How do you measure body volume? I need two ways. Thanks.

Displacement is a common method. Fill a barrel full of water, then dunk the body (letting the water overflow), remove the body, and then measure the water level.

Another method is to use air displacement, by Air Displacement Plethysmography, which uses sound changes in a resonant cavity. This is very often used for premature infants.

Thanks for your response. Is there another way other than using an Air Displacement Plethysmography? Something that can be done at home?
Thanks again.

Yes. It is a modification of the displacement method. It involves weighing the body when submerged (it will be negative if the person can float) and the weight when not in water. This difference, with the density of water (corrected for temperature of water) can give you the vollume of water displaced, or the volume of the body.

Yes, there is another way to measure body volume at home using a modified displacement method. Here's how you can do it:

1. Start by filling a bathtub or a large container with enough water to fully submerge your body. Make sure the water temperature is comfortable for you.

2. Get on a scale and record your weight. This will be your initial weight measurement.

3. Carefully step into the water, completely submerging your body. Make sure no air bubbles are trapped under your skin or clothing.

4. Once you are fully submerged, take note of your weight again. This will be your submerged weight measurement.

5. With these two weight measurements (initial weight and submerged weight), subtract the submerged weight from the initial weight. The resulting weight difference represents the weight of the water your body displaced.

6. To determine your body volume, you need to convert the weight of the water displaced into volume. To do this, you will need to know the density of water and the temperature of the water. You can find the density of water at different temperatures from reference sources or online.

7. Multiply the weight difference (in kg or pounds) by the reciprocal of the density of water (in kg/L or pounds/gallon) at the specific temperature of the water. The reciprocal is obtained by dividing 1 by the density of water.

8. The result of this calculation will give you an estimation of your body volume in liters or gallons.

It's important to note that this method provides an estimation and may not be as accurate as professional methods like Air Displacement Plethysmography. However, it can give you a rough idea of your body volume if you are looking to measure it at home.