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 Eco Rafting.

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

Eco Rafting

Valid Reviews

38 Valid Reviews

The Eco Rafting experience has a total of 38 valid reviews. There are no 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.

Within these 38 valid reviews, the experience has 1 face-to-face review collected during interviews by our team.

Below is the distribution of ratings for the 38 valid reviews:

Rating Count Percentage
10/10 34
9/10 3
8/10 1
7/10 0
6/10 0
5/10 0
4/10 0
3/10 0
2/10 0
1/10 0

98.68% Average

The raw data average (mean) for all the Eco Rafting valid reviews is 98.68% and is based on 38 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
Tom and Jemima Rawlings 8/10 1897 days 100%
GillClaireaux 9/10 1906 days 76%
ashewmaker 10/10 1936 days 74%
grant99 10/10 2181 days 64%
biabo 10/10 2210 days 63%
tommy_tom48 10/10 2210 days 63%
SarahB 10/10 2241 days 62%
Bonney 10/10 2302 days 59%
tjemery 10/10 2302 days 59%
Yaling 10/10 2302 days 59%
Bingo_Bing 10/10 2302 days 59%
Phanson 10/10 2516 days 50%
andybland1234 10/10 2547 days 49%
Joe_Lin 10/10 2547 days 49%
blondini006 10/10 2606 days 46%
richaxon 10/10 2606 days 46%
totlhip 10/10 2606 days 46%
the_catalpa 10/10 2637 days 45%
Toothpickcharlie 10/10 2881 days 35%
Rachel Smith 10/10 2940 days 32%
Kyler Toth 10/10 2940 days 32%
Roger25 10/10 2940 days 32%
Leah Stangle 10/10 2940 days 32%
Orla Goble 10/10 2971 days 31%
gsutton 10/10 2971 days 31%
Julz 10/10 2971 days 31%
flygirl 10/10 2971 days 31%
Misha 10/10 3002 days 29%
Pauline Wan 9/10 3032 days 28%
murraynkya 10/10 3124 days 24%
Kathy Martin 10/10 3277 days 18%
shiran 10/10 3295 days 17%
BOBT708 10/10 3296 days 17%
Courtney Smith 9/10 3296 days 17%
Freedom Rafter 10/10 3296 days 17%
gpollino 10/10 3330 days 16%
Ellie 10/10 3608 days 4%
Andrew Purdam 10/10 3702 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 Eco Rafting 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 Eco Rafting 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 Eco Rafting 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.