diff --git a/app/db/models/calendar/findTournamentTeamMemberCountsByEventId.sql b/app/db/models/calendar/findTournamentTeamMemberCountsByEventId.sql
new file mode 100644
index 000000000..8484305ff
--- /dev/null
+++ b/app/db/models/calendar/findTournamentTeamMemberCountsByEventId.sql
@@ -0,0 +1,9 @@
+select
+  count(*) as "memberCount"
+from
+  "TournamentTeam"
+  left join "TournamentTeamMember" on "TournamentTeamMember"."tournamentTeamId" = "TournamentTeam"."id"
+where
+  "TournamentTeam"."tournamentId" = @tournamentId
+group by
+  "TournamentTeam"."id";
diff --git a/app/db/models/calendar/queries.server.ts b/app/db/models/calendar/queries.server.ts
index 8300dae01..aed16ff69 100644
--- a/app/db/models/calendar/queries.server.ts
+++ b/app/db/models/calendar/queries.server.ts
@@ -42,6 +42,8 @@ import findTieBreakerMapPoolByEventIdSql from "./findTieBreakerMapPoolByEventId.
 import deleteByIdSql from "./deleteById.sql";
 import createTournamentSql from "./createTournament.sql";
 import deleteTournamentByIdSql from "./deleteTournamentById.sql";
+import findTournamentTeamMemberCountsByEventIdSql from "./findTournamentTeamMemberCountsByEventId.sql";
+import { sumArray } from "~/utils/number";
 
 const createStm = sql.prepare(createSql);
 const updateStm = sql.prepare(updateSql);
@@ -355,6 +357,30 @@ function addTagArray<
   return { ...row, tags };
 }
 
+const findTournamentTeamMemberCountsByEventIdStm = sql.prepare(
+  findTournamentTeamMemberCountsByEventIdSql
+);
+
+function addParticipantsCounts<
+  T extends { tournamentId: CalendarEvent["tournamentId"] }
+>(arg: T) {
+  if (!arg.tournamentId) return arg;
+
+  const counts = findTournamentTeamMemberCountsByEventIdStm.all({
+    tournamentId: arg.tournamentId,
+  }) as Array<{
+    memberCount: number;
+  }>;
+
+  return {
+    ...arg,
+    participantCounts: {
+      teams: counts.length,
+      players: sumArray(counts.map((c) => c.memberCount)),
+    },
+  };
+}
+
 export function findAllBetweenTwoTimestamps({
   startTime,
   endTime,
@@ -374,10 +400,12 @@ export function findAllBetweenTwoTimestamps({
         eventDateId: CalendarEventDate["id"];
       } & Pick<User, "discordName" | "discordDiscriminator"> & {
         nthAppearance: number;
-      } & { hasBadge: number }
+      } & { hasBadge: number } & {
+        participantCounts?: { teams: number; players: number };
+      }
   >;
 
-  return rows.map(addTagArray).map(addBadges);
+  return rows.map(addTagArray).map(addBadges).map(addParticipantsCounts);
 }
 
 const findByIdStm = sql.prepare(findByIdSql);
diff --git a/app/features/tournament/queries/participantTwitchUsersByTournamentId.server.ts b/app/features/tournament/queries/participantTwitchUsersByTournamentId.server.ts
index 3b2c74774..a6efb5994 100644
--- a/app/features/tournament/queries/participantTwitchUsersByTournamentId.server.ts
+++ b/app/features/tournament/queries/participantTwitchUsersByTournamentId.server.ts
@@ -8,7 +8,9 @@ const stm = sql.prepare(/* sql */ `
   from "User"
   left join "TournamentTeamMember" on "TournamentTeamMember"."userId" = "User"."id"
   left join "TournamentTeam" on "TournamentTeam"."id" = "TournamentTeamMember"."tournamentTeamId"
+  left join "TournamentTeamCheckIn" on "TournamentTeamCheckIn"."tournamentTeamId" = "TournamentTeam"."id"
   where "TournamentTeam"."tournamentId" = @tournamentId
+    and "TournamentTeamCheckIn"."checkedInAt" is not null
     and "User"."twitch" is not null
 `);
 
diff --git a/app/routes/calendar/index.tsx b/app/routes/calendar/index.tsx
index 96e9d782b..78706c2e3 100644
--- a/app/routes/calendar/index.tsx
+++ b/app/routes/calendar/index.tsx
@@ -41,6 +41,7 @@ import {
 import { actualNumber } from "~/utils/zod";
 import { Tags } from "./components/Tags";
 import { Divider } from "~/components/Divider";
+import { UsersIcon } from "~/components/icons/Users";
 
 export const links: LinksFunction = () => {
   return [{ rel: "stylesheet", href: styles }];
@@ -403,24 +404,39 @@ function EventsList({
                         </div>
                       </div>
                       <div className="stack xs">
-                        <Link
-                          to={
-                            calendarEvent.tournamentId
-                              ? tournamentPage(calendarEvent.tournamentId)
-                              : String(calendarEvent.eventId)
-                          }
-                        >
-                          <h2 className="calendar__event__title">
-                            {calendarEvent.name}{" "}
-                            {calendarEvent.nthAppearance > 1 ? (
-                              <span className="calendar__event__day">
-                                {t("day", {
-                                  number: calendarEvent.nthAppearance,
-                                })}
-                              </span>
-                            ) : null}
-                          </h2>
-                        </Link>
+                        <div>
+                          <Link
+                            to={
+                              calendarEvent.tournamentId
+                                ? tournamentPage(calendarEvent.tournamentId)
+                                : String(calendarEvent.eventId)
+                            }
+                          >
+                            <h2 className="calendar__event__title">
+                              {calendarEvent.name}{" "}
+                              {calendarEvent.nthAppearance > 1 ? (
+                                <span className="calendar__event__day">
+                                  {t("day", {
+                                    number: calendarEvent.nthAppearance,
+                                  })}
+                                </span>
+                              ) : null}
+                            </h2>
+                          </Link>
+                          {calendarEvent.participantCounts &&
+                          calendarEvent.participantCounts.teams > 0 ? (
+                            <div className="calendar__event__participant-counts">
+                              <UsersIcon />{" "}
+                              {t("count.teams", {
+                                count: calendarEvent.participantCounts.teams,
+                              })}{" "}
+                              /{" "}
+                              {t("count.players", {
+                                count: calendarEvent.participantCounts.players,
+                              })}
+                            </div>
+                          ) : null}
+                        </div>
                         <Tags
                           tags={calendarEvent.tags}
                           badges={calendarEvent.badgePrizes}
diff --git a/app/styles/calendar.css b/app/styles/calendar.css
index 44f21369b..c8692704e 100644
--- a/app/styles/calendar.css
+++ b/app/styles/calendar.css
@@ -155,6 +155,20 @@
   color: var(--text-lighter);
 }
 
+.calendar__event__participant-counts {
+  display: flex;
+  align-items: center;
+  color: var(--text-lighter);
+  font-size: var(--fonts-xs);
+  gap: var(--s-2);
+  margin-block-end: var(--s-1);
+}
+
+.calendar__event__participant-counts > svg {
+  width: 1rem;
+  margin-block-end: 1px;
+}
+
 .calendar__event__bottom-info-container {
   display: flex;
   align-items: center;
diff --git a/public/locales/en/calendar.json b/public/locales/en/calendar.json
index 31a00e54b..5ef883dde 100644
--- a/public/locales/en/calendar.json
+++ b/public/locales/en/calendar.json
@@ -14,6 +14,10 @@
   "createMapList": "Create map list",
   "from": "From {{author}}",
   "pastEvents.dividerText": "Past events",
+  "count.teams_one": "{{count}} team",
+  "count.players_one": "{{count}} player",
+  "count.teams_other": "{{count}} teams",
+  "count.players_other": "{{count}} players",
 
   "forms.dates": "Dates",
   "forms.bracketUrl": "Bracket URL",