Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Time Duration Calculator

Compute the elapsed time between two clock times (hh:mm to hh:mm), handling midnight wrap-around. Returns the duration in decimal hours.

Start hour (0–23) (h)

Start minute (min)

End hour (0–23) (h)

End minute (min)

Fill in the required fields to see your result.

Time Zones

International Meeting Time Planner

Score any proposed meeting time based on how well it falls within business hours for your organiser and two participants across different time zones. Use it to find a window that works for everyone without spreadsheet guesswork.

Proposed Meeting Time (h)

Organiser Time Zone

Participant 1 Time Zone

Participant 2 Time Zone

Business Hours Priority

Fill in the required fields to see your result.

Key differences

	Time Duration Calculator	International Meeting Time Planner
Category	Time Zones	Time Zones
Inputs required	4	5
Result	Duration (hours)	Meeting Suitability Score (%)
What it does	Compute the elapsed time between two clock times (hh:mm to hh:mm), handling midnight wrap-around. Returns the duration in decimal hours.	Score any proposed meeting time based on how well it falls within business hours for your organiser and two participants across different time zones. Use it to find a window that works for everyone without spreadsheet guesswork.