Free Online Coordinate Converter

Trusted by engineers, surveyors, and GIS professionals worldwide

Transform geographic positions between different formats instantly. Enter latitude/longitude, UTM, MGRS, or DMS coordinates below. Free, private, and no signup required.

WGS84 Compliant
Precision: 0.0000001

Recent Conversions

100% Client-Side —No data is ever sent outside your browser

New to coordinates? Start here.

What is Latitude & Longitude?

The global standard for GPS. Learn how decimal degrees work.

 What are Map Projections?

Why all maps are distorted and how 3D Earth becomes 2D.

 What is UTM?

The map system that uses meters instead of degrees.

 How GPS Works

Satellites, trilateration, and why your phone needs the sky.

 What is GNSS?

The difference between GPS, Galileo, and GLONASS.

 What is RTK?

How drones and tractors achieve centimeter-level accuracy.

 Geoid vs Ellipsoid

Understanding Earth's true shape and elevation (Mean Sea Level).

 How Accurate is GPS?

Difference between a smartphone and a pro surveyor.
Popular converters

Frequently Asked Questions (Beginners)

What is a GPS coordinate?

A GPS coordinate is a unique address for a specific location on Earth. It uses two numbers: Latitude (how far North or South) and Longitude (how far East or West), to pinpoint any spot on the globe.

Can I use this tool on my phone?

Yes! Our free coordinate converter is 100% mobile-friendly. You can open it on any iPhone, iPad, or Android device to convert map coordinates while hiking, driving, or surveying in the field.

What is the difference between UTM and Lat/Long?

Lat/Long uses degrees (like angles on a circle) to find locations on a globe. UTM uses meters on a flat grid. UTM is much easier for measuring distance on paper maps, which is why the military and emergency responders use it.

Is my location data saved?

No. All conversions happen entirely inside your web browser (client-side). We do not collect, save, or transmit your coordinate data to any servers. Your privacy is guaranteed.

Professional Guides & Resources

Datum Shift Explained

Avoid costly errors between different datums.

Read Guide

EPSG:4326 vs 3857

Critical difference for web mapping.

Read Guide

Decimal Precision

How many decimal places do you really need?

Read Guide

Real-World Coordinate Failures

$750K Oil Rig Error

Jack-up rig moored 1.5km off location due to ellipsoid error.

Read Case Study

$500K Subsea Error

Manifold installed 136m off-target due to datum confusion.

Read Case Study

Warning: Verify Your Calculation

Coordinate accuracy varies by device and datum. Do not use these results for legal or construction purposes without checking:

GPS Accuracy Alert

Your phone's GPS can be off by 30 meters. This can cause critical errors in your data.

Check My Accuracy

Datum Shift Risk

Using the wrong coordinate system (e.g. WGS84 vs NAD83) creates a permanent 1-meter offset.

Verify My Datum

Professional Context: Why Precision Matters

The WGS84 vs. NAD83 Dilemma

Most beginners assume that all latitude/longitude coordinates are the same. However, in North America, the difference between the WGS84 (used by GPS) and NAD83 (used for local surveying) can result in a physical shift of up to 1 meter. For high-precision construction projects, failing to account for this "datum shift" can lead to catastrophic misalignment of foundations or property boundaries.

Coordinate Drift Over Time

Tectonic plate movement means that your physical location on Earth is constantly moving relative to the GPS satellite network. In regions like Australia, this drift is significant enough that coordinate reference systems must be updated periodically. Our tools utilize the most stable geodetic algorithms to ensure that your conversions remain mathematically sound across different epochs.