diff --git a/src/main/java/com/example/wini/domain/member/dto/common/ReservedTimeInfo.java b/src/main/java/com/example/wini/domain/member/dto/common/ReservedTimeInfo.java
index 8e0a9c6a..b3ffde6b 100644
--- a/src/main/java/com/example/wini/domain/member/dto/common/ReservedTimeInfo.java
+++ b/src/main/java/com/example/wini/domain/member/dto/common/ReservedTimeInfo.java
@@ -1,9 +1,14 @@
 package com.example.wini.domain.member.dto.common;
 
+import static com.example.wini.global.common.constant.StatusReserveTimeConstants.INDEFINITE_HOUR;
+import static com.example.wini.global.common.constant.StatusReserveTimeConstants.INDEFINITE_MINUTE;
+import static com.example.wini.global.common.constant.StatusReserveTimeConstants.INDEFINITE_SECONDS;
+import static com.example.wini.global.common.constant.StatusReserveTimeConstants.SECONDS_PER_HOUR;
+import static com.example.wini.global.common.constant.StatusReserveTimeConstants.SECONDS_PER_MINUTE;
+
 import jakarta.validation.constraints.Max;
 import jakarta.validation.constraints.Min;
 import jakarta.validation.constraints.NotNull;
-import java.time.Duration;
 
 public record ReservedTimeInfo(
         @NotNull @Min(value = -1) @Max(value = 12) Long hour, @NotNull @Min(value = -1) @Max(value = 59) Long minute) {
@@ -11,11 +16,10 @@ public static ReservedTimeInfo of(long hour, long minute) {
         return new ReservedTimeInfo(hour, minute);
     }
 
-    public Duration toDuration() {
-        if (this.hour == -1 && this.minute == -1) {
-            return Duration.ofDays(365L * 100);
+    public long toSeconds() {
+        if (this.hour == INDEFINITE_HOUR && this.minute == INDEFINITE_MINUTE) {
+            return INDEFINITE_SECONDS;
         }
-
-        return Duration.ofHours(this.hour).plusMinutes(this.minute);
+        return this.hour * SECONDS_PER_HOUR + this.minute * SECONDS_PER_MINUTE;
     }
 }
diff --git a/src/main/java/com/example/wini/domain/member/service/MemberService.java b/src/main/java/com/example/wini/domain/member/service/MemberService.java
index f2882d46..c3b32f8d 100644
--- a/src/main/java/com/example/wini/domain/member/service/MemberService.java
+++ b/src/main/java/com/example/wini/domain/member/service/MemberService.java
@@ -1,5 +1,8 @@
 package com.example.wini.domain.member.service;
 
+import static com.example.wini.global.common.constant.StatusReserveTimeConstants.INDEFINITE_HOUR;
+import static com.example.wini.global.common.constant.StatusReserveTimeConstants.INDEFINITE_MINUTE;
+import static com.example.wini.global.common.constant.StatusReserveTimeConstants.INDEFINITE_SECONDS;
 import static com.example.wini.global.error.exception.ErrorCode.MATE_NOT_FOUND;
 import static com.example.wini.global.error.exception.ErrorCode.STATUS_NOT_FOUND;
 
@@ -72,6 +75,10 @@ private boolean isStatusValid(Member member) {
     }
 
     private ReservedTimeInfo createReservedTimeInfo(long durationSeconds) {
+        if (durationSeconds == INDEFINITE_SECONDS) {
+            return ReservedTimeInfo.of(INDEFINITE_HOUR, INDEFINITE_MINUTE);
+        }
+
         Duration duration = Duration.ofSeconds(durationSeconds);
         return ReservedTimeInfo.of(duration.toHours(), duration.toMinutes() % 60);
     }
@@ -83,8 +90,7 @@ public MemberStatusResponse updateStatus(MemberStatusUpdateRequest request) {
         Status status =
                 statusRepository.findById(request.statusId()).orElseThrow(() -> new CustomException(STATUS_NOT_FOUND));
 
-        Duration statusDuration = request.reservedTimeInfo().toDuration();
-        Long statusDurationSeconds = statusDuration.getSeconds();
+        Long statusDurationSeconds = request.reservedTimeInfo().toSeconds();
 
         member.updateStatus(status, request.startedAt(), statusDurationSeconds);
         notifyRoommateOfStatusUpdate(member.getId());
diff --git a/src/main/java/com/example/wini/global/common/constant/StatusReserveTimeConstants.java b/src/main/java/com/example/wini/global/common/constant/StatusReserveTimeConstants.java
new file mode 100644
index 00000000..4e5fb748
--- /dev/null
+++ b/src/main/java/com/example/wini/global/common/constant/StatusReserveTimeConstants.java
@@ -0,0 +1,13 @@
+package com.example.wini.global.common.constant;
+
+public class StatusReserveTimeConstants {
+
+    public static final int SECONDS_PER_HOUR = 3600;
+    public static final int SECONDS_PER_MINUTE = 60;
+
+    public static final long INDEFINITE_SECONDS = 365L * 100 * 24 * 60 * 60;
+    public static final long INDEFINITE_HOUR = -1L;
+    public static final long INDEFINITE_MINUTE = -1L;
+
+    private StatusReserveTimeConstants() {}
+}