diff --git a/samples/net/cloud/google_iot_mqtt/src/protocol.c b/samples/net/cloud/google_iot_mqtt/src/protocol.c
index 180237023f2..e9aa1462583 100644
--- a/samples/net/cloud/google_iot_mqtt/src/protocol.c
+++ b/samples/net/cloud/google_iot_mqtt/src/protocol.c
@@ -201,7 +201,7 @@ static int wait_for_input(int timeout)
 	return res;
 }
 
-#define ALIVE_TIME	(MSEC_PER_SEC * 60U)
+#define ALIVE_TIME	K_SECONDS(60)
 
 static struct mqtt_utf8 password = {
 	.utf8 = token
diff --git a/samples/net/cloud/mqtt_azure/src/main.c b/samples/net/cloud/mqtt_azure/src/main.c
index 1e7a48a4adb..09f7a51746a 100644
--- a/samples/net/cloud/mqtt_azure/src/main.c
+++ b/samples/net/cloud/mqtt_azure/src/main.c
@@ -342,7 +342,7 @@ static void publish_message(void)
 
 end:
 		k_delayed_work_submit(&pub_message,
-				      MSEC_PER_SEC * timeout_for_publish());
+				      K_SECONDS(timeout_for_publish()));
 		k_sem_take(&publish_msg, K_FOREVER);
 	}
 }
@@ -470,7 +470,7 @@ static void check_network_connection(struct k_work *work)
 	LOG_INF("waiting for DHCP to acquire addr");
 
 end:
-	k_delayed_work_submit(&check_network_conn, 3 * MSEC_PER_SEC);
+	k_delayed_work_submit(&check_network_conn, K_SECONDS(3));
 }
 #endif
 
@@ -493,7 +493,7 @@ static void l4_event_handler(struct net_mgmt_event_callback *cb,
 
 	if (mgmt_event == NET_EVENT_L4_CONNECTED) {
 		/* Wait for DHCP to be back in BOUND state */
-		k_delayed_work_submit(&check_network_conn, 3 * MSEC_PER_SEC);
+		k_delayed_work_submit(&check_network_conn, K_SECONDS(3));
 
 		return;
 	}
diff --git a/samples/net/sockets/coap_server/src/coap-server.c b/samples/net/sockets/coap_server/src/coap-server.c
index d0845ee8eb8..42f474623e0 100644
--- a/samples/net/sockets/coap_server/src/coap-server.c
+++ b/samples/net/sockets/coap_server/src/coap-server.c
@@ -995,7 +995,7 @@ static void update_counter(struct k_work *work)
 		coap_resource_notify(resource_to_notify);
 	}
 
-	k_delayed_work_submit(&observer_work, MSEC_PER_SEC * 5U);
+	k_delayed_work_submit(&observer_work, K_SECONDS(5));
 }
 
 static int create_pending_request(struct coap_packet *response,
@@ -1099,7 +1099,7 @@ static int send_notification_packet(const struct sockaddr *addr,
 		}
 	}
 
-	k_delayed_work_submit(&observer_work, MSEC_PER_SEC * 5U);
+	k_delayed_work_submit(&observer_work, K_SECONDS(5));
 
 	r = send_coap_reply(&response, addr, addr_len);