Coordinate Converter: Your Go-To Tool for Converting Coordinates

Supported Formats

The converter accepts three input formats — decimal degrees (DD), degrees-minutes-seconds (DMS), and UTM — and computes the other two automatically. Enter 40.7128, -74.0060 (New York City) in DD format and the tool returns 40°42'46"N 74°0'22"W in DMS: it takes the whole-degree part (40), multiplies the remainder by 60 for minutes (42), then multiplies what's left by 60 again for seconds (46).

DMS Input Pattern

DMS entries must follow the exact pattern degrees°minutes'seconds"direction for both latitude and longitude, separated by a space — for example 40°42'46"N 74°0'22"W. A missing symbol, wrong spacing, or extra character will fail to match and trigger the "Invalid coordinate format" alert rather than a partial result.

A Precision Note on UTM

The UTM conversion here uses a simplified spherical projection rather than the full ellipsoidal formulas a survey-grade UTM tool would use — the tool's own code comments flag both the forward and inverse UTM math as approximate. It's fine for a rough sense of zone, easting, and northing, but not for centimeter-level GIS or surveying work; use a dedicated geodesy library for that.

Why Convert Between Formats at All

DD is what most consumer GPS apps and mapping APIs expect. DMS is what you'll see on paper nautical charts, older survey documents, and some government coordinate listings. UTM is preferred for local distance and area calculations because it's a planar (meters-based) grid rather than an angular one, which makes straight-line measurements simpler over small areas.