One night in a hotel room produces roughly 5 to 100+ kilograms of CO2 equivalent, and the spread is enormous: industry benchmarking data puts an efficient room in Costa Rica at around 4.7 kg CO2e per room-night, a typical UK room at about 10.4 kg, and a room in the Maldives at roughly 152 kg. The single biggest driver is not where you sleep but how the building gets its energy. The figures below come from the Cornell Hotel Sustainability Benchmarking (CHSB) Index and the linked Hotel Footprinting Tool, the most widely used datasets for this question, plus the Hotel Carbon Measurement Initiative (HCMI) methodology that standardises how a "per room-night" number is calculated.
By the IMPT Hotels editorial team · Updated 2026-05-29
There is no single global figure for a hotel night, because two rooms of identical size can differ by 30x depending on the electricity grid behind the wall socket. The most authoritative source is the Cornell Hotel Sustainability Benchmarking (CHSB) Index, which aggregates operational data from tens of thousands of properties worldwide. The 2023 release alone covered 25,576 hotels across 31 hotel groups in 64 countries, and the dataset feeding today's tools is larger still. Cornell's data is what powers the public Hotel Footprinting Tool, so the per-night estimates you see in carbon calculators trace back to the same benchmark.
When that data is expressed per room per night, the country-level differences are stark. Analysis of the Hotel Footprinting Tool's conversion factors found Costa Rica near the bottom at about 4.7 kg CO2e per room-night, the United Kingdom around 10.4 kg, and the Maldives at the top at roughly 152.2 kg. Costa Rica runs on a near-fully renewable grid; the Maldives runs largely on imported diesel and oil. Same product, same guest behaviour, radically different footprint.
Hotel class and intensity matter too. CHSB shows the top-performing quarter of hotels emit about 2.5 times less carbon than the bottom quarter on a like-for-like basis. Measured per square metre of floor area, the range runs from roughly 13.5 kg CO2e/m² in Norway to about 214.5 kg CO2e/m² in Hong Kong. A large luxury property with extensive air-conditioning, multiple pools, spa facilities and big banquet halls will always run heavier per guest than a lean, well-insulated budget hotel on a clean grid.
Energy dominates. Across the industry, on-site and purchased energy accounts for somewhere in the region of 60-70% of a typical hotel's carbon footprint, even though it represents only a few percent of operating cost. That energy goes to heating and cooling guest rooms and public spaces, water heating for showers and pools, lighting, lifts, kitchens, and 24/7 systems that run whether the room is occupied or not.
The internationally standardised way to express a hotel's per-night number is the Hotel Carbon Measurement Initiative (HCMI), developed by the hotel industry and the World Travel & Tourism Council. The CHSB-based footprint per occupied room deliberately scopes in the things a hotel directly controls: on-site energy and fuels (electricity, heating, hot water), outsourced laundry, and small standardised adjustments for vehicle fuel and refrigerant leakage. That is why laundry shows up in the headline figure while many other guest-driven impacts do not.
Food and beverage is the big number that usually sits outside the standard per-night figure. The HCMI rooms footprint deliberately excludes broader Scope 3 categories: food and drink, waste, the supply chain, guest air travel, and staff commuting. Those can be substantial. A hotel restaurant's meals, a buffet's food waste, and a flight to reach the destination can each rival or exceed the room's own energy footprint. So the honest framing is: the 5-150 kg per-night range covers the room itself, and a full trip footprint is typically larger once meals and especially flights are added.
The numbers below are drawn from the CHSB Index and the Hotel Footprinting Tool that builds on it. Use them as order-of-magnitude anchors rather than precise quotes for any individual property, because occupancy, season, and a hotel's own efficiency upgrades all move the result.
The clearest pattern in the data is decarbonisation of grids and operations over time. Between 2015 and 2018 the industry's carbon intensity fell about 10% overall, with UK hotels cutting roughly 23.4%, India 14.4% and Canada 13.6%, and energy intensity has continued to decline a few percent per year since. The direction of travel is downward, which means older estimates tend to overstate today's footprint, especially in markets that have cleaned up their electricity.
Once you know a night is, say, 10-30 kg CO2e for a mid-range stay, the offsetting question becomes simple arithmetic: how many tonnes, and at what quality. Most hotel nights fall well under one-tenth of a tonne. A 20 kg night is 0.02 tonnes of CO2e, so it takes 50 such nights to make up a single tonne. That framing matters because carbon credits are priced and retired in tonnes.
Price depends entirely on credit type and integrity. In the voluntary carbon market, nature-based avoidance projects commonly trade in the region of €8-25 per tonne, nature-based removals such as afforestation or biochar around €30-150 per tonne, and engineered permanent removals (direct air capture, enhanced mineralisation) from €150 to €400+ per tonne. At those ranges, offsetting a single 20 kg night costs anywhere from a few cents to several euros depending on the standard of credit chosen. Very cheap offsets generally signal lower-integrity projects.
Quality is where most of the value sits. The credible floor is certification to a recognised standard such as the Verra Verified Carbon Standard or the Gold Standard, which require independent validation and verification. The stronger tier adds approval under the Integrity Council for the Voluntary Carbon Market's Core Carbon Principles and an independent rating (Sylvera, BeZero or Calyx) in the top band. Offsetting should also come second to reduction: the most defensible approach is to lower the footprint first (efficient buildings, clean energy, fewer flights) and offset only the residual with high-integrity, verified credits.
This is the model IMPT Hotels is built around: bookings are made at the same price as booking direct, and a portion of each booking funds verified climate projects certified to standards including the Verra Verified Carbon Standard and the Gold Standard, so the residual footprint of a stay is addressed with credits that meet recognised integrity criteria rather than the cheapest available.
Most of a hotel night's carbon is decided before you check in, by the building and its grid. But guest choices and booking decisions still move the needle, and they compound across a trip.
The highest-leverage decision is usually destination and travel mode rather than the hotel itself: a long-haul flight typically dwarfs the room's per-night energy footprint, so choosing closer destinations or staying longer per flight cuts the trip total more than any in-room habit. After that, look for properties with credible third-party sustainability certification and clear energy data, favour hotels in markets with cleaner grids, and use the simple in-room levers that reduce energy and laundry demand.
Same price as booking direct — and a share of your booking funds verified climate projects (Verra VCS & Gold Standard).
Find carbon-neutral hotels →There is no single global average, because grid electricity varies so much by country. Benchmark data from the Cornell Hotel Sustainability Benchmarking Index and the Hotel Footprinting Tool puts a typical mid-range room-night somewhere between roughly 5 and 30 kg CO2e, with efficient rooms on clean grids near 5 kg (e.g. ~4.7 kg in Costa Rica) and energy-intensive rooms on fossil grids well over 100 kg (e.g. ~152 kg in the Maldives).
No. The standard Hotel Carbon Measurement Initiative (HCMI) per-room figure scopes in on-site energy, hot water, and outsourced laundry, but deliberately excludes food and beverage, waste, the supply chain, and guest transport. Those are often large — especially flights — so a full trip footprint is typically bigger than the room number alone.
The dominant factor is the electricity grid. A room on a renewable-heavy grid (such as Norway or Costa Rica) can emit a fraction of an identical room on a diesel- or coal-heavy grid. CHSB data also shows the top quarter of hotels emit about 2.5 times less than the bottom quarter through better insulation, efficient HVAC, and on-site renewables.
A typical night of 10-30 kg CO2e is 0.01-0.03 tonnes. At voluntary-market prices — roughly €8-25 per tonne for nature-based avoidance, €30-150 for nature-based removals, and €150-400+ for engineered removals — offsetting one night ranges from a few cents to a few euros, depending on the integrity of the credit. Credits certified to the Verra Verified Carbon Standard or Gold Standard are the credible baseline.
The main source is the Cornell Hotel Sustainability Benchmarking (CHSB) Index, which aggregates operational data from tens of thousands of hotels (over 25,000 in its 2023 release across 64 countries) and feeds the public Hotel Footprinting Tool. The per-night methodology follows the Hotel Carbon Measurement Initiative (HCMI).