Two ways to write one coordinate
Geographic latitude and longitude can be written as decimal degrees or as degrees, minutes, and seconds, usually abbreviated DMS. A degree has 60 minutes and a minute has 60 seconds. The notation is angular, not a clock time. Choose latitude or longitude before conversion because latitude has a 90-degree boundary, longitude has a 180-degree boundary, and the available hemisphere letters differ. Positive latitude points north and negative latitude south; positive longitude points east and negative longitude west. This page converts in both directions so a GPS value can be compared with a map, survey note, or camera metadata without silently changing its direction.
Convert 48.1486° north step by step
For a positive latitude of 48.1486°, keep the whole 48 degrees. Multiply the fractional 0.1486 by 60 to obtain 8.916 minutes. Keep 8 whole minutes, then multiply the remaining 0.916 by 60 to obtain 54.96 seconds. The result is 48° 8′ 54.96″ N. In the reverse direction, compute 48 + 8/60 + 54.96/3600 to recover 48.1486°. A west or south hemisphere applies a negative sign to the final decimal result. Keeping the hemisphere separate from the numeric fields avoids a double negative when converting back.
Precision and boundary checks
Seconds can be displayed with zero to four decimal places. The calculator rounds the total angular seconds first, then divides them into degrees, minutes, and seconds; this prevents an impossible display such as 59 minutes and 60 seconds. When rounding crosses a boundary, the next minute or degree appears automatically. Latitude outside −90° to +90° and longitude outside −180° to +180° are rejected. Exactly 90° latitude or 180° longitude cannot have extra nonzero minutes or seconds. A coordinate near zero needs its hemisphere preserved when the source explicitly specifies N, S, E, or W.
Use coordinates without changing the location
A decimal coordinate pair is normally ordered latitude first, longitude second, but some mapping systems or geographic file formats use another order. Check the destination’s field labels instead of assuming. A missing minus sign can move a point across the equator or prime meridian; confusing E with W can move it to another continent. Keep enough decimal or second precision for the map scale and measurement source, but do not invent precision that the original coordinates lacked. This calculator changes notation only; it does not transform between geodetic datums, map projections, or coordinate reference systems. Confirm those separately for surveying or navigation work.