Time Zone Calculator
Convert time between time zones
About the Time Zone Calculator
Scheduling across time zones is where good plans fall apart — a call set for "3 PM" means little without knowing whose 3 PM. This calculator converts a date and time from one zone to another and shows the exact offset, and it can line up several cities at once.
Remote teams use it to find a meeting time that works across continents, travelers use it to know what time it is back home, and anyone coordinating a livestream or call uses it to avoid the classic off-by-an-hour mistake. It covers twelve major world zones and stays accurate through daylight saving changes by using your browser's built-in time-zone data.
How to Use the Time Zone Calculator
- Set the date and time you want to convert.
- Choose the "from" time zone and the "to" time zone.
- Read the converted time and the offset in hours between the two zones.
- Add more cities to compare several zones against the same moment at once.
Why Use ToolForge’s Time Zone Calculator
- It is daylight-saving aware, using your browser's native time-zone database rather than fixed offsets that go stale when clocks change.
- It can compare multiple cities against one moment, which is what you actually need to schedule across a team.
- It shows the precise hour offset between zones alongside the converted time.
- It runs entirely in your browser with no network calls or account.
Frequently Asked Questions
Does this account for daylight saving time?
Yes. It uses your browser's built-in time-zone information, which knows each region's daylight-saving rules, so conversions stay correct whether or not the cities involved are currently observing summer time.
Which time zones are supported?
It covers twelve major zones spanning the Americas, Europe, Asia, the Middle East, and Oceania — including New York, London, Paris, Tokyo, Shanghai, Dubai, Sydney, and Auckland — enough to coordinate most international schedules.
Why is the offset between two cities not a whole number sometimes?
Some regions use half-hour or 45-minute offsets, and daylight-saving transitions can shift the gap between two cities. The calculator reports the actual offset for the date you choose, so it reflects these real-world quirks.
Why set a specific date rather than just convert "now"?
Because the offset between two cities can change on different dates as each enters or leaves daylight saving at different times. Choosing the actual date of your meeting or trip ensures the conversion is correct for that day, not just for today.
