What is the volume of the troposphere?

Volume of the Earth. 4 x ¶(6378.15)3 /3 = 10.8687 x 1020 m3

Radius from the centre of the Earth to the top of the troposphere:

= 6378.15 + 16 = 6394.15 km

Volume to the top of the troposphere.

4 x ¶(6394.15)3 /3 = 10.9506 x 1020 m3

Volume of the troposphere.

[10.9506 - 10.8687 ] x1020 m3 = 8.14 x 1018 m3

Assuming the density of the air is constant throughout the volume (the density is not constant as it decreases rapidly with height; it is 1.225 kg/m3 on the Earth's surface and 0.1654 kg/m3 at the top of the troposphere, 16 km):