NFT Rarity Calculator
Calculate trait rarity score and ranking within a collection.
About NFT Rarity Calculator
The two methods disagree systematically: sum-of-inverse rewards having one very rare trait, while the statistical product rewards rare combinations. Marketplaces generally use the former. Because ranking depends on the method, the same item can appear top-100 on one marketplace and mid-collection on another.
Formula
NFT Rarity
Rarity score = Σ(1 ÷ trait frequency); statistical rarity = product of frequencies
- rarity score
- Sum of inverse trait frequencies, the common marketplace method
- statistical rarity
- Product of frequencies, assuming traits are independent
Worked example
With the default values below, NFT Rarity Calculator returns Rarity Score of 317.222. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Collection sizeminimum 1
- 10,000
- Holders of trait 1minimum 1
- 500
- Holders of trait 2minimum 1
- 150
- Holders of trait 3minimum 1
- 1,200
- Holders of trait 4minimum 1
- 45
Results
- Rarity Score
- 317.222
- Statistical Rarity
- 0.000040%
- Rarest Trait Frequency
- 0.450%
- Expected Items With All Four Traits
- 0.0040
- Rarity Band
- Very rare
Step by step
- 1Values used
- 2NFT Rarity
- 3Rarity Score= 317.222
- 4Statistical Rarity= 0.000040
- 5Rarest Trait Frequency= 0.450
- 6Expected Items With All Four Traits= 0.0040
- 7Rarity Band= Very rare
Assumptions and limits
- The result is derived only from the 5 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 6 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is NFT Rarity calculated?
Rarity score = Σ(1 ÷ trait frequency); statistical rarity = product of frequencies The two methods disagree systematically: sum-of-inverse rewards having one very rare trait, while the statistical product rewards rare combinations. Marketplaces generally use the former.
Why does NFT Rarity matter?
Because ranking depends on the method, the same item can appear top-100 on one marketplace and mid-collection on another.
What values do I need to enter?
This calculator takes 5 inputs: Collection size, Holders of trait 1, Holders of trait 2, Holders of trait 3, Holders of trait 4. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.