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Time Zone Calculator

Convert a time between zones and find a slot that works for everyone.

Calculators Reviews Free · no sign-up

Converted times

The whole day, side by side

Shaded hours are 09:00–18:00 locally — a shared column is a workable meeting slot.

Compare zones

Add the places you work with.

    Quick Tool Overview

    The Time Zone Calculator converts a date and time from one zone into as many others as you need, side by side, with daylight saving applied automatically. A comparison strip shows a full day across every selected zone, shading the hours inside normal working time.

    What it does
    Converts times between zones and finds a workable meeting slot
    You give it
    A source date and time and the zones you care about
    You get back
    The time in each zone plus a working-hours day strip
    Best for
    Remote teams, international calls, travel and live events
    Calculators Free, unlimited use No sign-up Runs in your browser

    About the Time Zone Calculator

    Pick a date and time in one zone and see it in as many others as you need, side by side. Daylight saving is applied automatically from your browser's own time zone database, so the answer stays correct across the changeover dates that catch people out.

    A comparison strip shows a full day across every selected zone at once, shading the hours that fall inside normal working time in each one. That turns scheduling across three continents from a mental arithmetic problem into something you can see, including the cases where no shared working hour exists and somebody has to take the call early or late.

    Key features of the Time Zone Calculator

    Daylight saving applied automatically

    Rules come from your browser's own time zone database, so answers stay correct across the changeover dates that catch people out.

    Working-hours day strip

    A full day across every zone with working hours shaded, which turns three-continent scheduling into something you can see.

    Many zones at once

    Add as many as your team spans rather than converting them one pair at a time.

    No-overlap cases made visible

    When no shared working hour exists, the strip shows it, so somebody knowingly takes the call early or late.

    Any date

    Convert for a future date and the correct daylight saving state for that date is used.

    How to use the Time Zone Calculator

    1. 1

      Set the source time

      Choose a date, a time and the zone it is in. It defaults to now in your own zone.

    2. 2

      Add the zones you care about

      Pick any number of cities or regions to compare against.

    3. 3

      Scan the day strip

      Working hours are shaded in each zone, so a slot that suits everyone is easy to spot.

    Frequently asked questions

    Yes. It uses your browser's built-in time zone data, so daylight saving is applied automatically for the specific date you choose rather than assuming a fixed offset.

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