacity Formula?

An oxygen consumption study called spirometry is used to examine respiratory performance. IRV stands for inspiratory reserve volume, TV for tidal volume, ERV for expiratory reserve volume, and RV for residual volume. 4 well-known lung capacities must be estimated to explain the outcomes: TLC stands for total lung capacity, while IC stands for inspiratory capacity, VC stands for vital capacity, and FRS stands for functional residual volume. Functional residual capacity, like vital capacity, is determined by residual volume, which is approximated using a series of equations rather than results obtained.

The 3 readings recorded while lung spirometry are usually used to determine the vital capacity


The extra measure of gas that can be forcefully breathed after a regular inhalation is known as inspiratory reserve volume.


The amount of oxygen breathed and released within a single typical breathing cycle (inhalation and exhale) is referred to as tidal volume.


The amount of oxygen that can be pulled vigorously when exhalation after the regular volume has been exhausted is known as the expiratory reserve volume.

According to pulmonary volume data, here is the vital capacity equation:



IRV stands for Inspiratory Reserve Volume,
TV stands for Tidal Volume,
ERV stands for Expiratory Reserve Volume.

This formula may produce an outcome that differs from the one shown by this calculator.

The vital capacity can be utilized to distinguish between respiratory illness sources. The vital capacity is reduced in restrictive lung syndrome. It is normally adequate or very mildly diminished in obstructive lung syndrome. Taller people have relatively high vital capacities (differences of 0.8L for every 6 in of height). Restrictive respiratory illnesses are indicated by less than usual readings (e.g. pulmonary fibrosis, pneumothorax).

Regular readings do not always imply the lack of pulmonary disorders; for instance, vital capacity may be intact or moderately diminished in obstructive respiratory illnesses (like asthma, emphysema, or chronic obstructive respiratory syndrome).

Different Way To Use Vital Capacity Formula

The spirometer captures respiratory tract capacities and other physiological data such as maximum exhalation air frequency as components of the standard ventilator respiratory function assessment. The vital capacity can also be calculated using the following equations, which are depending on the user’s gender, age, and height:

Vital capacity for men (in liters) = ((27.63 –112 x Age in years) x Height in cm) / 1000
Vital capacity for women (in liters) = ((21.78 –101 x Age in years) x Height in cm) / 1000.

Usefulness of Vital Capacity  and Calculator

The following are some of the benefits of determining vital capacity:

  •  Identifying and detecting chronic lung disorders;
  • determining the degree of respiratory tract impairment in neuromuscular illness;
  • Guillain-Barre syndrome therapy recommendations;
  • Control of the myasthenic crisis during therapy.


Knowing your vital capacity is critical to early detection of any serious respiratory system illnesses, as the popular saying goes, “prevention is better than cure.” The vital capacity calculator can assist you in obtaining an exact result for your airflow rate. Your exact height, age, and gender are the basic parameters you’ll need to use the calculator.


What is the Main Importance of Vital Capacity Formula?

The largest amount of oxygen that may be expelled following a maximal intake is known as vital capacity. The human body contains approximately 3.5–4.5 liters of water. It encourages the process of providing new air and removing stale air, hence promoting oxygen diffusion between tissues and the surrounding ecosystem.

What Are the Symptoms of Low Vital Capacity?

Temporary or lasting reductions in pressured vital capacity are possible. Severe bronchitis, emphysema, and bronchiectasis are all signs of a decreased FVC score. Idiopathic pulmonary fibrosis is an example of a restrictive respiratory illness.

What Does “Low Vital Capacity” Mean?

Restricted respiratory illnesses, in which the lungs are unable to expand adequately, are indicated by a substantially reduced vital capacity. If your vital capacity is adequate but your lungs aren’t working appropriately, it could be a sign of obstructive lung disease, a condition in which your lungs get congested or blocked in the air passages.

What Can You Do To Boost Your Vital Capacity?

A healthy lifestyle that includes heavy or deep breathing can result in a little rise in lung capacity. Nevertheless, the majority of the advantages of exercising come from improved muscular performance, blood flow, and heart function.

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