GMT/UTC Offset Calculator

Convert a time between two plain UTC offsets (like UTC−5 or UTC+5:30) without needing to look up a specific city or time zone name.

Not every conversation about time zones uses city names or named zones like "Eastern Time" — sometimes you're working with a plain numeric offset, like "we're UTC+5:30" or "the server logs are in UTC-8," especially in technical contexts like server configuration, API documentation, or international shipping paperwork that specify a raw offset rather than a human-readable zone name.

A named time zone converter is the right tool when you're thinking in terms of places — "what time is it in Tokyo" — but it's the wrong tool when you're thinking in terms of pure numbers and don't want to hunt for which city happens to share that offset, or worse, guess wrong and pick a city that observes Daylight Saving Time when you actually meant a fixed offset. This tool skips the city-lookup step entirely and works directly with the numbers.

Enter a time along with your current UTC offset and a target UTC offset — including half-hour and quarter-hour offsets like India's +5:30 or Nepal's +5:45 — and it calculates the resulting time, flagging clearly if the conversion crosses into the next or previous day. It's the more direct tool for anyone who already knows the offset they're working with and just needs the arithmetic done correctly.

1. Enter the time and your current UTC offset.
2. Enter the target UTC offset.
3. Press Convert to see the resulting time, including a day-shift note if it crosses midnight.