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Convert ITRF2020 to SWEREF99

Convert coordinates from ITRF2020 (EPSG:9988) to SWEREF99 (EPSG:4976) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-9988-to-epsg-4976

Official EPSG transformation from ITRF2020 to SWEREF99

The EPSG Geodetic Parameter Dataset defines 1 transformation between ITRF2020 (EPSG:9988) and SWEREF99 (EPSG:4976). Its parameters, accuracy and area of use are listed below.

ITRF2020 to SWEREF99 (1)

EPSG:10872±0.004 m
Method:
Concatenated operation
Area of use:
Sweden
Scope:
Geodesy.
  1. ITRF2020 to ETRF2014 (1) (null)
  2. ETRF2014 to NKG_ETRF14 (1) (null)
  3. NKG_ETRF14 to SWEREF99 (1) (null)

The coordinate epoch (in years) of the coordinates referenced to the source CRS (ITRF2020) is user-defined and is used as the source epoch in step 2. For coordinates originating before 2021-02-07, the NKG2008 transformation should be used.

Convert EPSG:9988 to EPSG:4976 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:9988", "EPSG:4976", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:9988 — ITRF2020

geocentric Cartesian system (Earth-centred Earth-fixed) · Area of use: World

+proj=geocent +ellps=GRS80 +units=m +no_defs +type=crs
More about EPSG:9988 →

Target: EPSG:4976 — SWEREF99

geocentric Cartesian system (Earth-centred Earth-fixed) · Area of use: Sweden

+proj=geocent +ellps=GRS80 +units=m +no_defs +type=crs
More about EPSG:4976 →

Frequently asked questions

How accurate is converting ITRF2020 to SWEREF99?
The most accurate official EPSG transformation between these systems is accurate to about ±0.004 m within its stated area of use. Browser-based converters approximate datum shifts with Helmert parameters; for surveying-grade work apply the official 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:4976 to EPSG:9988 →