State Plane Coordinate Converter
Free converter for surveyors, engineers and layout crews. Find your zone, then convert latitude and longitude to state plane northing and easting or back, one point or a whole spreadsheet.
Results are for planning and checking. Verify against your project's control and the National Geodetic Survey before staking or recording. Inputs are NAD83; phone and web map coordinates are WGS84 and can differ by 1 to 2 meters.
What is the state plane coordinate system?
The State Plane Coordinate System (SPCS) divides the United States into about 120 zones, each with its own flat grid. Inside a zone you work in northing and easting, simple distances in feet or meters from a fixed origin, instead of latitude and longitude. Zones follow state and county lines and use a Lambert Conformal Conic projection for states that run east to west or a Transverse Mercator projection for states that run north to south, which keeps distortion to about 1 part in 10,000. Surveyors, civil engineers, GIS teams and construction layout crews use state plane coordinates because plans, plats and machine control files are drawn on them. This converter uses the current NAD83(2011) zones from the National Geodetic Survey.
State plane coordinate system map
Tap a zone to set it in the converter. Alaska, Hawaii and Puerto Rico zones are in the converter but not on this map.
State plane zones by state
Every U.S. state plane zone with its FIPS zone code, the default unit we use for each state's NAD83 definition, and the matching EPSG code for NAD83(2011). Confirm the unit with your project before you rely on it.
| State | Zones | Zone (FIPS) | Default unit | EPSG, NAD83(2011) |
|---|---|---|---|---|
| Alabama | 2 | East (101); West (102) | US survey feet | 9748, 9749 |
| Alaska | 10 | Zone 1 (5001); Zone 2 (5002); Zone 3 (5003); Zone 4 (5004); Zone 5 (5005); Zone 6 (5006); Zone 7 (5007); Zone 8 (5008); Zone 9 (5009); Zone 10 (5010) | Meters | 6394, 6395, 6396, 6397, 6398, 6399, 6400, 6401, 6402, 6403 |
| Arizona | 3 | East (201); Central (202); West (203) | International feet | 6407, 6405, 6409 |
| Arkansas | 2 | North (301); South (302) | US survey feet | 6411, 6413 |
| California | 6 | Zone 1 (401); Zone 2 (402); Zone 3 (403); Zone 4 (404); Zone 5 (405); Zone 6 (406) | US survey feet | 6416, 6418, 6420, 6422, 6424, 6426 |
| Colorado | 3 | North (501); Central (502); South (503) | US survey feet | 6430, 6428, 6432 |
| Connecticut | 1 | Single zone (600) | US survey feet | 6434 |
| Delaware | 1 | Single zone (700) | US survey feet | 6436 |
| Florida | 3 | East (901); West (902); North (903) | US survey feet | 6438, 6443, 6441 |
| Georgia | 2 | East (1001); West (1002) | US survey feet | 6445, 6447 |
| Hawaii | 5 | Zone 1 (5101); Zone 2 (5102); Zone 3 (5103); Zone 4 (5104); Zone 5 (5105) | Meters, US survey feet | 6628, 6629, 6633, 6631, 6632 |
| Idaho | 3 | East (1101); Central (1102); West (1103) | US survey feet | 6451, 6449, 6453 |
| Illinois | 2 | East (1201); West (1202) | US survey feet | 6455, 6457 |
| Indiana | 2 | East (1301); West (1302) | US survey feet | 6459, 6461 |
| Iowa | 2 | North (1401); South (1402) | US survey feet | 6463, 6465 |
| Kansas | 2 | North (1501); South (1502) | US survey feet | 6467, 6469 |
| Kentucky | 3 | Single zone (1600); North (1601); South (1602) | US survey feet | 6473, 6471, 6475 |
| Louisiana | 2 | North (1701); South (1702) | US survey feet | 6477, 6479 |
| Maine | 2 | East (1801); West (1802) | US survey feet | 6484, 6486 |
| Maryland | 1 | Single zone (1900) | US survey feet | 6488 |
| Massachusetts | 2 | Mainland (2001); Island (2002) | US survey feet | 6492, 6490 |
| Michigan | 3 | North (2111); Central (2112); South (2113) | International feet | 6496, 6494, 6499 |
| Minnesota | 3 | North (2201); Central (2202); South (2203) | US survey feet | 6503, 6501, 6505 |
| Mississippi | 2 | East (2301); West (2302) | US survey feet | 6507, 6510 |
| Missouri | 3 | East (2401); Central (2402); West (2403) | Meters | 6512, 6511, 6513 |
| Montana | 1 | Single zone (2500) | International feet | 6515 |
| Nebraska | 1 | Single zone (2600) | US survey feet | 6880 |
| Nevada | 3 | East (2701); Central (2702); West (2703) | US survey feet | 6521, 6519, 6523 |
| New Hampshire | 1 | Single zone (2800) | US survey feet | 6525 |
| New Jersey | 1 | Single zone (2900) | US survey feet | 6527 |
| New Mexico | 3 | East (3001); Central (3002); West (3003) | US survey feet | 6531, 6529, 6533 |
| New York | 4 | East (3101); Central (3102); West (3103); Long Island (3104) | US survey feet | 6537, 6535, 6541, 6539 |
| North Carolina | 1 | Single zone (3200) | US survey feet | 6543 |
| North Dakota | 2 | North (3301); South (3302) | International feet | 6545, 6547 |
| Ohio | 2 | North (3401); South (3402) | US survey feet | 6549, 6551 |
| Oklahoma | 2 | North (3501); South (3502) | US survey feet | 6553, 6555 |
| Oregon | 2 | North (3601); South (3602) | International feet | 6559, 6561 |
| Pennsylvania | 2 | North (3701); South (3702) | US survey feet | 6563, 6565 |
| Puerto Rico & U.S. Virgin Islands | 1 | Single zone (5200) | Meters | 6566 |
| Rhode Island | 1 | Single zone (3800) | US survey feet | 6568 |
| South Carolina | 1 | Single zone (3900) | International feet | 6570 |
| South Dakota | 2 | North (4001); South (4002) | US survey feet | 6572, 6574 |
| Tennessee | 1 | Single zone (4100) | US survey feet | 6576 |
| Texas | 5 | North (4201); North Central (4202); Central (4203); South Central (4204); South (4205) | US survey feet | 6582, 6584, 6578, 6588, 6586 |
| Utah | 3 | North (4301); Central (4302); South (4303) | US survey feet | 6626, 6625, 6627 |
| Vermont | 1 | Single zone (4400) | US survey feet | 6590 |
| Virginia | 2 | North (4501); South (4502) | US survey feet | 6593, 6595 |
| Washington | 2 | North (4601); South (4602) | US survey feet | 6597, 6599 |
| West Virginia | 2 | North (4701); South (4702) | US survey feet | 6601, 6603 |
| Wisconsin | 3 | North (4801); Central (4802); South (4803) | US survey feet | 6607, 6605, 6609 |
| Wyoming | 4 | East (4901); East Central (4902); West Central (4903); West (4904) | US survey feet | 6612, 6614, 6618, 6616 |
State plane coordinate questions
What state plane zone am I in?
Enter your latitude and longitude above, or tap Use my location, and the converter finds your zone. Most states have one to five zones split along county lines; Alaska has ten. Near a zone line, use the zone your project control is in.
What is the state plane coordinate system?
The State Plane Coordinate System is a set of about 120 flat map grids, called zones, that cover the United States. The National Geodetic Survey designed them so surveyors and engineers can work in northing and easting distances instead of latitude and longitude, with distortion kept to about 1 part in 10,000 or better.
Should I use US survey feet or international feet?
Use the unit your project and your state use. The two differ by 2 parts per million, which adds up to several feet on state plane coordinates in the millions. The converter defaults to each state's unit for NAD83. The National Geodetic Survey retired the US survey foot at the end of 2022, but many existing projects still use it.
What is the difference between grid and ground distances?
State plane coordinates live on a flat grid, so a distance measured on the ground is slightly different from the same distance on the grid. The grid scale factor shown with each result, combined with an elevation factor for your site, converts between the two. At higher elevations the difference can reach several tenths of a foot per mile.
Is my GPS or phone location NAD83 or WGS84?
Phones and web maps use WGS84. Survey-grade GPS with a correction network like HxGN SmartNet usually delivers NAD83. In the United States the two currently differ by about 1 to 2 meters, which is fine for finding your zone but not for survey work.
How accurate is this converter?
The conversion math uses the official zone definitions. In our testing across all 123 zones, results matched the PROJ reference library to well under a millimeter. Your result is only as good as your input, so check it against your project control before staking.
Can I convert a whole spreadsheet of points?
Yes. Open the Batch tab, paste the columns from Excel (point ID, latitude, longitude or point ID, northing, easting), and download the results as a CSV. Up to 10,000 points at a time, and your data never leaves your browser.
Equipment and help for working in state plane
Datum Tech Solutions is a Leica Authorized Service and Distribution Partner. We sell, rent, calibrate and train on the GPS and total station equipment that puts these coordinates on the ground.
Working on a project and need help with coordinates? Talk to our team.