Originally Posted by

**rhyster** Hi

Does anyone know how to calculate how much volume of ballast is required to make an object buoyant?

I'm about to construct a floating golf green and would like to know how much ballast I would need to make it buoyant. I want to know how much volume of air will be required to make it float. Is there a simple equation that could give me this volume? I'd like to go about this scientifically rather than just shoving random numbers of air tight containers underneath!

What measurements do I require other than the mass of the object? I think this will be approximately 150kg.

Thanks in advance for any help you can give me.