## PDO Calculator

## What is PDO (SPSV%)?

PDO (or SPSV%) is the sum of a team’s shooting percentage and save percentage when both teams are at even strength.

PDO is based on the theory that team will regress to a PDO of 100%. A team with a PDO of more than 100% is seen as performing better than they actually are (and due for a bad luck streak). A team with a PDO of less than 100% may be performing worse than they actually are (and due for a lucky streak).

A player’s PDO is calculated using only the time they are on the ice. A team’s PDO is calculated for the entire team’s performance.

## Formula

PDO = Team’s Shooting Percentage + Team’s Save Percentage

- “Shooting Percentage” is the percentage of shots a team makes that count as goals. Do not include statistics from a shootout.
- “Save Percentage” is the percentage of saves a team makes. Include empty net statistics (unlike calculating a goalie’s save percentage). Do not include statistics from a shootout.

## Example

A team has a shooting percentage of 11.2% and a save percentage of 87.3%.

PDO = 11.2% + 87.3%

PDO = 98.5%

This team’s PDO would be 98.5%, or 0.985

## Frequently Asked Questions

##### What is SPSV% or PDO in Hockey?

PDO (or SPSV%) is the sum of a team’s shooting percentage (SP) and save percentage (SV). It is also known as “PDO.”

##### Why use PDO in hockey?

Fans of the PDO (SPSV%) statistic claim that PDO shows which teams will regress to the mean in the future.

A team with a PDO above 100% is performing better than they should, and due for a bad luck streak. A team with a PDO below 100% is performing worse than they should, and due for a lucky streak.

## Resources

- Wikipedia – Analytics (ice hockey) – Wikipedia entry on hockey analytics. Includes information on PDO (SPSV%) as well as Fenwick (SAT) and Corsi (USAT) calculations.
- Rule Books for the NHL and IIHF – Includes definitions on hockey terms (including the definition of a goal).
- Hockey-Reference.com – NHL Advanced Statistics / Analytics – Advanced player stats, including PDO.
- Natural StatTrick – Teamtable – Advanced stats on all teams in the NHL, including PDO.
- Fear the Fin – Non-Traditional Metrics Glossary: PDO – A detailed summary of PDO and its histroy.
- SportsNet – Corsi? PDO? Explaining some of hockey’s analytics terms – A summary of advanced hockey analytics.
- Arctic Ice Hockey – PDO: If you were going to understand just one NHL statistic – a simple overview of PDO.
- Puckology – PDO actually does what it says it does – An argument in favour of using the PDO statistic.