CIS (EI) vs Iran: Fossil fuel supply by source
CIS (EI)
6,153 terawatt-hours
in 2025
Iran
2,563 terawatt-hours
in 2025
CIS (EI) rank
2nd
Iran rank
5th
Fossil fuel supply by source over time
- CIS (EI)
- Iran
How they compare
CIS (EI) currently reports 6,153 terawatt-hours against 2,563 terawatt-hours in Iran, a difference of 3,590 terawatt-hours.
That makes CIS (EI)'s figure about 2.4 times Iran's.
Across all 61 years both countries report, CIS (EI) has been ahead every year.
CIS (EI) ranks 2nd and Iran ranks 5th of 2 groups.
CIS (EI) has averaged higher in every one of the 7 decades both report.
Head to head by decade
| Decade | CIS (EI) | Iran | Difference | Ahead |
|---|---|---|---|---|
| 1960s | 1,481 terawatt-hours | 8.91 terawatt-hours | 1,472 terawatt-hours | CIS (EI) |
| 1970s | 2,712 terawatt-hours | 40.03 terawatt-hours | 2,672 terawatt-hours | CIS (EI) |
| 1980s | 4,525 terawatt-hours | 91.27 terawatt-hours | 4,434 terawatt-hours | CIS (EI) |
| 1990s | 4,743 terawatt-hours | 332.77 terawatt-hours | 4,410 terawatt-hours | CIS (EI) |
| 2000s | 4,910 terawatt-hours | 959.69 terawatt-hours | 3,950 terawatt-hours | CIS (EI) |
| 2010s | 5,447 terawatt-hours | 1,794 terawatt-hours | 3,653 terawatt-hours | CIS (EI) |
| 2020s | 5,912 terawatt-hours | 2,437 terawatt-hours | 3,475 terawatt-hours | CIS (EI) |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher fossil fuel supply by source, CIS (EI) or Iran?
- CIS (EI), at 6,153 terawatt-hours against 2,563 terawatt-hours in Iran as of 2025.
- What is the difference in fossil fuel supply by source between CIS (EI) and Iran?
- 3,590 terawatt-hours, with CIS (EI) ahead.
- How many years of comparable data are there for CIS (EI) and Iran?
- 61 years are reported by both, from 1965 to 2025.
- How do CIS (EI) and Iran rank globally for fossil fuel supply by source?
- CIS (EI) ranks 2nd and Iran ranks 5th of 2 groups.
- Where does this data come from?
- Energy Institute - Statistical Review of World Energy (2026); Smil (2017) β with major processing by Our World in Data, published as Fossil fuel supply 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.