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Slovenia Resource Reserves (2026)

2008

2023

Source: U.S. Energy Information Administration · Updated June 2026

2008

2023

What to know

As of 2023, coal dominated Slovenia's reserves at 104.7 million short tons recoverable. Over the last decade, coal reserves declined significantly (-74%).

Key reserves

Coal reserves (2023)

104.7 M ST

Key terms

Proved reserves: — Quantities of crude oil or natural gas that geological and engineering data demonstrate with reasonable certainty are recoverable under existing economic and operating conditions.
Recoverable reserves: — Coal that can be technically and economically extracted with current mining methods at current prices. Excludes inaccessible deposits.
Billion barrels (B bbl): — Unit for oil reserves. One barrel equals 42 US gallons or about 159 litres.
Trillion cubic feet (TCF): — Unit for natural gas reserves. One TCF is roughly 28.3 billion cubic metres.
Million short tons (M ST): — Unit for coal reserves. One short ton equals 2,000 lb or 907 kg.

Coal recoverable reserves

As of 2023, Slovenia's recoverable coal reserves totaled 104.7 million short tons. That declined significantly compared with a decade earlier (-74%).

The bottom line

Slovenia's reserve base was dominated by coal, the most carbon-intensive fossil fuel by energy content. Reserve estimates had trended lower, reflecting extraction outpacing new discoveries.

Source: U.S. Energy Information Administration · Updated June 2026

What to know

As of 2023, coal dominated Slovenia's reserves at 104.7 million short tons recoverable. Over the last decade, coal reserves declined significantly (-74%).

Key reserves

Coal reserves (2023)

104.7 M ST

Key terms

Proved reserves: — Quantities of crude oil or natural gas that geological and engineering data demonstrate with reasonable certainty are recoverable under existing economic and operating conditions.
Recoverable reserves: — Coal that can be technically and economically extracted with current mining methods at current prices. Excludes inaccessible deposits.
Billion barrels (B bbl): — Unit for oil reserves. One barrel equals 42 US gallons or about 159 litres.
Trillion cubic feet (TCF): — Unit for natural gas reserves. One TCF is roughly 28.3 billion cubic metres.
Million short tons (M ST): — Unit for coal reserves. One short ton equals 2,000 lb or 907 kg.

Coal recoverable reserves

As of 2023, Slovenia's recoverable coal reserves totaled 104.7 million short tons. That declined significantly compared with a decade earlier (-74%).

The bottom line

Slovenia's reserve base was dominated by coal, the most carbon-intensive fossil fuel by energy content. Reserve estimates had trended lower, reflecting extraction outpacing new discoveries.

Italy

Hungary

Austria

Croatia

What to know

Key reserves

Coal recoverable reserves

The bottom line

Italy

Hungary

Austria

Croatia

What to know

Key reserves

Coal recoverable reserves

The bottom line