Published on April 20, 2026 | 4 min read
Online gambling runs on electricity, and the question of how much is legitimate. The answer available from public data is narrower than the marketing suggests: the industry-wide figures are documented, the per-session figures are not, and any site offering you grams of carbon dioxide per spin has invented the number.
What follows is what can be established from published sources, what cannot be established at all, and which of the two the green badges on gambling sites are usually made of.
The documented part: data centres as a whole
The International Energy Agency puts global data centre electricity consumption at roughly 415 terawatt-hours in 2024, around one and a half per cent of world electricity demand, and expects it to rise substantially as computing demand grows. That is the solid ground: a sector-level figure from an organisation that publishes its method.
Online casino traffic is a small share of that total, sitting in the same general-purpose cloud and content-delivery infrastructure as everything else. Nothing in the public record isolates it, which is the first reason a per-spin number cannot be derived rather than asserted.
The part that cannot honestly be calculated
A per-session footprint would need three numbers that no operator publishes: the server-side energy drawn per user session, the share of shared infrastructure properly attributed to that session, and the carbon intensity of the grid serving the data centre at that hour. Without all three, any figure is a guess dressed as a measurement.
This is where the audit language on gambling sites tends to fail. A claim that a platform emits a specific percentage less carbon than its competitors requires a published baseline, a published boundary and a named auditor. If those three are absent, the percentage is decoration, however confidently it is stated — and across the online casino sector none of the three is normally available.
| Quantity | Published anywhere? | Consequence |
|---|---|---|
| Global data centre electricity | Yes — IEA, annually | Sector scale is known |
| Energy per casino user session | No | Per-spin figures cannot be derived |
| Grid carbon intensity by region | Yes — grid operators | Location matters more than software |
| Live studio energy use | No | Only the direction is arguable, not the amount |
| Operator offset baselines | Rarely | Most green claims are untestable |
Where the real differences actually sit
Two factors dominate anything a platform can claim about its code. The first is the electricity mix where the servers physically run: the same workload in a grid dominated by hydro and nuclear emits a small fraction of what it emits on a coal-heavy grid, and that single choice outweighs any software efficiency gain.
The second is the format of the game. An RNG table is a request and a response. A live-dealer table is a studio running lights, multiple cameras, continuous video encoding, bandwidth and staff around the clock. The direction of that comparison is not seriously in doubt, even though no operator publishes the figures that would let anyone quantify it.
What this means in practice
For a player, honestly, very little is in your hands, and the pages that suggest otherwise are selling a feeling. Your own device draws a few watt-hours an hour; the server side is not yours to influence. The one comparison that genuinely favours online play is the one nobody bothers to make — not travelling to a building that is lit, heated and staffed whether or not you arrive.
For an operator, the test is simple and almost nobody passes it: publish the location and grid mix of your infrastructure, the hours your live studios run, and the baseline behind any percentage you quote. Until those appear, treat a green badge on a gambling site as branding. This site has no energy figures for the operator behind this brand, and says so rather than filling the gap with an estimate.
The short version: the sector-level numbers are real and published, the per-spin numbers are not available to anyone, and the difference between those two statements is where most environmental claims in this industry live.
Frequently asked questions about the energy cost of online play
Is online gambling greener than visiting a casino?
Per session it is a reasonable inference, mainly because of travel and the building itself, but it is an inference rather than a measurement: the figures needed to compare them properly are not published.
How much energy does one spin use?
Nobody can say from public data. It would require per-session server energy, an attribution of shared infrastructure and the grid intensity at that hour, none of which operators disclose.
Do carbon-neutral badges on casino sites mean anything?
Only where the baseline, the boundary of what was counted and the auditor are published. Without those three a percentage or a badge cannot be checked, and unverifiable claims are worth nothing.
Are live-dealer games heavier than RNG games?
Almost certainly, since a studio runs lighting, cameras, encoding and staff continuously, but the size of the difference cannot be quantified from public information.
The sector figures and the method behind them: the IEA on data centres and data transmission networks.
The same insistence on checkable numbers runs through what a chip colour does and does not encode, how slot RNG is certified, how credit and comps are actually calculated and which session controls have evidence behind them.