Time Duration Calculator NZ
Find the exact duration between two dates and times — in days, hours, minutes and seconds.
How it works
Pick a start and an end date-and-time. The calculator returns the exact gap broken down into days, hours and minutes, and also as total hours, minutes and seconds. If the end is before the start, it shows the absolute duration.
Frequently asked questions
How do I find the duration between two times?
Enter the start and end times; the tool returns the elapsed hours, minutes and seconds, even across midnight.
Does it work across midnight?
Yes. If the end time is earlier in the day than the start, it treats the end as the next day and counts correctly.
Can I add several durations together?
Yes. You can sum multiple time spans, with minutes and seconds carried into the next unit automatically.
What is the difference between this and an hours calculator?
They overlap; a duration calculator often includes seconds and the ability to add spans, while an hours calculator focuses on the gap between two clock times.
How do I subtract one duration from another?
Enter both and subtract; for example, 4h 00m minus 1h 30m leaves 2 hours and 30 minutes.
What can I use it for?
Timing workouts, cooking, study sessions, travel and any activity where you need an accurate elapsed time.
Measuring elapsed time
A time duration calculator finds how long passes between a start and an end moment, expressed in hours, minutes and seconds. It is built to handle durations that run past midnight and to add or subtract time spans cleanly.
Worked example
From 8:15 AM to 2:45 PM is 6 hours and 30 minutes. From 11:30 PM to 1:15 AM is 1 hour and 45 minutes, because the calculator recognises the end time falls on the following day and counts across midnight.
Adding durations
Beyond two clock times, you can add durations together — useful for totalling several tasks. Three sessions of 1h 20m, 45m and 2h 10m add to 4 hours and 15 minutes, with the minutes carried into hours automatically.
This is handy for timing workouts, cooking, study blocks, travel legs or any sequence of activities where you need an accurate total without juggling 60-minute carries in your head.
Results are estimates for general guidance in New Zealand and may not reflect the latest local rates, fees or rules. Check official sources before making decisions.