Debtor days

The debtors days ratio measures how quickly cash is being collected from debtors. The longer it takes for a company to collect, the greater the number of debtors days. Debtor days can also be referred to as debtor collection period. Another common ratio is the creditors days ratio.

Definition
$$\mbox{Debtor days} = \frac {\mbox{Year end trade debtors}} {\mbox{Sales}} \times {\mbox{Number of days in financial year}}$$

or

$$\mbox{Debtor days} = \frac {\mbox{Average trade debtors}} {\mbox{Sales}} \times {\mbox{Number of days in financial year}} $$

when

$$\mbox{Average trade debtors} = \frac {\mbox{Opening trade debtors} + \mbox{Closing trade debtors}} {\mbox{2}} $$