What is the cron expression for every 15 minutes?

The expression is */15 * * * *. It runs at :00, :15, :30, and :45 every hour — 4 times per hour, 96 times per day.

What is */15 in cron?

The */15 syntax is a step value meaning "every 15th minute starting from 0." In the minute field, it produces 0, 15, 30, 45.

Cron Every 15 Minutes

*/15 * * * *

Every 15 minutes

Next 10 Executions

Times shown in UTC

Mon, May 18, 202608:15
Mon, May 18, 202608:30
Mon, May 18, 202608:45
Mon, May 18, 202609:00
Mon, May 18, 202609:15
Mon, May 18, 202609:30
Mon, May 18, 202609:45
Mon, May 18, 202610:00
Mon, May 18, 202610:15
Mon, May 18, 202610:30

Field Breakdown

*/15

Minute

Every 15 minutes

*

Hour

Every hour

*

Day of Month

Every day

*

Month

Every month

*

Day of Week

Every day of week

About This Schedule

The cron expression */15 * * * * runs a job every 15 minutes — at :00, :15, :30, and :45 each hour. That's 96 executions per day.

Every 15 minutes is one of the most common cron intervals in production systems. It's the default polling interval for many monitoring tools, CI/CD pipelines, and data ingestion jobs. The quarter-hour cadence aligns naturally with human time perception, making it easy to reason about when jobs last ran.

This is also the minimum free-tier cron interval on many platforms like Vercel (Hobby plan). If you need to run more frequently, you may need to upgrade your plan or use a different scheduling approach.