Turns Per Day is a formula used to determine the health or efficiency of a laundromat overall and by individual washer types. By using TPD Calculator, you can monitor the health of your laundromat and monitor the performance of the different types of washer equipment in your establishment. You can use this data to help determine how your different types of washers impact your water usage. This information can also be valuable in helping reach the most efficient numbers of equipment. For example, if you have four 35 lb. washers with a TPD of 5.37 and ten top loaders with a TPD of 1.89, you may consider adding more 35 lb. machines and reducing your number of top loaders. Many people consider a TPD around 4.00 to be a fairly consistent average across America. We hope you enjoy TPD Calculator!