How big is Denmark's transmission network?

OverWatts maps 1,149 km of transmission line in Denmark, across 529 segments, plus 29 substations. This is mapped length from OpenStreetMap, not an operator-reported total — where OSM is incomplete the figure is a floor, never a ceiling.

What voltage is Denmark's grid?

Most of the mapped network is extra-high voltage (380–764 kV): 1,035 km of 1,149 km. The highest voltage tagged anywhere in the country is 500 kV.

How complete is the grid map for Denmark?

Moderate — 27 km of mapped line per 1,000 km² of land, ahead of 67% of the 153 countries with any mapped grid. Coverage grades how completely OpenStreetMap has drawn the network, not how much network exists; large, sparsely-populated countries score low for geographic reasons alone.

Who operates the grid in Denmark?

Energinet, Energinet.dk are tagged as operators on mapped segments. Operator tags are present on 42% of Denmark's segments, so this ranks who is *recorded*, not market share.

What interconnectors connect Denmark to its neighbours?

8,490 MW of cross-border transfer capacity to Germany, Sweden, Norway, Netherlands, plus 4,500 MW planned. Capacities are from the Global Transmission Database (v1.0, 2023).

Denmark · electricity network

Denmark power grid

OverWatts maps 1,149 km of Denmark's electricity transmission network across 529 line segments and 29 substations, the 106th most-mapped grid of 153 countries. Its backbone is extra-high voltage (380–764 kV), carrying 1,035 km — 90% of the mapped length, with the highest tagged voltage at 500 kV. That works out to 27 km per 1,000 km² of land — moderate OpenStreetMap coverage, ahead of 67% of mapped countries. It is connected to 4 neighbouring grids by 8,490 MW of existing cross-border transfer capacity, with a further 4,500 MW planned.

Open the grid lens →Denmark profile →

1,149 km

Mapped transmission line

Substations

#106

of 153 mapped grids

8.5 GW

cross-border · 4 neighbours

500 kV

Highest voltage

OpenStreetMap coverage

Moderate27 km / 1,000 km²ahead of 67% of 153 mapped countries

This grades how completely OpenStreetMap has drawn Denmark's network — not how much network exists. Large, sparsely-populated countries score low for geographic reasons alone, and every kilometre here is mapped length, so the totals are a floor rather than an operator-reported figure. 5% of segments carry a real line name and 42% an operator tag.

Mapped line length by voltage

380–764 kV1,035 km 90%
220–379 kV115 km 10%

529 segments · a segment is credited to the country containing its midpoint, so a border-crossing line counts once, on one side.

8.5 GW existing · 4.5 GW planned · capacities from the Global Transmission Database v0.1 (CC BY 4.0), existing as of 2023

On the interactive map

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Load against the network

6.9 GW

Operating generation

Data centres mapped

km of line per substation

km per 1,000 km²

Where there is room to connect a new load depends on published hosting capacity, which most operators release only as their own map. OverWatts does not yet ingest those feeds, so these are the density measures the open data supports — generation and mapped demand against mapped network — not a headroom figure.

Operators tagged on Denmark's network

Energinet210 94%
Energinet.dk13 6%

Segment counts from OSM `operator` tags, merged across spellings. Present on 42% of segments — this ranks who is recorded, not market share.

How Denmark compares · mapped grid by country

1. People's Republic of China624,300 km
104. Ghana1,192 km
105. Albania1,160 km
106. Denmark1,149 km
107. Belgium1,090 km
108. Iceland1,075 km

Frequently asked

How big is Denmark's transmission network?: OverWatts maps 1,149 km of transmission line in Denmark, across 529 segments, plus 29 substations. This is mapped length from OpenStreetMap, not an operator-reported total — where OSM is incomplete the figure is a floor, never a ceiling.
What voltage is Denmark's grid?: Most of the mapped network is extra-high voltage (380–764 kV): 1,035 km of 1,149 km. The highest voltage tagged anywhere in the country is 500 kV.
How complete is the grid map for Denmark?: Moderate — 27 km of mapped line per 1,000 km² of land, ahead of 67% of the 153 countries with any mapped grid. Coverage grades how completely OpenStreetMap has drawn the network, not how much network exists; large, sparsely-populated countries score low for geographic reasons alone.
Who operates the grid in Denmark?: Energinet, Energinet.dk are tagged as operators on mapped segments. Operator tags are present on 42% of Denmark's segments, so this ranks who is *recorded*, not market share.
What interconnectors connect Denmark to its neighbours?: 8,490 MW of cross-border transfer capacity to Germany, Sweden, Norway, Netherlands, plus 4,500 MW planned. Capacities are from the Global Transmission Database (v1.0, 2023).

Elsewhere in Denmark

Transmission lines Substations Power plants Data centres

Network geometry: OpenStreetMap (ODbL) © OpenStreetMap contributors, ingested and measured by OverWatts · derived 2026-07-26. Counts every mapped line of 220 kV and above; the map layer draws the ≥380 kV backbone only, so it shows less than is measured here.