Lot sizing without stop loss

Hi everyone,
can someone tell me how to calculate the lot size without specifying a stop loss??? Cause I don't use them.... I'd like to just set a risk % on my total capital and get the lot to place. Can someone help me out?

I have ever seen software using excel to calculate position size and risk, but I forget the source.
How to take the small risks I use the smallest position size 0.01 and increase when make double a hundred percent profit.

Oh unfortunately I know the classic calculation with indicating sl. As far as I remember Fxpro has a calculation. Maybe you should try to use it.