Although　the　quantity　of　pornography　use　(QPU,　i.e.,　frequency/time　spent　on　pornography　use)　has　been　positively　associated　with　the　severity　of　pornography　use　(i.e.,　problematic　pornography　use,　PPU),　the　magnitudes　of　relationships　have　varied　across　studies.　This　meta-analysis　aimed　to　assess　the　overall　relationships　and　identify　potential　moderating　variables　to　explain　the　variation　in　these　associations　between　QPU　and　PPU.　We　performed　a　literature　search　for　all　published　and　unpublished　studies　from　1995　to　2020　in　major　online　scientific　databases　up　until　December　2020.　Sixty-one　studies　were　identified　with　82　independent　samples　involving　74,880　participants.　Results　indicated　that　there　was　a　positive,　moderate　relationship　between　QPU　and　PPU　(r　=　0.34,　p　＜　.001).　The　strength　of　relationship　significantly　varied　across　measures　of　PPU　based　on　different　theoretical　frameworks,　indicators　of　QPU,　and　sexual　cultural　contexts　(conservative　vs.　permissive　sexual　values).　Frequency　was　a　more　robust　quantitative　indicator　of　PPU　than　time　spent　on　pornography　use.　In　conservative　countries,　QPU　showed　more　robust　association　with　self-perceived　PPU.　Future　studies　are　encouraged　to　select　the　measurement　of　PPU　according　to　research　aims　and　use　multi-item　measures　with　demonstrated　content　validity　to　assess　pornography　use.　Cross-cultural　(conservative/permissive)　comparisons　also　warrant　further　research.