Address to Coordinates Converter (Lat/Long & UTM)
Convert any street address, city, or global landmark into geographic coordinates. Formats results in Decimal Degrees (DD), Degrees Minutes Seconds (DMS), Degrees Decimal Minutes (DMM), and Universal Transverse Mercator (UTM).
Ready to Geocode Address
Enter any street address, landmark, or city name to resolve latitude and longitude coordinates (typically within tens of meters for street addresses).
How to use the address to coordinates converter
- 1Type an address
Enter a full or partial street address, place or landmark.
- 2Geocode it
The address is matched with OpenStreetMap-based geocoding (Photon) to a point on the map.
- 3Copy the coordinates
Copy latitude and longitude in DD, DMS, DMM or UTM, and check the pin on the map.
How Address to Coordinates Conversion Works
Forward geocoding is the algorithmic process of parsing an unstructured physical street address (such as “1600 Amphitheatre Pkwy, Mountain View, CA”) and translating it into an unambiguous numerical pair of geodetic coordinates on Earth's surface.
Every global positioning device, autonomous vehicle, and GIS database relies on forward geocoding to bridge human-readable naming conventions with mathematical reference systems. Open Map Lab uses high-accuracy spatial indexing to deliver instant coordinate conversion with complete client privacy. When there is no street address to type, for example at a trailhead or a field gate, you can find GPS coordinates from your device's location or a click on the map instead.
Rooftop vs. Street-Level Geocoding: Which Is More Accurate?
Not all geocoded coordinates have equal accuracy. Geocoding engines operate on multiple distinct tiers:
- Rooftop Accuracy: The coordinate matches the geometric centroid of the actual structure or building footprint, providing meter-level precision.
- Linear Street Interpolation: If building footprint data is unavailable, the engine examines a known street segment (e.g., Main Street numbers 100 to 200). An address of 150 Main Street is calculated mathematically halfway along the centerline of the road segment, offset toward the appropriate side of the street (odd vs. even numbers).
- Area Centroids: If the street address cannot be verified, the geocoder degrades gracefully to the neighborhood, 5-digit ZIP code, or city center point.
Coordinate Formats: WGS84 and Decimal Degrees
Once an address is resolved, Open Map Lab outputs the coordinate across all international industry formats:
- • Decimal Degrees (DD): Standard for modern web mapping, API integrations, and GPS navigation (e.g.,
37.422476, -122.084250). - • Degrees Minutes Seconds (DMS): Maritime and aeronautical standard notation (e.g.,
37° 25′ 20.9″ N, 122° 05′ 03.3″ W). - • Universal Transverse Mercator (UTM): Engineering planar grid dividing Earth into 60 zones with metric northing and easting offsets.
How Street Address Interpolation Is Calculated
Mathematical algorithm for interpolating a street number along an established road vector:
\mathbf{P} = \mathbf{V}_{\text{start}} + \left( \frac{N - N_{\text{start}}}{N_{\text{end}} - N_{\text{start}}} \right) \cdot (\mathbf{V}_{\text{end}} - \mathbf{V}_{\text{start}}) + \vec{w}_{\text{offset}}- Compute longitudinal fraction: 0.40 × (38.8995° - 38.8977°) = +0.00072°
- Centerline coordinate: 38.8977° + 0.00072° = 38.89842° N, -77.0365° W
- Even address rule: Apply 10-meter perpendicular right-hand offset vector
- Final estimated building coordinate: 38.89842° N, -77.03638° W
Linear interpolation reliably places delivery destinations within meters of the target driveway without requiring manual surveying.
How Accurate Are Address Coordinates? Accuracy Levels
Compare the standard geocoding hierarchy from precise property parcels down to municipal approximations:
Geocoding Precision & Hierarchy Classification
Conforms to FGDC (Federal Geographic Data Committee) spatial positional standards.
| Accuracy Tier | Methodology | Typical Error | Primary Application |
|---|---|---|---|
| Rooftop / Parcel Point | Surveyed parcel centroid or structure building polygon | 1 – 5 meters | Cadastral surveying, deed recording, property boundary analysis |
| Street Address Interpolation | Linear interpolation along a street segment with known house-number ranges | 15 – 40 meters | Ride-share navigation, consumer deliveries, package logistics |
| Street Centerline | Midpoint of named street road segment | 100 – 500 meters | City planning, municipal routing, emergency sector planning |
| ZIP+4 Centroid | Block face or single large building delivery cluster | 50 – 150 meters | Direct mail marketing, market demographic analysis |
| City / Municipality Centroid | Administrative hall or geographic center of city limits | 1,000 – 10,000 meters | Macro weather forecasting, regional travel itineraries |
Why Some Addresses Fail to Geocode: Limitations
Before relying on geocoded points for property demarcation, consider these real-world exceptions:
- Rural Delivery Routes: In unaddressed rural expanses, addresses like 'Route 4, Box 210' cannot be linearly interpolated and will default to regional postal centroids.
- Sub-Unit Obscurity: Apartment, suite, and floor numbers share a single geocoded building entry point; vertical position (floor level) is not represented.
- Newly Built Subdivisions: Roads platted in the last 6 to 18 months may not yet appear in OpenStreetMap or other address databases that geocoders rely on.
Related Coordinate Conversion Tools
Reverse a coordinate back to an address with Coordinates to Address or format coordinates using the GPS Coordinate Converter.
Quick facts about the address to coordinates converter
| Fact | Value | Notes |
|---|---|---|
| Coordinate Formats | DD, DMS, DMM, UTM | Universal coordinate compatibility |
| Geocoding Engine | OpenStreetMap Nominatim | Open standard spatial index |
| Datum | WGS84 (EPSG:4326) | GPS and GNSS standard |
Edge cases and exceptions
Rooftop vs. Street Interpolation
For rural addresses without rooftop polygons, coordinates represent interpolated street address numbers.
The address to coordinates converter: worked examples
Empire State Building Coordinates
Scenario: Converting 350 5th Ave, New York, NY 10118.
Outcome: Resolves to 40.748817° N, -73.985428° W (UTM 18T 585671m E 4511263m N).
Frequently asked questions about the address to coordinates converter
What formats are coordinates provided in?
We provide Decimal Degrees (DD), Degrees Minutes Seconds (DMS), Degrees Decimal Minutes (DMM), and Universal Transverse Mercator (UTM).
How do I get the latitude and longitude of an address?
Type the full address and press search. The tool returns the matched point and formats it as decimal degrees, DMS, DMM and UTM.
How accurate is geocoding?
In cities, address points are often accurate to the building or street segment. In rural areas the result may be interpolated or fall back to a road or town.
What is forward geocoding?
Converting a text address into coordinates. The reverse, coordinates to an address, is reverse geocoding.
Why does my address return the wrong place?
Add the city, state and country, check spelling, and avoid abbreviations that are ambiguous. Many streets repeat across cities.
Does the tool work for addresses outside the United States?
Yes. The geocoder searches OpenStreetMap data worldwide, but address coverage varies by country.
Can I geocode a landmark or business?
Yes. Landmarks and well-mapped places often work better by name than by street address.
Is the address I type stored?
Open Map Lab does not store your searches. The text is sent to the Photon geocoder, which is based on OpenStreetMap, to find the match.
What is the difference between a rooftop and a street-centerline match?
A rooftop match is the building location; a centerline match is a point along the road, which may be some distance from the building.
Can I bulk geocode a spreadsheet?
Not here. This tool geocodes one address at a time. Bulk work requires a geocoding service with usage terms.
How do I get coordinates to enter into a GPS device?
Copy the decimal degrees or DMM format, depending on what the device accepts, and check the datum is WGS84.
Keep exploring
What to do with this result
- Coordinates to Address Converter (Reverse Geocoder)Use this to convert coordinates to an address.
- What County Am I In?Use this to find out what county you are in.
- What Is My Elevation?Use this to check your current elevation.
- GPS Coordinate Converter (DMS, DMM & Decimal Degrees)Use this to convert GPS coordinate formats.
- UTM to Lat/Long Converter (Easting & Northing)Use this to convert UTM to latitude and longitude.
- What Time Zone Am I In?Use this to check your current time zone.
- Plot Multiple Addresses on a MapUse this to plot multiple addresses on a map.