---
title: "Time zone converter and meeting planner — free, runs in your browser"
description: "Convert a time between zones and find the overlap for a meeting. Free, no sign-up, and nothing you enter leaves your browser."
url: https://atoneplace.net/tools/timezone-converter/
site: "At One Place"
---

# Time zone converter and meeting planner

Convert a time between zones and find the overlap for a meeting.

## How it works

Converts a time between zones and shows a working-hours overlap grid for scheduling across several of them.

Offsets are resolved through your browser’s IANA timezone database rather than fixed numbers, which is what makes daylight saving correct. A fixed "UTC+1" is wrong for half the year in most of Europe, and the transition dates differ between the EU, the UK, the US and the southern hemisphere — where the seasons are inverted, so the gap between London and Sydney swings between 9 and 11 hours over the year.

India, Iran, Afghanistan, Nepal, Myanmar and parts of Australia use half-hour or 45-minute offsets. Nepal is UTC+05:45, which exists to align noon with the sun over Kathmandu.

The overlap grid assumes a 9-to-5 working day in each zone. Where there is no overlap at all — which happens routinely between the US west coast and India — it says so rather than suggesting a time nobody will accept.

> This tool runs entirely in your browser. Nothing you enter is sent to a server, logged or stored, and the page keeps working with the network disconnected.

## Common questions

### Why does the difference between two cities change during the year?

Daylight saving. The two places switch on different dates, or one does not switch at all, so the gap is not constant.

### Are all time zones whole hours?

No. India is UTC+05:30, Nepal is UTC+05:45, and parts of Australia use half-hour offsets.

## Related pages

- [Reaction time test](https://atoneplace.net/tools/reaction-time-test/)
- [Stopwatch and countdown timer](https://atoneplace.net/tools/stopwatch-timer/)
- [Click speed test](https://atoneplace.net/tools/click-speed-test/)
- [Countdown to a date](https://atoneplace.net/tools/countdown-timer/)
- [Leap year and week number](https://atoneplace.net/tools/leap-year-checker/)
- [Metronome and tone generator](https://atoneplace.net/tools/metronome-tone-generator/)
- [Reply delay timer](https://atoneplace.net/tools/reply-timer/)
- [Percentage calculator](https://atoneplace.net/tools/percentage-calculator/)
- [Loan and EMI calculator](https://atoneplace.net/tools/loan-calculator/)
- [BMI calculator](https://atoneplace.net/tools/bmi-calculator/)

## Sources

- Calculated on this page — At One Place (/about/)