Sometimes your pattern tells you to increase evenly and having to put your needles down and start calculating is not a thing most of us are eager to do. I have saved you some trouble and made this simple calculator. Just enter the number of stitches you have and the number of stitches you want to increase and the calculator will do the math for you.
sts on my needles and sts.
Increase evenly across a round: (k14, m1) repeat 4 times.
Increase evenly across a row (balanced increase): k7, (m1, k14) repeat 3 times, m1, k7.
k = Knit
m1 = Make one. Pick up the bar between the stitch you knit and the one you’re about to knit, bringing the needle from front to back. Then knit into the back of the stitch.