Your average DPS(Damage Per Second) is calculated using the values input in the fields above. The values you need to input are easily accessible from your characters in-game character screen. All you need to do is head to the Main Menu, Click on Character and then tab over to the Stats Screen. All the stats you need except Headshot Percentage are listed there.
This calculator gives you the chance to theorise builds and work out what gear pieces and weapons give you the most optimum damage outputs. Although the calculator is not 100% accurate, it is pretty close. Don’t lie in the Headshot Percentage field though as this will artificially inflate your results. If you only hit headshots 50% of the time, then only put in 50%. The website doesn’t judge you and neither do I, I’m not a great shot either.