List each utility bill for the period with the share genuinely attributable to guest rooms rather than kitchens, common areas or offices, and enter your occupied and total available room-nights. The tool works out your true energy cost per occupied room-night and per available room-night.
| Utility | Total Bill | % Allocated to Rooms | Room-Allocated Cost |
|---|
Unless rooms are sub-metered separately, the room allocation share for each bill will always be an estimate. Base it on floor area, historic patterns, or a period of manual monitoring where practical, and revisit it if you change equipment or room mix.
Heating, hot water and common area lighting often continue regardless of how many rooms are occupied. This is why cost per available room-night tends to be the more revealing figure during quiet periods, even though cost per occupied room-night is what's usually quoted.
Utility cost per room-night can vary considerably between a cold, quiet winter month and a warm, busy summer one. Track this figure across several periods rather than treating any single month as representative.
Because utility cost is spread across every room-night, a modest reduction in overall consumption, from thermostat controls, LED lighting or appliance upgrades, shows up clearly here even before it shows up as a dramatic saving on the bill itself.
This calculator provides estimates based on the figures you enter. JWBIZ Ltd accepts no liability for cost or budgeting decisions made on the basis of this tool.