Everyday calculator

Time Zone Converter, Convert Any Time Worldwide with DST

Convert any time between world time zones with automatic daylight saving time adjustments. Covers all 38 UTC offsets including half-hour zones.

Published by · Reviewed against primary-source formulas

Converted Time

–

Target time zone

Date

–

At destination

Difference

–

Hours apart

Major Cities

How CalcMesh converts between time zones

We convert a time from one zone to another using UTC offsets and Daylight Saving Time rules from the IANA Time Zone Database, the reference most operating systems rely on.

Because DST transition dates change by jurisdiction, we apply the current published rules, which we note in our methodology.

According to the Internet Assigned Numbers Authority, which maintains the global Time Zone Database, there are more than 350 named zones and offsets ranging from UTC−12:00 to UTC+14:00, all of which we support.

Time Zone Guide

Common Time Zones

Abbreviation Name UTC Offset
EST/EDTEastern (US)UTC-5 / UTC-4
CST/CDTCentral (US)UTC-6 / UTC-5
MST/MDTMountain (US)UTC-7 / UTC-6
PST/PDTPacific (US)UTC-8 / UTC-7
GMT/BSTUKUTC+0 / UTC+1
CET/CESTCentral EuropeUTC+1 / UTC+2
ISTIndiaUTC+5:30
JSTJapanUTC+9
AEST/AEDTAustralia EasternUTC+10 / UTC+11

Scheduling Tips

  • Always specify the time zone when scheduling across regions.
  • Use UTC for international meetings to avoid ambiguity.
  • Remember that DST changes happen on different dates in different countries.
  • Some regions don't observe DST at all (Arizona, Hawaii, most of Asia/Africa).

Methodology & Assumptions

This calculator implements standard formulas drawn from primary-source authorities. Values are point-in-time estimates; consult a licensed professional for high-stakes decisions. See the per-input definitions and source citations below.

How this works

Computations are deterministic and run client-side, no inputs leave your browser. Formulas are derived from standard published formulas for the calculator's domain (mortgage, taxes, energy, conversions, etc.). When the underlying agency publishes updated rates or thresholds we refresh defaults and update the page's lastmod timestamp.

Frequently Asked Questions

What is UTC?
UTC (Coordinated Universal Time) is the global time standard from which all time zones are defined as offsets. It replaced GMT (Greenwich Mean Time) as the international reference. UTC does not observe daylight saving time, making it ideal for scheduling across time zones.
Does this handle daylight saving time?
Yes. This converter uses your browser's built-in timezone database (IANA), which automatically accounts for daylight saving time rules for each location. The converted times reflect DST adjustments that are in effect on the selected date.
What is the International Date Line?
The International Date Line runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you add a day; eastward, you subtract a day. This means it's possible for the converted time to be on a different calendar date than the original.
How many time zones are there?
There are 38 unique UTC offsets in use worldwide, ranging from UTC-12 to UTC+14. Some offsets are non-standard half-hours or quarter-hours (like India at UTC+5:30, Nepal at UTC+5:45, and the Chatham Islands at UTC+12:45).

Related Calculators

🎂
Everyday

Age Calculator

Calculate exact age in years, months, and days from any birth date.

📅
Everyday

Date Difference Calculator

Find the exact number of days, weeks, months, and years between two dates.

⛽
Everyday

Fuel Cost Calculator

Estimate fuel costs for any trip based on distance, fuel efficiency, and gas prices.

🖥️
Everyday

Screen Size Calculator

Calculate screen dimensions, aspect ratio, and PPI from diagonal screen size.

🔒
Everyday

Password Strength Checker

Check how strong your password is and get suggestions to improve it.

💰
Finance

Loan Calculator

Calculate monthly payments, total interest, and amortization schedule for any loan type.

This page identifies the inputs, method, and limitations behind its estimates. Calculator outputs are not professional advice and should be checked against the relevant primary source for a consequential decision. This calculator's formula and defaults are drawn from standard published sources for its domain, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.

Inputs, defaults, and authoritative sources
Input Default Source / authority
All inputs Domain-typical defaults Editorial methodology, CalcMesh 2026