9:00 AM EST to CET
- Feb 10, 2025 at 09:00 UTC-5 converts to 15:00 UTC+1
time calculator
Timezone Converter
Convert a meeting time between two UTC offsets without memorizing the difference between PST, EST, GMT, or IST.
Results
- Target year
- 2025.00
- Target month
- 2.00
- Target day
- 10.00
- Target hour
- 15.00
- Target minute
- 0.00
- Readable time
- 2025-02-10 15:00 (UTC+1)
How to use this calculator
- Enter the local date and time you have.
- Enter the source UTC offset (e.g., -5 for EST, +1 for CET, +5.5 for IST).
- Enter the destination UTC offset.
- See the converted date/time and a readable label for invites or handoffs.
Inputs explained
- Date/time
- The starting local date and time in the source timezone.
- From UTC offset
- Offset of your source timezone relative to UTC (supports half-hour offsets).
- To UTC offset
- Offset of the target timezone relative to UTC.
How it works
We treat your entry as local time in the source offset, convert it to UTC, then shift it into the destination offset.
Half-hour and quarter-hour timezones are supported by entering 5.5, -3.5, etc.
Formula
Target time = Source time − Source offset + Target offset
When to use it
- Scheduling meetings across continents without miscounting hours.
- Coordinating deployments or trading sessions in multiple regions.
- Checking travel arrival times against local timezones.
Tips & cautions
- Account for daylight saving manually by using the correct offset for the date (e.g., -4 for EDT vs -5 for EST).
- Half-hour zones like IST (+5.5) and NT (−3.5) are supported—just enter decimals.
- If you only know local offsets in hours and minutes, convert minutes to decimals (30 minutes = 0.5).
- No automatic DST rules or named timezone lookup—offsets must be entered manually.
- Assumes Gregorian calendar and UTC-based offsets only.
- Does not show multiple target zones at once; run separate conversions for each region.
Worked examples
IST to PST
- Jan 5, 2025 18:30 UTC+5.5 converts to 05:00 on the same day in UTC-8
Deep dive
This timezone converter shifts any local date/time between UTC offsets. Enter the source time and both offsets (e.g., -5 to +1) to get the converted date, time, and a readable label.
Great for remote teams, travel, and global release planning. Handle DST manually by using the correct offset for the date; half-hour offsets like +5.5 are supported.
FAQs
- Does it know daylight saving time?
- Offsets are manual so you can enter the correct value for standard or daylight time as needed.
- Can I use named timezones?
- Enter the corresponding UTC offset for now. Named timezone lookups are on the roadmap.
- Can I convert to multiple time zones at once?
- Not in one run. Enter another destination offset to get an additional conversion.
- How do I handle 30- or 45-minute offsets?
- Enter them as decimals, such as +5.5, -3.5, or +5.75.
- Does the date roll over automatically?
- Yes. If converting crosses midnight, the target date updates accordingly.
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Always confirm high-stakes meetings with participants. Daylight saving shifts vary by region.