Tank Size dimensions

[Wiggler]

Hello everyone,

I've adopted 2 tanks from a friend who decided she no longer wanted them.

I currently have 1 10g reef tank running containing 1 clown, 1 sandsifter, 1 gorgonian coral and 1 turbo snail).

I would like to set up these other 2 tanks, but am not sure how many gallons they are.

Is there a formula to determine how many gallons??

First tank: 30 X 13 X 17

Second tank: 24 X 10 X 16

Thanks,
Pam