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 Waipu Caves.

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

Waipu Caves

Valid Reviews

23 Valid Reviews

The Waipu Caves experience has a total of 24 reviews. There are 23 valid reviews that are included when calculating the ranking score and 1 invalid review 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 23 valid reviews:

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

84.35% Average

The raw data average (mean) for all the Waipu Caves valid reviews is 84.35% and is based on 23 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 Face-to-Face Weight Relative Weight
Kris 10/10 51 days 99.59 100%
Crystal 7/10 51 days 90.62 91%
Stefan Hohmann 8/10 235 days 86.69 86%
Serena 8/10 264 days 84.51 84%
Bran 10/10 264 days 88.96 89%
Adam 8/10 264 days 84.51 84%
Backpack On Fire 10/10 295 days 86.21 86%
Richard & Chris, UK 6/10 295 days 71.55 70%
HB 9/10 295 days 86.21 86%
Milly 7/10 326 days 75.67 75%
Lisa 9/10 356 days 79.92 79%
Stacey 10/10 356 days 79.92 79%
Calum Brash 6/10 387 days 63.3 62%
Emma 9/10 479 days 63.64 62%
Anthony 9/10 509 days 58.95 57%
Kristen 8/10 601 days 41.49 39%
JT 10/10 629 days 39.41 36%
Andrej 10/10 691 days 30.86 27%
Laurine 8/10 782 days 19.5 15%
Joseph 7/10 844 days 13.63 9%
Juliane 8/10 905 days 10.18 6%
Mikayla Candido 7/10 1041 days 4.97 0%
Debbie Lesurf 10/10 1063 days 5.16 0%


No Adjustment

Several adjustments to the weighted average may be added to improve relevancy and credibility. Waipu Caves does not meet the criteria for any of these adjustments to apply.

Final Ranking Score


The final ranking score once 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.