Days Sales Outstanding Calculator
Days sales outstanding (DSO) estimates how many days of credit sales are represented by average accounts receivable. Use figures for a consistent accounting period.
How to use this calculator
- Enter average receivables, net credit sales for the same period and the number of days in that period.
- Check the labels and units before applying the result to a real task.
- Change one input at a time when comparing scenarios.
Formula and method
DSO = average accounts receivable ÷ net credit sales × days in period
- DSO = average accounts receivable ÷ net credit sales × days in period
- Results depend on how credit sales, receivables and write-offs are recorded. Seasonal businesses may need average balances and more detailed analysis.
Worked examples
Worked example
Average receivables of 5,000 and net credit sales of 120,000 over 365 days.
DSO = 5,000 ÷ 120,000 × 365 ≈ 15.2 days.
DSO = 5,000 ÷ 120,000 × 365 ≈ 15.2 days.
Understanding the result
Days sales outstanding (DSO) estimates how many days of credit sales are represented by average accounts receivable. Use figures for a consistent accounting period.
Results depend on how credit sales, receivables and write-offs are recorded. Seasonal businesses may need average balances and more detailed analysis.
Important notes
Results depend on how credit sales, receivables and write-offs are recorded. Seasonal businesses may need average balances and more detailed analysis.
Displayed values are rounded for readability; retain appropriate precision when continuing a calculation.
Frequently asked questions
What does a lower DSO mean?
It means receivables represent fewer days of sales under the selected calculation. Whether that is good depends on credit terms, customer mix and collection policy.
Should I include cash sales?
The standard ratio uses credit sales, so cash sales should not be included in the sales denominator if they do not create receivables.
Can DSO be compared across industries?
Comparisons need caution because billing terms, business models, seasonality and accounting practices differ between industries.
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Related explanations
Learn the method behind the number or compare the terminology before using the calculator.
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This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.