Cron Next Run Calculator
Cron Next Run Calculator
Calculate the next N run times for a cron schedule from a chosen start time.
Processed locally in your browser. We do not store or upload your data.
InputsNext runs10 rowsIdle
Result
Ready to calculate next runs.
This calculator uses standard 5-field cron syntax in local browser time.
Flow
- Parse cron expression into allowed field sets.
- Advance minute by minute from start timestamp.
- Collect first N timestamps that satisfy schedule match.
Example
Worked example: every six hours
- 1 Input expression 0 */6 * * *.
- 2 Set start time to current local datetime.
- 3 Calculator outputs the next ten execution timestamps.
Run preview confirms 6-hour interval scheduling as expected.
How
- Enter cron expression and desired run count.
- Set start datetime for forecast baseline.
- Calculate and copy upcoming run timestamps.
Cases
- Confirm release window timing for scheduled tasks.
- Simulate cron schedule behavior from a chosen start point.
- Validate daylight and calendar edge-case expectations.
Avoid
- Using invalid field ranges such as minute 60.
- Expecting timezone conversion behavior outside local browser time.
- Comparing results with schedulers that use different cron dialect rules.
FAQ
How many future runs can I preview?
You can configure preview count and calculate multiple upcoming runs in one step.
Which timezone is used?
The calculator uses your local browser timezone.
Does this support standard 5-field cron only?
Yes, this calculator is built for standard five-field cron expressions.
Switch
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