How to Convert Time Zones Online for Free (2026 Guide)
A client writes "let's meet at 3 PM EST" — but you're in Karachi, and it's November, and half the world just changed their clocks. Is that 1 AM or 2 AM for you? Time zone math is the kind of thing humans get wrong all the time, which is exactly why a dedicated converter exists. Our Timezone Converter turns any date and time from one zone into another instantly — free, no signup, and everything happens in your browser.
What the timezone converter does
The tool shows the same moment expressed in two different time zones. You pick a date and time, choose a "From" zone and a "To" zone from a list of major world zones — UTC, London, Paris, Berlin, Moscow, New York, Chicago, Los Angeles, Dubai, Karachi, Kolkata, Singapore, Tokyo and Sydney — and it displays both versions side by side. One important detail to know up front: the time you type into the picker is read in your device's local time, and the tool then renders that instant in each selected zone. So for the most intuitive results, make the "From" zone match your own time zone (or simply read the "To" line, which is the answer you usually need).
Step-by-step: converting a time zone
- Open the Timezone Converter.
- Click the "Date & time" field and pick the date and time you want to convert. The default time is your current time.
- In the "From zone" dropdown, choose the zone the time belongs to. The tool preselects Europe/London — change it if needed.
- In the "To zone" dropdown, choose the zone you want the answer in. The default is Asia/Karachi.
- Press Convert. The result appears as two lines, e.g. 15 Oct 2026, 10:00 (Europe/London) = 15 Oct 2026, 14:00 (Asia/Karachi).
That's the whole workflow — about ten seconds. No accounts, no ads in the way, no data sent anywhere.
Example 1: scheduling a cross-border meeting
Say your team is split between New York and Karachi, and someone proposes 10:00 AM New York time on 20 October 2026. Open the converter, set the date to 20 Oct 2026, 10:00, "From zone" to America/New_York and "To zone" to Asia/Karachi, then hit Convert.
The tool shows that moment in both zones. In October, New York is on EDT (UTC−4) and Karachi stays at UTC+5 year-round, so 10:00 AM New York = 7:00 PM Karachi — a workable evening slot for the Karachi side. Now try the same meeting on 20 January: New York is on EST (UTC−5), so the same 10:00 AM becomes 8:00 PM in Karachi. One hour of drift, exactly the kind of thing that causes missed meetings when people do it in their heads — and exactly what the converter handles for you automatically, since it accounts for each zone's actual offset on the date you enter.
Example 2: flight arrivals and deadlines
Flight itineraries list departure and arrival in local times, which makes "how long is the layover really?" surprisingly hard. Enter the departure time with the departure city's zone as "From", and the arrival with its zone as "To". The two lines make the gap obvious. The same trick works for deadlines: a contest that closes "midnight UTC" — enter 23:59 with UTC as From and your own zone as To to see your real local cutoff.
Watch out for daylight saving time
The biggest source of time zone mistakes is daylight saving (DST). Many zones shift by an hour in March/April and October/November, so an offset you memorized in summer is wrong in winter. Because the converter looks up the actual offset for the exact date you enter, you don't have to track any of this yourself — just always enter the real date, not a generic time. A meeting converted correctly for 15 July can genuinely be an hour off if you reuse the result on 15 December; reconvert when the date changes.
Practical tips
- Always specify the date, not just the time. DST means offsets depend on the date — "3 PM London time" is ambiguous without one.
- For recurring meetings, reconvert seasonally. A weekly call set in summer may shift by an hour after a DST change.
- Use the tool before replying "yes" to a meeting. Ten seconds now beats a 1 AM surprise later.
- Pair it with your calendar. After converting, create the event with the correct local time so the invite carries a proper time zone for everyone.
Privacy and cost
Like every tool on this site, the Timezone Converter runs entirely in your browser — the conversion happens in JavaScript on your device, so your meeting times are never uploaded to any server. It's completely free with no limits and no signup.
Frequently asked questions
Which time zones are supported?
The tool covers 14 major zones: UTC, London, Paris, Berlin, Moscow, New York, Chicago, Los Angeles, Dubai, Karachi, Kolkata, Singapore, Tokyo and Sydney. These cover the vast majority of everyday conversions for meetings, travel and deadlines.
Does it handle daylight saving time?
Yes. Offsets are computed for the exact date and time you enter, so DST transitions are accounted for automatically. Always enter the real date — the offset depends on it.
Is my meeting time sent to a server?
No. All processing happens locally in your browser; nothing you enter ever leaves your device.
Try it now: Free Timezone Converter