Pdo S Sv Calculator
Free Pdo s% sv% Calculator for hockey. Enter your stats to get performance metrics and improvement targets. See charts, tables, and visual results.
Reviewed for accuracy by Sher, Sports Science & Nutrition Specialist
Pdo S Sv Calculator
Calculator
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Formula: PDO = (Shooting% x 10) + (Save% x 10)
Worked example — PDO = 1029.8 (Running Very Hot -- expect regression toward 1000)
Formula
PDO = (Shooting% x 10) + (Save% x 10)
PDO combines team shooting percentage and save percentage on a 1000-point scale. A value of 1000 is league average. Higher values suggest hot shooting and goaltending, lower values suggest cold performance. PDO tends to regress toward 1000.
Worked Examples
Example 1: High PDO Team Analysis
Problem:A team has scored 62 goals on 700 shots and allowed 40 goals on 680 shots over 20 games.
Solution:Shooting% = 62/700 = 8.86% Save% = (680-40)/680 = 640/680 = 94.12% PDO = (8.86 x 10) + (94.12 x 10) PDO = 88.6 + 941.2 = 1029.8 Deviation from 1000 = +29.8
Result:PDO = 1029.8 (Running Very Hot -- expect regression toward 1000)
Example 2: Low PDO Team Due for Improvement
Problem:A struggling team: 38 goals on 720 shots, 55 goals against on 640 shots, 22 games.
Solution:Shooting% = 38/720 = 5.28% Save% = (640-55)/640 = 585/640 = 91.41% PDO = (5.28 x 10) + (91.41 x 10) PDO = 52.8 + 914.1 = 966.9 Deviation from 1000 = -33.1
Result:PDO = 966.9 (Very Unlucky -- strong candidate for improvement)
Frequently Asked Questions
What is PDO in hockey and what does it measure?
PDO is a hockey analytics metric that combines a team shooting percentage (S%) and save percentage (SV%) into a single number, typically expressed on a 1000-point scale. The formula is PDO = (Shooting% x 10) + (Save% x 10), where 1000 represents the league average. PDO was named after the online alias of its creator, a hockey analytics blogger. The key insight behind PDO is that over large sample sizes, both shooting percentage and save percentage tend to regress toward league averages, meaning teams with extremely high or low PDOs are likely experiencing temporary luck rather than sustainable performance. It serves as a regression indicator.
Why does PDO always average out to 1000 across the league?
PDO must average to 1000 across the entire league because every goal scored by one team is simultaneously a goal allowed by another team. If one team shooting percentage goes up, another team save percentage goes down by the exact same amount. This mathematical certainty means that while individual teams can deviate significantly from 1000 in any given stretch, the league as a whole always averages exactly 1000. This zero-sum property makes PDO uniquely useful for identifying teams that are likely to regress, because extreme PDO values (above 1020 or below 980) are mathematically unsustainable for an entire season and almost always move back toward 1000.
What is considered a normal range for team PDO?
Over a full NHL season, most teams finish with PDOs between 985 and 1015, with the true average being exactly 1000. A PDO above 1020 is considered very high and strongly suggests the team is overperforming relative to their underlying play, while a PDO below 980 suggests significant underperformance. During shorter stretches of 10 to 20 games, PDO can swing much more wildly, with values above 1040 or below 960 not being uncommon. However, these extreme values virtually never sustain over a full 82-game season. The highest team PDOs in recent NHL history have been around 1035 to 1040 for a full season, which is exceptionally rare.
How can PDO help predict future team performance?
PDO is one of the most reliable regression indicators in hockey analytics. Teams with very high PDOs (above 1020) in the first half of a season tend to see their results decline in the second half as their shooting and save percentages return toward normal. Conversely, teams with very low PDOs (below 980) often improve significantly as luck evens out. Analysts use PDO alongside possession metrics like Corsi and Fenwick to separate genuine talent from temporary variance. A team with strong possession numbers but a low PDO is considered a prime candidate for improvement, while a team winning despite poor possession and high PDO is likely headed for a correction.
What is the difference between team PDO and individual player PDO?
Team PDO measures the combined shooting and save percentages of the entire team, while individual player PDO (sometimes called on-ice PDO) measures the shooting and save percentages that occur when a specific player is on the ice. Individual PDO can be influenced by the player linemates, opponents, and zone starts, making it more complex to interpret. Some elite players can sustain above-average individual PDOs because they genuinely elevate their team shooting percentage through skill. However, the save percentage component of individual PDO is largely outside a skater control, so extreme individual PDOs still tend to regress toward the mean.
Does PDO account for shot quality differences between teams?
No, standard PDO does not account for shot quality, which is one of its primary limitations. A team that generates high-quality chances from the slot will naturally have a higher shooting percentage, and a team with strong defensive structure may legitimately sustain a higher save percentage by limiting dangerous scoring opportunities. This means that some deviation from 1000 can be skill-based rather than luck-based. To address this, some analysts use expected goals (xG) based PDO, which adjusts for shot quality. Expected goals PDO compares actual goals to expected goals based on shot location and type, providing a more nuanced view of sustainability.
How does even-strength PDO differ from all-situations PDO?
Even-strength PDO (5v5 PDO) only includes goals and shots from even-strength play, while all-situations PDO includes power play and penalty kill data as well. Most analysts prefer even-strength PDO because it removes the distortion caused by special teams, which can vary significantly based on personnel and coaching strategy. A team with an elite power play will have an inflated all-situations PDO that may not accurately reflect their even-strength sustainability. Even-strength PDO also tends to regress more predictably toward 1000 because the 5v5 game involves less strategic variance. For the most accurate regression analysis, even-strength PDO is the standard.
Can a team sustain a PDO significantly above 1000 for an entire season?
While rare, it is possible for teams to sustain PDOs moderately above 1000 for a full season, typically in the 1010 to 1025 range. This usually occurs when a team has both an elite goaltender (sustaining above-average save percentage) and highly skilled forwards (sustaining above-average shooting percentage). However, PDOs above 1030 for a full season are extremely uncommon in NHL history and almost always involve some degree of unsustainable luck. Research has shown that about two-thirds of the variation in PDO between teams is attributable to random variance rather than skill. The skill component exists but is smaller than most casual fans assume.
How should PDO be used in combination with other analytics metrics?
PDO is most powerful when used alongside possession metrics like Corsi and Fenwick percentage, as well as expected goals models. The classic analytical framework examines four scenarios: strong possession plus high PDO (genuinely good team with some luck), strong possession plus low PDO (good team due for improvement), weak possession plus high PDO (bad team overperforming due to luck), and weak possession plus low PDO (genuinely struggling team). This combined approach provides a much more accurate picture than any single metric alone. Analysts also track PDO trends over time to anticipate changes in results.
What are the limitations of using PDO for hockey analysis?
PDO has several important limitations that analysts must consider. First, it does not account for shot quality, meaning teams with legitimately better offensive or defensive systems may sustain slight deviations from 1000. Second, it treats shooting percentage and save percentage as equally volatile, but research suggests shooting percentage has a slightly larger skill component than save percentage for teams. Third, PDO can be noisy in small samples (under 20 games), making it unreliable for short-term analysis. Fourth, it does not distinguish between even-strength and special teams play unless specifically calculated that way. Finally, PDO tells you about sustainability but not about the mechanisms driving results.
References
Reviewed for accuracy by Sher, Sports Science & Nutrition Specialist · Editorial policy
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