# Thread: Pump power in Horsepower?

1. ## Pump power in Horsepower?

I've been given an example problem I can't workout.

(gamma, or w) Specific Weight= $9.81 kg/m^3$
$Q= 1 m^3/s$
Hp= 250

I think I should do the following:
wQH/550= 4.46 horsepower

But since the given values are in meters instead of feet do I need to change the equation?

2. Hi Quixotic,

You need to show all inputs in the units provided.For example you do not show the pump head. Any other info like pump efficiency?

bjh

3. Originally Posted by Quixotic
I've been given an example problem I can't workout.

(gamma, or w) Specific Weight= $9.81 kg/m^3$
$Q= 1 m^3/s$
Hp= 250

I think I should do the following:
wQH/550= 4.46 horsepower

But since the given values are in meters instead of feet do I need to change the equation?
I have no idea what you are talking about as well. But yes, you need to convert hp to metric or the other way around. One of the standards (not the only one, please note) is 550 ft-lbs/s = 746 W.

-Dan