home insurance monthly payments

How do you calculate private mortgage insurance for a mortgage?
I am looking to buy a house and because I'm getting less than 20% I said I have to pay private mortgage insurance, I wonder what is the calculation to determine what my monthly PMI payment will be for a loan $ 115, 000.
Private mortgage insurance premiums are generally set by the insurance company secure the loan which is calculated with consideration to the loan amount must be insured. In the case of an FHA loan (government insured), to pay part of their upfront PMI (1.5% of the loan amount) and the rest (.5% / 12) in your monthly payment. In an FHA loan of $ 115,000 would be $ 1,725 at closing, plus a $ 47.92 monthly PMI. Plan of $ 67.03-$ Additional 86.25 per month, if not an FHA loan (.7% -. 9% divided by 12 months).