The mirror image of this site’s accounts receivable turnover calculator — that one measures collection speed; this measures payment speed.
How it works
Total annual purchases divided by average accounts payable gives the number of times payables turn over in a year. Dividing 365 by that figure gives days payable outstanding — how many days, on average, a bill sits unpaid.
What this does not include
A rising DPO can mean a business negotiated better supplier terms, or it can mean the business is stretching payments because it’s short on cash — this calculator reports the number, not which explanation applies to a specific business.
How to use this calculator
- Enter total annual purchases (or cost of goods sold) and average accounts payable.
A worked example
$600,000 in purchases against $50,000 average accounts payable: turnover = 600,000 ÷ 50,000 = 12, or about 30.42 days to pay suppliers on average.
What the variables mean
| Variable | Meaning |
|---|---|
| Purchases | Total purchases on credit for the period |
| Average payable | Typical outstanding accounts payable balance |
Edge cases worth knowing
A higher turnover means paying suppliers faster, which isn’t automatically better. Paying too quickly can mean missing out on the cash-flow benefit of extended payment terms, while paying too slowly risks strained supplier relationships.
Zero average payable makes turnover undefined — there’s no outstanding balance to divide purchases by, so the calculator returns no result.
Frequently asked questions
Is a higher AP turnover better?
Not automatically — a higher turnover (faster payment) can mean strong cash position, but it can also mean a business isn’t using available supplier credit terms it’s entitled to.
How does this relate to the AR turnover calculator on this site?
They’re complementary — AR turnover measures how fast a business collects what it’s owed; AP turnover measures how fast it pays what it owes.
What’s a typical days payable outstanding?
It varies widely by industry and by the specific payment terms suppliers offer, so it’s most useful compared against a business’s own history or close industry peers.
