---
title: "Time Zone Difference Calculator | Numequo"
description: "Compare two time zones on a chosen date, including daylight-saving changes. Includes the formula and practical examples."
canonical: "https://www.numequo.com/time/durations-schedules/time-zone-difference-calculator/"
locale: "en"
---
[Numequo](https://www.numequo.com/) › [Time](https://www.numequo.com/time/) › [Durations and schedules](https://www.numequo.com/time/durations-schedules/)

# Time Zone Difference Calculator

Select two cities and a date to calculate their UTC offsets and time difference.

## Input data

- **Source time zone** - type: choice; default: Europe/Paris; options: UTC, Paris, London, New York, Chicago, Denver, Los Angeles, São Paulo, Dubai, Delhi / Kolkata, Singapore, Tokyo, Sydney, Auckland
- **Target time zone** - type: choice; default: America/New_York; options: UTC, Paris, London, New York, Chicago, Denver, Los Angeles, São Paulo, Dubai, Delhi / Kolkata, Singapore, Tokyo, Sydney, Auckland
- **Date** - type: date; default: 2026-08-12

## How it works

Difference = target UTC offset − source UTC offset at noon on the selected date.

## Quick examples

- **Paris ↔ New York** - Source time zone: Europe/Paris, Target time zone: America/New_York, Date: 2026-08-12
- **London ↔ Tokyo** - Source time zone: Europe/London, Target time zone: Asia/Tokyo, Date: 2026-01-15
- **Los Angeles ↔ Sydney** - Source time zone: America/Los_Angeles, Target time zone: Australia/Sydney, Date: 2026-07-01

## Understanding your result

The difference can change during the year when the two regions switch daylight-saving time on different dates.

Last verified: 29 September 2026 (2026-09-29)

## Frequently asked questions

### Is daylight saving time included?

Yes. The browser’s IANA time-zone data is applied for the selected date.

### Why can the difference change?

Regions can change clocks on different dates or not use daylight saving at all.

### Why is the calculation made at noon?

Noon avoids most clock-change transition hours while representing the selected date.

## Related calculators

- [Time Zone Meeting Planner](https://www.numequo.com/time/durations-schedules/time-zone-meeting-planner/) - Convert a meeting date and time from one time zone to another.
- [Arrival Time Calculator](https://www.numequo.com/time/durations-schedules/arrival-time-calculator/) - Add a travel duration to a departure time to find the arrival time.
- [Time Duration Calculator](https://www.numequo.com/time/durations-schedules/duration-calculator/) - Find the elapsed time between two clock times.
- [Work Hours Calculator](https://www.numequo.com/time/durations-schedules/work-hours-calculator/) - Calculate your net working hours, deduct breaks and compare the result with your daily target.
- [Duration Add or Subtract Calculator](https://www.numequo.com/time/durations-schedules/duration-add-subtract-calculator/) - Add or subtract two durations expressed as hours and minutes.
- [Weekly Timesheet Calculator](https://www.numequo.com/time/durations-schedules/weekly-timesheet-calculator/) - Calculate weekly working hours from daily start times, end times and unpaid breaks.

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