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Convert EPSG:9870 to EPSG:26912

Online coordinate converter from MRH21 Grid + ODN height (EPSG:9870) to NAD83 / UTM zone 12N (EPSG:26912). Enter your source coordinates and get the result instantly. All transformations happen in your browser — no data is sent to any server.

Direct link to this transformation: epsgtransform.com/transform/epsg-9870-to-epsg-26912

Convert EPSG:9870 to EPSG:26912 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:9870", "EPSG:26912", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:9870 — MRH21 Grid + ODN height

compound horizontal + vertical reference system · Area of use: UK - Cardiff to Lincoln

+proj=tmerc +lat_0=52.3 +lon_0=-1.8 +k=1 +x_0=227286.9881 +y_0=265751.2874 +ellps=GRS80 +units=m +geoidgrids=uk_os_OSGM15_GB.tif +geoid_crs=WGS84 +vunits=m +no_defs +type=crs
More about EPSG:9870 →

Target: EPSG:26912 — NAD83 / UTM zone 12N

projected system measured in linear units (typically metres) · Area of use: North America - 114°W to 108°W and NAD83 by country

+proj=utm +zone=12 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs
More about EPSG:26912 →

Frequently asked questions

How accurate is converting MRH21 Grid + ODN height to NAD83 / UTM zone 12N?
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.
Need the reverse? Convert EPSG:26912 to EPSG:9870 →