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The correct way the measure vital capacity is by using a spirometer.
It can also be estimated this way:
Vital Capacity can be measured with a string, calculator, ruler and balloon, believe it or not. Blow up the balloon and let it out a few times to stretch the rubber. Then take a very deep breath and blow out all the air that you can into the balloon. Tie it off. Pass the piece of string around the widest part of it to measure it. Using the ruler, measure the string. (My VC is very good, it's 4.2, and so my string was about 60cm long.) Divide the meaurement of the string by pi (if you don't have suitable calculator, you can divide by 3.14 on a standard calculator) and compare the number to this chart: Balloon diameter (centimetres:)
is your final number that you got by dividing by pi. Balloon diameter: Approximate vital capacity in litres:
8 0.3
9 0.4
10 0.5
11 0.7
12 0.9
13 1.2
14 1.4
15 1.8
16 2.1
17 2.6
18 3.0
19 3.6
20 4.2
21 4.8 Chart provided by Mark Ash, Graeme Lofts, Merrin J. Evergreen, on page 163 of the Jacaranda Science textbook Book 2.
Theoretical vital capacity:
Look for Vital capacity in Wikipedia for the formula. There are also online calculators.
What else can I help you with?
What are four factors that can affect the vital capacity of a person?
Four factors that can affect the vital capacity of a person are age (vital capacity decreases with age), gender (males tend to have higher vital capacity than females), height (taller individuals usually have higher vital capacity), and physical fitness level (regular exercise can increase vital capacity).
How does your calculated vital capacity compare to recorded vital capacity?
tu mama
What is vital capacity of lungs?
the vital capacity of lungs is 3.5 liters to 4.5 litres
What is vital lung capacity?
vital lung capacity is how much air remains in your lungs after you exhale
For vital capacity what units are the measurements in?
My vital capacity is 1650cc (Yes, it's very low, but I'm twelve and I'm small). cc is used to measure vital capacity.
What might influence ones vital capacity?
bigger body surface area = bigger vital capacity
What is the lung capacity available for speech?
Vital Capacity (VC)
What is a teenage girls vital capacity supposed to be?
A teenage girl will likely have the same vital capacity as an adult woman. About 5 to 6 liters of air would be the vital capacity for a 15 year old female.
How is vital capacity determined?
Vital capacity is the amount of air you can breathe out after a maximum inhale. When it comes to determining vital capacity it’s basically calculated by the inspiratory reserve volume in addition to the expiratory reserve volume.
What is meant by relaxed and forced vital capacity?
force vital capacity is measure when the patient is ecxhating with maximal speed and effort
How might vital capacity be important to some musicians?
higher vital capacity should help them to go to high pitch
How do the values of the tidal volume and vital capacity compae?
tidal volume = 500cm sq. vital capacity = 4000cm sq.
