When the Time Duration Calculator seems to misbehave, the cause is usually one of two things: something stopped the tool from running, or it ran but the result is not usable. This guide starts with the fastest checks, then walks through the common problems and exact fixes.
Quick Checks First
- Refresh the page - a stalled session is the most common cause of nothing happening.
- Confirm the input is not empty and actually contains what you meant to submit.
- Try the smallest possible input; if that works, the issue is size, not the tool.
- Turn off browser extensions that block scripts, then reload and test again.
- Update or switch browsers if the problem repeats across sessions.
Common Problems and How to Fix Them
The duration is wrong around midnight.
Enter the full dates with the times - overnight spans cross a calendar day and need both.
Afternoon times read as morning.
Confirm the am/pm toggle; 2:30 pm entered as am shortens the span by twelve hours.
Timesheet wants decimal hours.
Use the decimal hours readout - 7 hours 30 minutes shows as 7.5 for payroll forms.
My team is in another time zone.
Convert both timestamps to one zone first; the tool measures the clock as entered.
Seconds matter for my workout splits.
The seconds field is included - enter start and end with second precision for lap math.
Does it keep a log of my times?
No - the calculation runs in your browser with nothing saved.
When It Works but the Output Is Poor
If the tool runs fine but the result misses, the problem is almost always the brief, not the software:
- Ignoring midnight rollover
- Entering 12-hour times without am or pm
- Expecting rounded quarter hours
- Mixing time zones across locations
How to Stop It Happening Next Time
- Keep a saved prompt template for every task you repeat.
- Change one setting per generation so causes stay obvious.
- Run a two-minute sanity test with known input after any update.
- Note every failure and its fix; a short troubleshooting log pays for itself.
Still Stuck?
Reproduce the problem with the smallest possible input and note the exact steps that triggered it. A one-line description of what you did, what you expected and what happened is enough to get a precise answer from support or a colleague.
Frequently Asked Questions
How is duration calculated?
By subtracting the start timestamp from the end timestamp and expressing the gap in hours, minutes and seconds.
Does it handle overnight shifts?
Yes - enter both full dates and the tool counts across midnight correctly.
What are decimal hours?
Total hours as a single decimal - 90 minutes becomes 1.5 hours - handy for timesheets and pay.
Is my data stored?
No - everything runs in your browser.
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