Source: EPSG:4326 — WGS 84
geographic system using latitude and longitude on an ellipsoid · Area of use: World (by country)
+proj=longlat +datum=WGS84 +no_defs +type=crsMore about EPSG:4326 →
Convert EPSG:4326 to EPSG:4403
Online coordinate converter from WGS 84 (EPSG:4326) to NAD27 / BLM 3N (ftUS) (EPSG:4403). Enter your source coordinates and get the result instantly. All transformations happen in your browser — no data is sent to any server.
Convert EPSG:4326 to EPSG:4403 in code
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4326", "EPSG:4403", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)Target: EPSG:4403 — NAD27 / BLM 3N (ftUS)
projected system measured in linear units (typically metres) · Area of use: USA - 168°W to 162°W - AK, OCS
+proj=tmerc +lat_0=0 +lon_0=-165 +k=0.9996 +x_0=500000.001016002 +y_0=0 +datum=NAD27 +units=us-ft +no_defs +type=crsMore about EPSG:4403 →
Frequently asked questions
- How accurate is converting WGS 84 to NAD27 / BLM 3N (ftUS)?
- Projection-only conversions are accurate to floating-point precision. If a datum shift is involved, browser-based tools use Helmert parameters which are accurate to roughly 1-5 m; for surveying-grade work apply the official grid-shift transformation in a desktop GIS.
- Does my data leave the browser when I use this converter?
- No. All coordinate transformations are computed locally in your browser using proj4js. The coordinates you enter are never transmitted to any server.