ALOS Calculator – Average Length of Stay
Track Guest Stay Trends with ALOS.
Use this free ALOS calculator to understand how long guests stay on average — and make smarter decisions around pricing, promotions, and operations.
What is ALOS?
ALOS, or Average Length of Stay, is a hotel performance metric that shows how many nights guests typically stay at your property. It helps hoteliers understand booking patterns, guest behavior, and the balance between short stays and longer bookings.
By measuring ALOS, you can gain insights into the types of guests your property attracts and determine whether your marketing, rate structure, and minimum night rules are aligned with demand.
Whether you’re operating a resort with extended stays or a city hotel with high turnover, ALOS gives you the data needed to optimize your business strategy.
ALOS Formula
The formula for calculating ALOS is straightforward:
ALOS =
Total Room Nights
Total Number of Reservations
To use it, divide the total number of room nights occupied by the total number of reservations over a given period. For example, if your hotel sold 750 room nights across 250 reservations, the ALOS would be 3 nights.
This result means that, on average, guests stayed for 3 nights at your property. The higher the ALOS, the fewer check-ins and check-outs you need to manage, which can lead to lower operational overhead and more stable revenue per booking.
Why ALOS Matters for Hotel Performance
Knowing how long your guests typically stay can help you plan everything from staffing schedules to rate plans. A higher ALOS often reduces turnover costs and leads to more efficient operations, since longer-stay guests require fewer check-ins, check-outs, and room cleanings. It also means greater revenue per reservation and potentially more opportunities for upselling during the stay.
Conversely, a lower ALOS can be beneficial during periods of high demand when short stays allow for more turnover and higher nightly rates. By tracking ALOS consistently, hotels can make informed decisions about minimum night requirements, promotional offers, and the ideal booking mix for profitability and efficiency.
ALOS and Its Role in Hotel Strategy
ALOS is closely tied to rate strategy, revenue forecasting, and guest segmentation. If your property tends to attract short-stay guests, you may need to focus on high occupancy and dynamic pricing. If you see a rising ALOS trend, it may be time to create extended-stay packages or adjust operational resources to support longer-term guests.
ALOS also helps smooth out revenue projections, as longer stays can offer more predictable occupancy and spending patterns. When combined with metrics like ADR, RevPAR, and Occupancy Rate, ALOS rounds out a complete picture of how your property is performing and who your guests really are.
Make Length-of-Stay Work for You with Prostay
Prostay makes it easy to monitor your Average Length of Stay over time, compare guest behavior across seasons, and apply this data to your pricing strategy and marketing offers.
Whether you manage a high-turnover urban hotel or a luxury beachfront resort, Prostay gives you the tools to align guest behavior with operational goals. Built-in reports, visual trends, and dynamic rule settings help ensure that you’re always optimizing for both guest value and property efficiency.