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Cron Expression Parser

Parse and explain cron job schedule expressions

Reviewed: AnyCalc Editorial|2026-07-19|Editorial policy|About

What this calculator does

Cron expressions define schedules for recurring tasks in Unix-based systems, CI/CD pipelines, cloud functions, and job schedulers like Kubernetes CronJobs. This parser takes a cron expression (e.g., "0 */6 * * 1-5") and translates it into plain English, displays the next scheduled execution times, and validates the syntax. It supports the standard five-field format (minute, hour, day of month, month, day of week) as well as extended six-field formats with seconds. Developers use this tool to verify that cron schedules fire at the intended times before deploying them, avoiding costly mistakes like accidentally running a heavy batch job every minute instead of every hour.

How to use

  1. 01
    Enter a cron expression
    Type or paste your cron expression into the input field.
  2. 02
    Read the description
    See a human-readable explanation of when the job will run.
  3. 03
    Check next runs
    Review the upcoming execution times to verify your schedule.

Cron Expression Parser FAQ

What does each field in a cron expression mean?▾
The five fields are: minute (0-59), hour (0-23), day of month (1-31), month (1-12), and day of week (0-7, where 0 and 7 are Sunday). Special characters include * (any), , (list), - (range), and / (step). For example, */15 in the minute field means every 15 minutes.
How do I schedule a cron job to run every weekday at 9 AM?▾
Use the expression "0 9 * * 1-5". This sets minute to 0, hour to 9, any day of month, any month, and days 1 through 5 (Monday through Friday).
What is the difference between 5-field and 6-field cron expressions?▾
The standard 5-field format covers minute through day-of-week. Some systems (like Spring Scheduler and Quartz) add a sixth field for seconds at the beginning. Always check which format your scheduler expects.

Interpret carefully

Outputs are decision-support estimates, not a substitute for professional judgment.

  • Treating Cron Expression Parser output as a final professional diagnosis, quote, or legal determination
  • Entering approximate values when the result is sensitive to units or precision
  • Applying the FAQ answer (“What does each field in a cron expression mean?”) to a special case without checking assumptions

Next steps

  1. Double-check inputs against your source documents (labs, statements, specs, or notes).
  2. Confirm the method below matches your use case before you act on the number.
  3. For medical, financial, or production decisions, verify with a qualified professional.

Disclaimer: Results are informational only and do not constitute medical, financial, legal, or professional advice. Report issues: sublimernj@gmail.com

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