I make all my own potting compost using compost and soil that have both gone through a 1/4 in. sieve, and my plants absolutely love it. The precise proportions of each will depend on your own soil - if it is good medium loam you will need to add a little sharp sand, but as my soil is very sandy to start with I simply use 2 soil to 1 compost. If the mix is for plants that will only be in the pots for a month or two I add Blood,Fish & Bone at 4 ozs per 6 two gal. bucketsfull, but if is for longer term plants I add Osmacote Slow Release.
However, you should check the pH of your compost. It will probably come out at 6.5 or lower, in which case you will need to add an ounce or two of ground chalk to the mix unless you are potting calcifuges.
