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 1909 days 100%
paddlingboardingisforme 10/10 2244 days 74%
caro 10/10 2275 days 72%
Kite_Noob 10/10 2275 days 72%
travelzzz 10/10 2336 days 67%
AndyCook 10/10 2397 days 63%
Virtual120 10/10 2397 days 63%
Mike_rankin 10/10 2581 days 49%
Bec 10/10 2581 days 49%
filey_fash 10/10 2640 days 44%
Hannie 10/10 2640 days 44%
frankhiggins 10/10 2732 days 37%
moochie 10/10 2762 days 35%
Heidi 10/10 2762 days 35%
conrad 10/10 2885 days 25%
Aileen Shepherd 10/10 2915 days 23%
Sarah 10/10 2915 days 23%
Nick G 10/10 2915 days 23%
Nicola Toscano 10/10 2946 days 21%
bradp 10/10 2946 days 21%
DerekNL 10/10 2974 days 19%
Dominique 9/10 2974 days 19%
Roger Doak 10/10 3005 days 16%
titan 10/10 3005 days 16%
frankboots 10/10 3036 days 14%
Bec Whiteman 10/10 3036 days 14%
Abi_C 10/10 3066 days 12%
vltowl 10/10 3097 days 9%
Sarah Riley 10/10 3219 days 0%


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

-7.28% Adjustment

There may be an adjustment if an experience hasn't received any reviews within the last 60 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 364 days.

The Kitesurf Nelson experience has been adjusted for 364 days. Adjustments are according to the following table.

Days Adjustment
361 -7.22%
362 -7.24%
363 -7.26%
364 -7.28%
365 -7.30%
366 -7.32%
367 -7.34%

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.