| DMS | HMS | Seconds rounded? | Note |
| {y} |
Geographic Coordinate Conversion: Turn a Longitude into DMS or HMS
With this online calculator, you can easily convert a longitude expressed in degrees, minutes and seconds (DMS) into hours, minutes and seconds (HMS), or vice versa.
Using the longitude conversion calculator
Our DMS/HMS longitude converter was designed to be intuitive and fast. The tool consists of two main areas: the first lets you enter a longitude in degrees, minutes and seconds, while the second accepts a value in hours, minutes and seconds. As soon as you type a value in one of the fields, the corresponding conversion is performed automatically in the other format.
This interface greatly simplifies the calculations that map angular units to time units, while guaranteeing optimal accuracy.
Rounded seconds
To make results easier to read, seconds can be rounded to one decimal place. A note tells you whenever this rounding is applied.
Practical longitude conversion examples
If you enter a longitude of 45° 30′ 0″, the converter will immediately show the equivalent value in hours, minutes and seconds. Likewise, an entry of 3h 2m 0s will give the corresponding value in degrees, minutes and seconds. Seconds can be rounded to one decimal place to simplify the display without compromising the accuracy of the calculation.
Who is this geographic conversion tool for?
This longitude coordinate converter is aimed at astronomers who work with celestial coordinates, navigators who use longitudes to determine time, and geography and astronomy students who want to understand the relationship between angular and time units. It is a valuable educational and professional aid for anyone working with geographic coordinate systems.
Save and share your results
Once you have made your conversions, you can easily save your results or share them with other users. Use the dedicated buttons to keep a record of your calculations in CSV or PDF format.
Keyboard shortcuts
To make the calculator easier to use, several keyboard shortcuts are available:
m ⇝ Clear
f ⇝ Save