Cron Expression for Every 30 Minutes
The cron expression for every 30 minutes is */30 * * * *, or 0,30 * * * * for the same result. Compare both forms and test your own schedule.
Part of the free Cron Expression Generator. Runs in your browser — nothing is uploaded.
Cron Expression for Every 30 Minutes
Two expressions give the same half-hourly schedule: */30 uses a step and 0,30 uses a list. Pick whichever is clearer for your team and verify it below.
Worked example: Every 30 minutes
Cron expression
*/30 * * * *
In plain English
Every 30 minutes
Practical tip
If you need an offset, such as :10 and :40, use a list: 10,40 * * * *. Steps always start at minute 0.
How to use this Cron Generator
- 1Use the live tool above — it runs entirely in your browser and never uploads your data.
- 2Paste the sample from the worked example, or use your own input.
- 3Copy the result, then adapt the same steps in your editor, script, or pipeline.
Cron Expression for Every 30 Minutes FAQs
Is */30 the same as 0,30?
Yes for the minute field: both fire at minute 0 and minute 30 of every hour.
How do I run every 90 minutes?
Cron cannot express intervals that do not divide the hour or day evenly. Run every 30 minutes and skip runs in code, or use a systemd timer.
More Cron Generator pages
- Cron Expression for Every 5 MinutesThe cron expression for every 5 minutes is */5 * * * *. See what it means, test variations and copy it into crontab, Kubernetes or GitHub Actions.
- Cron Expression to Run Every HourThe cron expression to run every hour is 0 * * * *. Learn what it means, how it differs from @hourly and how to change the minute.
- Cron Expression for Daily at MidnightThe cron expression for every day at midnight is 0 0 * * *. See what it means, how timezones affect it and how to schedule other daily times.
- Cron Expression for Every Monday at 9 AMThe cron expression for every Monday at 9 AM is 0 9 * * 1. Understand the day-of-week field and adapt it for other weekdays and times.
- Cron Expression for Weekdays During Business HoursSchedule a cron job every 30 minutes from 9 AM to 5 PM, Monday to Friday, with */30 9-17 * * 1-5. See how ranges and steps combine.
- Cron Expression for the First Day of Every MonthThe cron expression for the first day of the month is 0 0 1 * *. Use it for monthly billing, reports and cleanup, and learn how to handle the last day.
- GitHub Actions Cron ScheduleWrite a GitHub Actions schedule trigger with cron syntax. Build and verify expressions for daily and hourly workflows. Remember: GitHub runs them in UTC.
- Kubernetes CronJob Schedule SyntaxWrite the schedule field of a Kubernetes CronJob. Build and verify a cron expression such as a weekly backup, then paste it into your manifest.
- Cron Expression for Every QuarterSchedule a cron job once a quarter with 0 0 1 1,4,7,10 *. See how month lists work and when quarterly reports will run.