Add cities or time zones
Choose the locations of your team members.
Working Hours Overlap Calculator
Find overlapping working hours across time zones. Add your team's cities, compare local business hours, and choose a meeting time that is fair for everyone.
Calculate working hours overlap across time zones
Set working hours
Use default business hours or adjust them for each location.
Compare overlap
See which time slots are inside working hours, partially acceptable, or outside normal hours.
Choose a fair time
Pick a time that gives your team the best overlap window.
Find overlap windows faster
Compare business hours
See local work hours for every selected location.
Find overlap windows
Highlight the times that work for most or all team members.
Choose fair meeting times
Avoid making the same person join very early or very late every week.
What is working hours overlap?
Working hours overlap is the time window when people in different locations are all available during their normal business hours.
For example, if one team member works in New York and another works in London, their calendars may only overlap for a few hours each day. If you add Tokyo, Sydney, or Latin America to the same meeting, the overlap window can become much smaller.
A working hours overlap calculator helps you find that shared window without manually converting each time zone.
How the working hours overlap calculator works
The calculator compares local business hours across multiple time zones.
Add locations
Add the cities or time zones of your team members.
Choose a date
Choose the meeting date so daylight saving time changes are calculated correctly.
Set work hours
Use default business hours, such as 9:00 AM to 5:00 PM, or adjust them for each location.
Compare overlap
The calculator converts each location into local time and highlights the overlapping hours.
Pick a meeting time
Choose a fair overlap window and share the selected time with your team.
Find the best overlap window for meetings
A basic time zone converter tells you what time it is in another location. But for meetings, that is not enough.
You need to know whether the time is actually reasonable for everyone. A call at 10:00 AM Pacific Time may be perfect for California, late afternoon in Europe, and already night in Asia.
This calculator helps you find the best overlap window, so you can schedule meetings without forcing the same person or region to join too early or too late every time.
Example: US, Europe, and Asia working hours
Imagine a team with people in San Francisco, London, and Tokyo.
A meeting that starts at 9:00 AM in San Francisco may be late afternoon in London and after midnight in Tokyo. A meeting that works for London and Tokyo may be very early for San Francisco.
When there is no perfect overlap, the best option is usually the least unfair one. The calculator helps you compare the trade-offs and choose a time that works for the largest part of the team.
San Francisco
9 AM5 PM
London
5 PM1 AM
Tokyo
1 AM9 AM
Best overlap: limitedGood for: San Francisco + LondonHard for: Tokyo
Built for remote teams
Remote teams often work across several countries and time zones. Without a clear overlap window, meetings can become unfair, inconsistent, or difficult to attend.
Use this calculator for weekly standups, product reviews, sales calls, interviews, customer demos, and international conference calls. For recurring meetings, you can rotate inconvenient times so the same team members do not always take the worst slot.
Daylight saving time handled automatically
Time differences can change during the year, especially when daylight saving time starts or ends. The calculator uses the selected date to compare working hours, so your meeting time is based on the correct local time for each location.
This helps you plan calls weeks or months ahead without manually checking whether a region has changed clocks.
Use the full meeting time zone planner
After finding the best working hours overlap, you can choose a meeting time and share it with your team.
The meeting time zone planner lets you compare local times, select a time slot, copy the proposed meeting time, and share a link so everyone can see the time in their own location.
Open Meeting Time Zone PlannerFAQ
What is a working hours overlap calculator?
A working hours overlap calculator helps you find the time window when people in different time zones are available during their normal business hours. It compares local work hours and shows when a meeting is reasonable for everyone.
How do I find overlapping working hours across time zones?
Add each city or time zone, set the working hours for each location, and choose a date. The calculator converts the times locally and highlights the overlap window.
What is a good overlap window for remote teams?
A good overlap window is a time period that falls inside normal working hours for most or all team members. For global teams, a perfect overlap may not exist, so the fairest option may be the least inconvenient time.
Does daylight saving time affect working hours overlap?
Yes. Daylight saving time can change the time difference between locations. That is why overlap should be calculated for the selected date, not only from the current time difference.
Can I compare more than two time zones?
Yes. You can compare multiple time zones to find a shared meeting window across several locations, such as the United States, Europe, Asia, and Latin America.
Is this different from a time zone converter?
Yes. A time zone converter shows what time it is in another location. A working hours overlap calculator shows which time slots are actually usable for meetings during normal business hours.