To establish a brand’s Net Promoter Score, we ask its customers if they would recommend the brand to someone else. To do so they rate the brand between 0 and 10, where 0 means they don’t recommend the brand at all and 10 means they would recommend it for sure. People who offer a grade between 0 and 6 are considered to be detractors. Those who give a grade between 7 and 8 are neutral and those who give between 9 and 10 are considered like brand advocates. Here is how you calculate your Net Promoter Score (NPS): Net Promoter Score (NPS): % Brand advocates – % Detractors.