Timezone Overlap Calculator

Find overlapping working hours between two time zones for scheduling meetings with international contacts.

Your UTC Offset (hours)

Their UTC Offset (hours)

Work Day Start Hour (0-23)

Work Day End Hour (0-23)

Formula

Time Difference = Their Offset - Your Offset; Overlap = max(0, min(Your End, Their End in Your Time) - max(Your Start, Their Start in Your Time))

How do I find overlapping work hours across time zones?

Convert both schedules to the same time zone, then find the intersection of working hours. Tools and calculators can automate this.

What is the biggest time difference possible?

The maximum time difference is 26 hours, between UTC-12 (Baker Island) and UTC+14 (Line Islands, Kiribati).

How do I handle meetings across many time zones?

Rotate meeting times to share the inconvenience, use async communication when possible, and record meetings for those who cannot attend live.

Find the best overlapping meeting time across different time zones for your team.

Free travel budget calculator. Estimate your total trip cost by entering daily expenses for hotel, food, transport, activities, and flight costs.

Estimate how many days it takes to recover from jet lag based on time zones crossed, travel direction, and personal factors.