GEOGRAPHY & CARTOGRAPHY CALCULATOR
Timezone By Coordinates
A precise tool.
What is the Timezone By Coordinates & How does it work?
The Earth completes one full rotation of 360Β° every 24β―hours, which naturally divides the planet into 24 longitudinal zones of roughly 15Β° each, forming the basis of modern timeβzone boundaries.
A positionβs longitude (Ξ») determines its offset from the prime meridian; by converting this angular distance into hours we can estimate the local civil time.
\text{UTC offset} = \left\lfloor \frac{\lambda}{15^\circ} \right\rceil
Ξ» = longitude in degrees
Rounding the computed offset to the nearest whole hour yields the conventional timeβzone label (e.g., UTCβ5 for a longitude of β75Β°), which can be refined with political boundaries for final results.
Parameters
Result
β
Frequently Asked Questions
How do I find my longitude?
You can find your longitude using GPS or by looking it up online with your city name.
What is the prime meridian?
The prime meridian is the line of longitude at 0Β°, which passes through Greenwich, England.
How does this calculator work?
This calculator estimates your local time zone by dividing your longitude by 15 degrees and rounding to the nearest whole number.
Why is the Earth divided into 24 time zones?
The Earth is divided into 24 time zones because it takes approximately 24 hours for the planet to complete one full rotation.
Can I use this calculator for any location on Earth?
Yes, you can use this calculator for any location by entering its longitude in degrees.
What is UTC offset?
UTC offset is the difference in hours between a specific time zone and Coordinated Universal Time (UTC).
How accurate is this timezone calculation?
This calculation provides an estimate based on longitude, but actual time zones may vary due to political or administrative decisions.
Results are for informational purposes only and do not constitute professional advice.