NAD83(2011) State Plane Converter

Any NAD83(2011) SPC zone → Latitude / Longitude (WGS84)
US Survey Feet (or International Feet / meters where applicable)

1 Select State Plane Zone

Prefer US Survey Feet versions. Michigan & a few others use International Feet by statute. Definitions load live from EPSG.

2 Expected CSV Format

Your CSV should contain Easting (X) and Northing (Y) columns in the units of the selected zone.

Example:

ID,Easting,Northing,Description
1,500000.00,1500000.00,Sample point A
2,510250.50,1498750.25,Sample point B

3 Upload CSV

📄

Drop CSV here or click to browse

Accepts .csv files

Conversion uses Proj4js with official EPSG definitions (loaded from epsg.io). NAD83(2011) is treated as coincident with WGS84 for most practical purposes (sub-meter differences possible). All processing happens in your browser — files never leave your device.