Browse the atlas
Asset classes
- Transmission Line80,968
- Power Plant32,429
- Substation / Converter7,614
- Oil & Gas Field7,055
- Coal / Uranium Mine5,382
- Pipeline4,951
- Cement Plant3,513
- Data Centre3,283
- Iron & Steel Plant1,293
- LNG Terminal1,198
- Grid Storage965
- Iron Ore Mine949
- Chemical Plant868
- Interconnector704
- Export Terminal519
- Refinery279
- Storage / Tank Farm38
- Oil / Commodity Contract19
- Hydrogen Project18
- Carbon Capture (CCS)16
Chokepoints
Finland · electricity network
Finland power grid
OverWatts maps 6,783 km of Finland's electricity transmission network across 575 line segments and 55 substations, the 44th most-mapped grid of 153 countries. Its backbone is extra-high voltage (380–764 kV), carrying 5,720 km — 84% of the mapped length, with the highest tagged voltage at 500 kV. That works out to 20 km per 1,000 km² of land — moderate OpenStreetMap coverage, ahead of 56% of mapped countries. It is connected to 2 neighbouring grids by 3,416 MW of existing cross-border transfer capacity, with a further 2,800 MW planned.
OpenStreetMap coverage
This grades how completely OpenStreetMap has drawn Finland'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. 26% of segments carry a real line name and 36% an operator tag.
Mapped line length by voltage
- 380–764 kV5,720 km 84%
- 220–379 kV1,056 km 16%
- Voltage untagged6 km 0%
575 segments · a segment is credited to the country containing its midpoint, so a border-crossing line counts once, on one side.
Cross-border links from Finland
3.4 GW existing · 2.8 GW planned · capacities from the Global Transmission Database v0.1 (CC BY 4.0), existing as of 2023
On the interactive map
Load against the network
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 Finland's network
Segment counts from OSM `operator` tags, merged across spellings. Present on 36% of segments — this ranks who is recorded, not market share.
How Finland compares · mapped grid by country
- 1. People's Republic of China624,300 km
- 42. Belarus6,884 km
- 43. Nigeria6,822 km
- 44. Finland6,783 km
- 45. Turkmenistan6,639 km
- 46. New Zealand6,451 km
Frequently asked
- How big is Finland's transmission network?
- OverWatts maps 6,783 km of transmission line in Finland, across 575 segments, plus 55 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 Finland's grid?
- Most of the mapped network is extra-high voltage (380–764 kV): 5,720 km of 6,783 km. The highest voltage tagged anywhere in the country is 500 kV.
- How complete is the grid map for Finland?
- Moderate — 20 km of mapped line per 1,000 km² of land, ahead of 56% 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 Finland?
- Fingrid, Caruna, OX2 are tagged as operators on mapped segments. Operator tags are present on 36% of Finland's segments, so this ranks who is *recorded*, not market share.
- What interconnectors connect Finland to its neighbours?
- 3,416 MW of cross-border transfer capacity to Sweden, Estonia, plus 2,800 MW planned. Capacities are from the Global Transmission Database (v1.0, 2023).
Elsewhere in Finland
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.