Ranking Score Explained

Hi there, thanks for your interest in how we calculate an experience's ranking score. It's at the core of Rankers so I'm pleased you're curious.

The ranking score percentage is used to compare and sort experiences in ranking tables. It is not necessarily a direct measurement of the quality of a particular experience as rated by its customers. I've found it a useful tool to allow me to find the best experiences with confidence. But I've also found it important to read the customer reviews before making any final judgements!

We calculate an experience's ranking score using a multi-factor data model instead of a raw data average (mean). This model takes into account several important questions. For instance - is there a trusted body of reviews? What is the age of a review and is the review from a credible source?

Below you'll find details around some of the important factors that went into calculating the ranking score for Kitesurf Nelson.

If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz. We don't believe this is perfect or complete so we're always interested in ways we might make improvements.

Nick Morrison's avatar

Nick Morrison

Rankers owner

Kitesurf Nelson

Valid Reviews

29 Valid Reviews

The Kitesurf Nelson experience has a total of 34 reviews. There are 29 valid reviews that are included when calculating the ranking score and 5 invalid reviews that are excluded from the calculation. Reviews can be excluded only when a reviewer is not verified or after an investigation by our team determines the reviewer is not genuine.

Below is the distribution of ratings for the 29 valid reviews:

Rating Count Percentage
10/10 28
9/10 1
8/10 0
7/10 0
6/10 0
5/10 0
4/10 0
3/10 0
2/10 0
1/10 0

99.66% Average

The raw data average (mean) for all the Kitesurf Nelson valid reviews is 99.66% and is based on 29 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.

Weighted Average


Rankers calculates a weighted mean as a base average on which we can improve. Individual review's ratings are given a weight based on several factors. The weight of a review determines the overall impact it'll have on the final weighted average.

Recent reviews have more weight as they are more relevant and reflect the experience as it currently operates. Over time reviews become less relevant and loose their impact on the ranking score.

Low rating reviews carry slightly less weight. This dampens the effect of very low ratings for every experience across the board. This is especially important when the experience has few reviews overall and a single negative rating can grossly mischaracterise an experience. Consistent poor reviews will still result in the experience receiving a comparitively low ranking score.

Credible sources provide reviews that can be trusted. If we have verified a reviewer is genuine via a face-to-face meeting then the review carries additional weight.

Reviewer Rating Age Relative Weight
Cmitchell 10/10 3032 days 100%
paddlingboardingisforme 10/10 3367 days 31%
caro 10/10 3398 days 25%
Kite_Noob 10/10 3398 days 25%
travelzzz 10/10 3459 days 13%
AndyCook 10/10 3520 days 0%
Virtual120 10/10 3520 days 0%
Mike_rankin 10/10 3704 days 78%
Bec 10/10 3704 days 78%
filey_fash 10/10 3763 days 78%
Hannie 10/10 3763 days 78%
frankhiggins 10/10 3855 days 78%
moochie 10/10 3885 days 78%
Heidi 10/10 3885 days 78%
conrad 10/10 4008 days 78%
Aileen Shepherd 10/10 4038 days 78%
Sarah 10/10 4038 days 78%
Nick G 10/10 4038 days 78%
Nicola Toscano 10/10 4069 days 78%
bradp 10/10 4069 days 78%
DerekNL 10/10 4097 days 78%
Dominique 9/10 4097 days 78%
Roger Doak 10/10 4128 days 78%
titan 10/10 4128 days 78%
frankboots 10/10 4159 days 78%
Bec Whiteman 10/10 4159 days 78%
Abi_C 10/10 4189 days 78%
vltowl 10/10 4220 days 78%
Sarah Riley 10/10 4342 days 78%


Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.

Sample Size Adjustment

No Adjustment

A reasonable number of reviews are necessary in order for the average to be credible and for an experience to take a prime position within the ranking tables. As such, experiences with only a few reviews have a moderated score. This does not mean that the experience or the reviews can't be trusted. The Kitesurf Nelson experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-3.34% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 70 days. However the Kitesurf Nelson experience does not meet the criteria for any adjustment.

In addition, an experience's ranking score may be adjusted for each day there is no new ranking. After 1 day the adjustment comes into effect. The maximum number of days that can be adjusted for is 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.

The Kitesurf Nelson experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -3.29%
198 -3.30%
199 -3.32%
200 -3.34%
201 -3.35%
202 -3.37%
203 -3.39%

Final Ranking Score


The final ranking score once adjustments and rounding has been applied. This value is cached and recalculated each day. Therefore it may not be precisely accurate based on the other values presented.

If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz.