Cron expression: Every 15 minutes
Runs four times an hour, every 15 minutes.
*/15 * * * *Standard 5-field cron format — works with crontab, GitHub Actions, Vercel Cron, Kubernetes CronJobs, and most schedulers.
What does */15 * * * * mean?
The cron expression */15 * * * * runs every 15 minutes. A standard cron expression has five fields — minute hour day-of-month month day-of-week — and here is what each field does:
| Field | Value | Meaning |
|---|---|---|
| Minute | */15 | Every 15 minutes |
| Hour | * | Every hour |
| Day of month | * | Every day |
| Month | * | Every month |
| Day of week | * | Every day of the week |
How to use it
To run a job on this schedule with Unix cron, open your crontab with crontab -e and add a line that combines the expression with your command:
*/15 * * * * /path/to/your-command
The same expression works in most modern schedulers — paste it into a GitHub Actions schedule trigger, a Vercel Cron job, a Kubernetes CronJob schedule, or your cloud task runner.
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More cron examples
- Every minute —
* * * * * - Every 5 minutes —
*/5 * * * * - Every 10 minutes —
*/10 * * * * - Every 30 minutes —
*/30 * * * * - Every 2 minutes —
*/2 * * * * - Every 20 minutes —
*/20 * * * *
Frequently asked questions
What is the cron expression for "every 15 minutes"?
The cron expression for every 15 minutes is */15 * * * *. It uses the standard 5-field format: minute, hour, day-of-month, month, and day-of-week.
How do I schedule a job to run every 15 minutes?
Add the line "*/15 * * * * /path/to/your-command" to your crontab (run "crontab -e"), or paste */15 * * * * into the schedule field of your CI/CD pipeline, serverless scheduler, or Kubernetes CronJob.
Does this cron expression use a timezone?
No. Cron expressions have no timezone of their own — they run in the timezone of the server or scheduler executing them. Set the timezone in your scheduler's configuration if you need a specific one.