⏰Cron Schedules

Every 30 Minutes

Run twice per hour at :00 and :30 minutes.

Pattern

*/30 * * * *

Explanation

Runs at the top and bottom of each hour. Moderate frequency for regular tasks.

Examples

Cron Expression

Output

*/30 * * * *

Alternative

Output

0,30 * * * *

Next Runs

Output

10:00, 10:30, 11:00, 11:30...

Code Examples

Crontab

# Method 1: Using */30
*/30 * * * * /path/to/script.sh

# Method 2: Explicit times (more compatible)
0,30 * * * * /path/to/script.sh

# Both run at :00 and :30 of every hour

Try it Now

Open in Cron Helper

💡 Tips

Good compromise between frequent and efficient
Use for API polling with rate limits
Consider 0,30 syntax for better compatibility
Perfect for cache updates

⚠️ Common Pitfalls

Some old cron versions don't support */30
Not ideal if you need hourly on-the-hour only
May still be too frequent for heavy operations