Iceland vs Slovakia: Primary energy use by source
Iceland
0.0104 terawatt-hours
in 2025
Slovakia
0.005 terawatt-hours
in 2025
Iceland rank
70th
Slovakia rank
72nd
Primary energy use by source over time
- Iceland
- Slovakia
How they compare
Iceland currently reports 0.0104 terawatt-hours against 0.005 terawatt-hours in Slovakia, a difference of 0.0054 terawatt-hours.
That makes Iceland's figure about 2.1 times Slovakia's.
The two have swapped places 3 times across 61 shared years of data; in 1965 it was Slovakia ahead.
Iceland ranks 70th and Slovakia ranks 72nd of 79 countries.
Across the 7 decades both report, Iceland averaged higher in 1 and Slovakia in 2.
Head to head by decade
| Decade | Iceland | Slovakia | Difference | Ahead |
|---|---|---|---|---|
| 1960s | 0 terawatt-hours | 0 terawatt-hours | 0 terawatt-hours | — |
| 1970s | 0 terawatt-hours | 0 terawatt-hours | 0 terawatt-hours | — |
| 1980s | 0 terawatt-hours | 0 terawatt-hours | 0 terawatt-hours | — |
| 1990s | 0 terawatt-hours | 0 terawatt-hours | 0 terawatt-hours | — |
| 2000s | 0 terawatt-hours | 0.0041 terawatt-hours | 0.0041 terawatt-hours | Slovakia |
| 2010s | 0.0053 terawatt-hours | 0.0059 terawatt-hours | 0.0006 terawatt-hours | Slovakia |
| 2020s | 0.0081 terawatt-hours | 0.0045 terawatt-hours | 0.0036 terawatt-hours | Iceland |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher primary energy use by source, Iceland or Slovakia?
- Iceland, at 0.0104 terawatt-hours against 0.005 terawatt-hours in Slovakia as of 2025.
- What is the difference in primary energy use by source between Iceland and Slovakia?
- 0.0054 terawatt-hours, with Iceland ahead.
- How many years of comparable data are there for Iceland and Slovakia?
- 61 years are reported by both, from 1965 to 2025.
- How do Iceland and Slovakia rank globally for primary energy use by source?
- Iceland ranks 70th and Slovakia ranks 72nd of 79 countries.
- Where does this data come from?
- Energy Institute - Statistical Review of World Energy (2026); Smil (2017) – with major processing by Our World in Data, published as Primary energy use by source. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Measured in terawatt-hours of total energy supply.