How do I schedule a job every 20 minutes?

Use the cron expression */20 * * * *. You can set this in crontab on Linux, or use a service like CronJobPro to schedule HTTP requests with this expression.

Interval Schedules

Cron Job Every 20 Minutes – Expression & Examples

The */20 step value triggers at minutes 0, 20, and 40 of every hour — 3 executions per hour.

Cron Expression

*/20 * * * *

*/20

Minute

(0-59)

Hour

(0-23)

Day of Month

(1-31)

Month

(1-12)

Day of Week

(0-6)

How It Works

The */20 step value triggers at minutes 0, 20, and 40 of every hour — 3 executions per hour.

Common Use Cases

Temperature sensor readings
Shipping status updates
Database cleanup tasks

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Frequently Asked Questions

What does `/20 * * *` mean in cron?

The */20 step value triggers at minutes 0, 20, and 40 of every hour — 3 executions per hour.

How do I use this cron expression?

On Linux/macOS, edit your crontab with crontab -e and add:
*/20 * * * * /path/to/your/script.sh
Or use CronJobPro to schedule HTTP requests with this expression — no server required.

What timezone does cron use?

By default, cron uses the system timezone. CronJobPro lets you set a specific timezone per job, so your schedules are predictable regardless of server location.