Hotel ADR Calculator (Average Daily Rate)

ADR stands for average daily rate. STR (CoStar) defines it as "a measure of the average rate paid for rooms sold, calculated by dividing room revenue by rooms sold." The formula is ADR = Room revenue ÷ Rooms sold.

ADR isolates pricing. It tells you what a sold room earned on average and ignores the rooms that stayed empty. That is the difference between ADR and RevPAR: ADR divides by rooms sold, while RevPAR divides by rooms available, so RevPAR also reflects occupancy.

STR's rooms sold definition excludes complimentary rooms, so only paid room-nights belong in the denominator. Only room revenue belongs in the numerator: food, spa, parking and other operating income sit outside ADR and belong under total revenue instead.

1. Choose a currency (EUR, USD or GBP) from the select at the top. This only changes the symbol shown in the result.
2. Enter Room revenue for the period and Rooms sold. The helper text under Rooms sold reminds you to count paid rooms only. Following STR's definition, complimentary rooms are excluded from rooms sold.
3. If you want to compare against your comp set, add a Competitive set ADR. This adds the Average Rate Index (ARI) to the result. Leave the field blank if you do not have that figure.
4. Read the result next to the form (below it on a phone). Numbers update as you type once the required fields are valid. Press "Calculate" to highlight missing or invalid fields, "Try an example" to load sample data, or "Clear" to reset every field.

You can type numbers with or without thousands separators, using either a decimal point or a decimal comma.

The result always shows ADR with the formula written out using your own figures, so you can trace the arithmetic. If you filled in a competitive set ADR, the calculator also shows your Average Rate Index (ARI), together with a short note saying whether it is above, at or below 100.

An ARI of 100 means, in STR's terms, you capture exactly your expected share of the group's ADR. A value above 100 means your average rate sits higher than the comp set aggregate; a value below 100 means it sits lower. The further the index moves from 100, the wider the gap.

To judge your own ADR over time, compare the same period year over year, watch the trend against your budget, and read the ARI alongside occupancy. A high ADR paired with weak occupancy can still leave revenue on the table, so read ADR together with occupancy.

• Counting complimentary rooms as sold: STR's rooms sold definition excludes complimentary rooms. Adding them to the denominator understates your ADR, because the same room revenue is spread across more room-nights.
• Mixing room revenue with total revenue: ADR uses only room revenue. Adding food and beverage, spa or parking income inflates the number and turns ADR into a mixed figure that no longer matches the STR definition.
• Ignoring empty rooms: ADR says nothing about how many rooms stayed unsold. A high ADR with low occupancy can still miss budget. Read ADR alongside occupancy, or use RevPAR.
• Switching revenue conventions midway: STR's glossary refers to its Data Reporting Guidelines for the detailed treatment of room revenue. If you report to STR, check those guidelines; whichever convention you follow, apply it consistently to every period.
• Comparing unlike periods: a slow shoulder month and a peak week can produce very different ADRs. Compare like with like, such as the same month last year, or track ADR by day of week and by segment to see where the mix moved.

ADR sits in a small family of hotel KPIs defined in the STR glossary. The identity RevPAR = ADR × Occupancy connects them: if you know any two of the three, you know the third. The RevPAR calculator works from either room revenue or from ADR and occupancy, and the occupancy rate calculator gives you the occupancy figure the identity needs.

Where ADR compares only your average rate, RevPAR compares your revenue per available room, and occupancy compares your fill rate. Each answers a different question: pricing, revenue capture, or demand. Reading them together, and reading each against the competitive set through its index, gives a fuller picture than any one of them alone.