My calculator takes all the arithmetic out of segmenting a race by pace. Simply entered the distances of your race segmentation (in miles or kilometers!) and the pace in minutes per mile you'd like to run each segment and the calculator does the rest! You'll get a segment split time as well as your total time.
This allows you see how running difference paces based on course conditions and other factors effects your overall total split times and finish time.
Here's a copy of my Race Finish Calculator that you can save off for yourself.
What do you think?