Survey
Math.com
Simple calculators that help you win your NPS score!
Ever felt frustrated after getting a bad NPS customer survey? Did you realize you have no idea how NPS scores are calculated? Fear not! SurveyMath.com is here to answer all of your questions – and do all the complicated math for you.
Promoters Needed Calculator
Use this calculator when you get a negative “detractor” survey and you need to know how many positive “promoter” surveys you need to get to overcome it.
How to use this calculator: Simply enter the number of NPS surveys you’ve received to date, your current NPS score, and the average score you’re targeting. The Promoters Needed Calculator will automatically display the number of positive “promoter” surveys you’ll need to reach your NPS goal.
NPS Raw Scores Calculator
Use this calculator when you want to input your raw NPS surveys and find out your overall NPS score.
How to use this calculator: Simply enter the number of promoter, passive and detractor surveys you’ve received to date. The NPS Raw Scores Calculator will automatically display your current NPS score. If you’ve entered an NPS goal score, the calculator will also tell you how many positive “promoter” surveys you need to reach your goal.
About SurveyMath.com
SurveyMath.com is a simple, free website that helps take the mystery out of NPS (Net Promoter Score) customer surveys and how many positive “promoter” surveys you need to improve your score. As the number of surveys you receive increases over a review period, you can change the inputs and receive updated results in real time.
How NPS works: The SurveyMath.com calculators were built using the same basic math formulas that your employer uses to determine your NPS score. Conceptually, it’s a very simple formula: Your NPS score is the average of all of your survey scores. But it can get complicated very quickly.
Let’s take a closer look at how NPS works: A good survey, known as a “promoter,” counts as a score of 100%. A bad survey, known as a “detractor, counts as a score of -100%. A mediocre survey, known as a “passive,” counts as a score of 0%.
Let's say you get one “passive” survey. Your NPS score will be 0%. Next, let’s say you get a second survey that’s a “promoter,” which is a score of 100%. Your overall NPS score is now 50%. (The average of 0% and 100% is 50%.)
Let's use a more complicated scenario: two “promoter” surveys, one “passive,” and one “detractor.” Your overall NPS score is 25%. (The average of 100%, 100%, 0% and -100% is 25%.)
This is the core of all NPS math, and it’s on this principle that SurveyMath.com was built.
About the Developer
SurveyMath.com was developed by Thomas Moxham in 2015 to help colleagues in the retail sector understand and improve their NPS survey scores. Thomas is interested in designing other calculators that will make performance metrics more accessible and understandable to all of us. Contact Thomas with your suggestions, or visit his professional website.
