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

24 Valid Reviews

The Waipu Caves experience has a total of 25 reviews. There are 24 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 24 valid reviews:

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

83.33% Average

The raw data average (mean) for all the Waipu Caves valid reviews is 83.33% and is based on 24 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
Olivia 6/10 17 days 85%
Kris 10/10 139 days 100%
Crystal 7/10 139 days 91%
Stefan Hohmann 8/10 323 days 81%
Serena 8/10 352 days 78%
Bran 10/10 352 days 82%
Adam 8/10 352 days 78%
Backpack On Fire 10/10 383 days 78%
Richard & Chris, UK 6/10 383 days 64%
HB 9/10 383 days 78%
Milly 7/10 414 days 67%
Lisa 9/10 444 days 70%
Stacey 10/10 444 days 70%
Calum Brash 6/10 475 days 53%
Emma 9/10 567 days 48%
Anthony 9/10 597 days 43%
Kristen 8/10 689 days 27%
JT 10/10 717 days 25%
Andrej 10/10 779 days 18%
Laurine 8/10 870 days 9%
Joseph 7/10 932 days 4%
Juliane 8/10 993 days 2%
Mikayla Candido 7/10 1129 days 0%
Debbie Lesurf 10/10 1151 days 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.