Hydraulic ram force calculation help?

[rockabillyjim]

Hi, I was wondering how to calculate the force of a hydraulic ram in Newtons if the piston diametre is 20mm and the oil pressure is 52 bars. I would like it if someone could explain the formula as i can only find it with psi and imperial units on google. Also I have the shaft diametre of 4mm, I don't know if this is relevant

Thanks
Jim

 

[SteamKing]

Formulas are generally given so that they work with consistent units. Are Newtons, mm, and bars consistent units?

 

[rockabillyjim]

I don't know. I probably sound a bit thick but I'm doing some homework for college and its beyond me.

 

[SteamKing]

Well, show us the formula you found online. We can start with that.

 

[rockabillyjim]

Ok here is the question. Calculate the force of the hydraulic ram when the oil pressure is 52 bars, the piston diameter is 20mm and the rod diameter is 4mm. I understand that I multiply the pressure by the area of the piston but I'm not sure weather I need to convert anything.
Thanks