Amy,

I always use a framing square with the tongue against the tread corner.
Where the end of the body lands is where I cut the post. The 2by hand
rail goes on top of that.

Good luck,

Pat

Amy L. wrote:
We just purchased our home and the deck off the house was not
completed. Everything was done except the handrails. We have all the
handrails completed around the deck except for the stairs.

I was wondering if their is a standard angle for the stair railing?
Is their a formula that should be used to calculate this?

Thanks
Amy.