How many substitutions are allowed per set in volleyball?
FIVB allows 6 substitutions per team per set. USAV allows 15, NFHS allows 18, and NCAA allows 15 in Division I or 18 in Divisions II and III. Libero replacements never count as substitutions.
Full Explanation
Per FIVB Rule 15.5.1, each team is allowed a maximum of 6 substitutions per set. A substitute player may only enter the game in the position of the player they replace, and that same player must re-enter to replace the substitute if a re-substitution is needed. Under the 2025-27 USAV indoor rules, each team is allowed 15 substitutions per set. Under NFHS rules, each team is allowed 18 substitutions per set (NFHS Rule 10-3). Under NCAA Rule 11.3.2, each team is allowed 15 substitutions per set in Division I and 18 in Divisions II and III. Libero replacements are not counted as substitutions under any ruleset.
Rulesets covered: FIVB/USAV/NFHS/NCAA | Rule Reference: FIVB Rule 15.5.1; USAV Rule 15.6; NFHS Rule 10-3; NCAA Rule 11.3.2
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