What we count
The volume of proved natural-gas reserves economically recoverable under current conditions.
Estimated remaining proved natural gas reserves
How much of the world's proved natural-gas reserves would theoretically remain if production continued at the 2025 rate.
Calculated at the 2025 production rate
WORLDRelated numbers in context
1,070,000,000,000latest published proved coal reserves
655,000,000people without access to electricity
2,000,000,000people relying on polluting cooking fuels
What lies behind this number
The volume of proved natural-gas reserves economically recoverable under current conditions.
How the source derives it
OPEC compiles the world total from nationally reported proved natural-gas reserves and marketed gas production under the consistent definitions used in its statistical bulletin.
What one number cannot show
This is not a date when gas will run out. Proved reserves change with discoveries, prices, technology and revisions, and future production need not remain constant.
Source value
The scenario begins with the reserve value from OPEC Annual Statistical Bulletin 2026 for reserves at 31 December 2025; 2025 world production.
How the value is used: The calculation shows a constant-production scenario, not a forecast of future development.
Starting reserves219,610,000,000,000m³
- Period
- reserves at 31 December 2025; 2025 world production
- Status
- published
- Primary data source
- OPEC Annual Statistical Bulletin 2026
How the number is calculated
We subtract an even share of the latest annual production rate from the starting reserve value.
Formula used
R(t) = R₀ − annual production × elapsed timeReference value219,610,000,000,000reserves at 31 December 2025; 2025 world production
Annual production−4,341,520,000,000m³ per year
Calculation interval0.1 sCalculated at the 2025 production rate
Source value
OPEC Annual Statistical Bulletin 2026 reports the latest published figure used on this page for reserves at 31 December 2025; 2025 world production.
Calculation method
We subtract an even share of the latest annual production rate from the starting reserve value.
Smooth display
The result is recalculated on screen every 0.1 seconds.
Where the data comes from
The source value comes from OPEC Annual Statistical Bulletin 2026 and refers to reserves at 31 December 2025; 2025 world production. It is the latest figure published by this source. OPEC compiles the world total from nationally reported proved natural-gas reserves and marketed gas production under the consistent definitions used in its statistical bulletin.
Latest published and verified source value
- Publisher
- OPEC Annual Statistical Bulletin 2026
- Data period
- reserves at 31 December 2025; 2025 world production
- Verified
- 13 August 2026
- Coverage
- Worldwide
- Use
- Constant-production scenario