Strangely, it depends on the size of the restaurant and how many meals are made daily/how many customers are served. Same goes for motels/hotels, size of the b

Strangely, it depends on the size of the restaurant and how many meals are made daily/how many customers are served. Same goes for motels/hotels, size of the building/number of bathrooms and number of people staying there affects the result. Some rule of the thumb can be used based on water consumption however, if you have (for the restaurant) a separate metering device for the bathrooms. For the restaurant (bathrooms only, not including water used for the kitchen and dish washing) 1 meter of toilet paper every 20 liters. For the motel/hotel 1 meter of toilet paper every 60 liters.