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 PureTrails New Zealand.

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

PureTrails New Zealand

Valid Reviews

45 Valid Reviews

The PureTrails New Zealand experience has a total of 46 reviews. There are 45 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 45 valid reviews:

Rating Count Percentage
10/10 32
9/10 13
8/10 0
7/10 0
6/10 0
5/10 0
4/10 0
3/10 0
2/10 0
1/10 0

97.11% Average

The raw data average (mean) for all the PureTrails New Zealand valid reviews is 97.11% and is based on 45 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
Anne Duncan 10/10 418 days 100%
Nick Smith 9/10 724 days 34%
Fiona 9/10 724 days 34%
Dianne Kidd 10/10 753 days 29%
David Darmanin 10/10 753 days 29%
Sam 10/10 784 days 25%
Julie B 10/10 815 days 20%
Janelle Varlow 10/10 845 days 17%
Helen Bryan 10/10 1059 days 3%
Geoff Bartlett 10/10 1090 days 2%
Diana Houtman 10/10 1090 days 2%
Mary Karl 10/10 1090 days 2%
fgiacoma 9/10 1118 days 2%
ross murray 10/10 1149 days 2%
Jane Geldenhuys 10/10 1180 days 2%
Ian Anderson 10/10 1180 days 2%
Ros Noone 9/10 1210 days 2%
Peter Hales 9/10 1424 days 2%
David Vinsen 10/10 1455 days 2%
Caroline Barber 9/10 1483 days 2%
Denise McMahon 9/10 1483 days 2%
cmh 10/10 1575 days 1%
John Marchment 10/10 1606 days 1%
Ian and Chris Homann 10/10 1820 days 1%
Nancy Stone 10/10 1848 days 1%
Graham Bamford 10/10 1879 days 1%
pauart 10/10 1940 days 1%
jennic 9/10 1971 days 1%
smithereen 10/10 2154 days 0%
Maryel 10/10 2154 days 0%
Woods 10/10 2185 days 0%
JennyT 10/10 2185 days 0%
maureenmf 10/10 2185 days 0%
frankie 10/10 2185 days 0%
FrancesJ 9/10 2185 days 0%
AlanWillow 10/10 2185 days 0%
cribble 9/10 2185 days 0%
shoanthomson 10/10 2185 days 0%
Montpellier 9/10 2214 days 0%
LIZ_MONTGOMERY 10/10 2245 days 0%
upmack 10/10 2245 days 0%
Michael73 10/10 2276 days 0%
LizH 10/10 2306 days 0%
lyndab 9/10 2306 days 0%
frendoj 9/10 2306 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 PureTrails New Zealand experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-6.78% Adjustment

There may be an adjustment if an experience hasn't received any reviews within the last 60 days. However the PureTrails New Zealand 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 PureTrails New Zealand experience has been adjusted for 339 days. Adjustments are according to the following table.

Days Adjustment
336 -6.72%
337 -6.74%
338 -6.76%
339 -6.78%
340 -6.80%
341 -6.82%
342 -6.84%

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.