Calculator Tools/Timezone Converter
Timezone Converter
Convert between world timezones
Source Timezone
Target Timezone
PST
Pacific Standard Time
UTC-8
21:46
2026-01-08(-1day)
GMT
Greenwich Mean Time
UTC+0
05:46
2026-01-09
JST
Japan Standard Time
UTC+9
14:46
2026-01-09
Frequently Asked Questions
No, this tool uses fixed UTC offsets for simplicity and reliability. DST rules vary by country and change over time. During DST periods, manually adjust by 1 hour, or verify the current offset for your specific timezone.
When a time conversion crosses midnight, the day changes. For example, converting 10 PM in New York to Tokyo (14 hours ahead) gives 12 PM the next day, shown as '+1 day'. This helps you understand when the day changes across timezones.
We limit to 5 timezones to keep the interface clean and usable. For most scheduling needs, comparing 5 timezones is sufficient. You can remove a timezone and add a different one if needed.
GMT (Greenwich Mean Time) and UTC (Coordinated Universal Time) are effectively the same for practical purposes - both represent the time at 0° longitude. UTC is the modern standard used by computers and aviation, while GMT is the traditional term often used in everyday contexts.
We include the most commonly used standard timezones by region. Many cities share timezones - for example, Singapore, Hong Kong, and Perth all use UTC+8. Find a timezone with the same UTC offset as your location.