What this calculator does
The Restaurant Monthly Sales Forecast Calculator gives a quick, idealized estimate of how much revenue a restaurant could generate in one month. It multiplies four planning inputs: the number of seats, how many times each seat is filled per day (seat turnover), the number of operating days in the month, and the average amount each customer spends. The currency is whatever you enter for average spend, so the tool works for any country or currency unit.
How to use it
Enter your seating capacity, an estimated seat turnover per day, the days you plan to open that month, and a realistic average spend per customer. The calculator returns your projected monthly sales, rounded to the nearest whole currency unit, plus the implied customers per day and sales per day. Non-whole values such as a turnover of \(3.5\) are allowed.
The formula explained
$$\text{Monthly Sales} = \text{Seats} \times \text{Turnover per day} \times \text{Operating days per month} \times \text{Average spend per customer}$$ The logic is layered: \(\text{seats} \times \text{turnover}\) gives daily customers; \(\text{daily customers} \times \text{average spend}\) gives daily sales; \(\text{daily sales} \times \text{operating days}\) gives the month total.
Worked example
With 20 seats, a turnover of 4 per day, 25 operating days, and an average spend of 800: $$\text{daily customers} = 20 \times 4 = 80$$ $$\text{daily sales} = 80 \times 800 = 64{,}000$$ $$\text{monthly sales} = 64{,}000 \times 25 = 1{,}600{,}000$$ The projected monthly sales is \(1{,}600{,}000\).
FAQ
Is this an exact prediction? No. It assumes every seat turns over the full number of times every day, so it is an upper-bound planning estimate. Actual sales depend on occupancy rate, peak versus off-peak periods, and seasonality.
What is seat turnover? It is how many separate parties occupy a single seat during one business day. A turnover of 4 means each seat serves four customers across the day.
Can I use any currency? Yes. The output uses the same currency unit you enter for average spend per customer.
