Cash Conversion Cycle Calculator
Sixty-two days sounds like an efficiency metric. It is a queue: sixty-two days of your own money standing in line between paying a supplier and being paid by a customer. This page converts that queue into dollars, because days are only useful once you know what one is worth — and a day of receivables and a day of inventory are not worth the same amount.
| Building the cycle | Days | What it is |
|---|---|---|
| Days inventory outstanding (DIO) | — | — |
| Days sales outstanding (DSO) | — | — |
| Days payable outstanding (DPO) | — | — |
| Cash conversion cycle | — | — |
| Where the money actually sits | Amount |
|---|---|
| Inventory at cost | — |
| Receivables | — |
| Less supplier payables | — |
| Net cash tied up in the cycle | — |
| Cost of carrying it for a year | — |
| Gross margin implied by your inputs | — |
| One day off each lever | Cash per day | Days to free $10,000 |
|---|---|---|
| Receivables (DSO) | — | — |
| Inventory (DIO) | — | — |
| Supplier terms (DPO) | — | — |
| Same 10-day improvement, three different levers | New cycle | Cash freed | Carrying saved / yr |
|---|
| Inventory turns | DIO | Inventory at cost | Carrying cost / yr |
|---|
| If sales change by | Net cash tied up | Cash released / (absorbed) |
|---|
62.5 days is a queue, and you are standing in it
At the default figures the cycle breaks down like this. Every number below is the same arithmetic the calculator runs, applied to a business doing $730,000 of revenue on $438,000 of cost:
| Stage | Balance | Days | How it is calculated |
|---|---|---|---|
| Inventory sits | $60,000 | 50.0 | 365 × 60,000 ÷ 438,000 |
| Customers owe you | $100,000 | 50.0 | 365 × 100,000 ÷ 730,000 |
| You owe suppliers | $45,000 | 37.5 | 365 × 45,000 ÷ 438,000 |
| Cash conversion cycle | — | 62.5 | 50.0 + 50.0 − 37.5 |
Note the two denominators. Inventory and payables divide by cost, receivables divide by revenue. That is not a stylistic choice — inventory is carried at cost, so it has to be compared against cost, and a receivable is a claim on the selling price, so it has to be compared against revenue. Dividing inventory by revenue instead is the single most common spreadsheet error here, and it makes the inventory days look better than they are by exactly the gross margin.
Seen from the balance sheet, the queue is $115,000 of your money: 60,000 of stock plus 100,000 owed to you minus 45,000 you still owe. At an 8% cost of capital, standing in that queue costs $9,200 a year — real, recurring, and invisible in a P&L that only shows the interest line if you actually borrowed.
A day of receivables is worth 1.67 days of inventory
This is the part most people get wrong when they treat the cycle as a single number to shorten. The three levers are not interchangeable, because they are denominated in different things:
| Lever | One day is worth | Days needed to free $10,000 |
|---|---|---|
| Receivables (DSO) | $2,000 — one day of revenue | 5.0 |
| Inventory (DIO) | $1,200 — one day of cost | 8.3 |
| Supplier terms (DPO) | $1,200 — one day of cost | 8.3 |
So here is the trap. Take ten days off any one of the three levers and the cycle lands on 52.5 days in all three cases. The cash does not:
| Improvement | New cycle | Cash freed | Carrying saved / yr |
|---|---|---|---|
| Cut 10 days of DSO | 52.5 | $20,000 | $1,600 |
| Cut 10 days of DIO | 52.5 | $12,000 | $960 |
| Add 10 days of DPO | 52.5 | $12,000 | $960 |
Identical days, $8,000 of difference. Chasing receivables is worth 67% more per day than chasing stock, at this margin. The multiplier is 1 ÷ (1 − gross margin), so it widens as you get more profitable:
| Gross margin | One DSO day is worth this many DIO days |
|---|---|
| 20% | 1.25× |
| 30% | 1.43× |
| 40% | 1.67× |
| 50% | 2.00× |
| 60% | 2.50× |
At 60% margin a day of receivables is worth two and a half days of inventory. Which means a business that reports "we took ten days off the cycle" has told you almost nothing until it says which ten.
Do all three levers and the arithmetic compounds: ten days off inventory, ten off receivables, ten onto payables takes the cycle from 62.5 to 32.5 and frees $44,000 once, plus $3,520 a year in carrying cost. That is roughly half a year of gross profit at this scale, which is why the cycle is worth more attention than most sellers give it.
Stretching supplier terms is a loan, and it has an interest rate
Adding ten days of DPO freed $12,000 in the table above. It looks free because the cost does not appear on any invoice. It is not free: suppliers price the credit. The implied annual rate is just the price increase divided by the extra time, annualised:
implied APR = price increase % × 365 ÷ extra days
| Days added | For 0.5% higher price | For 1% higher price | For 2% higher price |
|---|---|---|---|
| 10 | 18.3% | 36.5% | 73.0% |
| 15 | 12.2% | 24.3% | 48.7% |
| 20 | 9.1% | 18.3% | 36.5% |
| 30 | 6.1% | 12.2% | 24.3% |
| 45 | 4.1% | 8.1% | 16.2% |
| 60 | 3.0% | 6.1% | 12.2% |
Read the row that matters: 1% higher price for 15 extra days is 24.3% a year. Compare that against whatever you would pay to borrow — a credit line, a merchant cash advance, a card. If your borrowing cost is below the implied rate in this table, taking the longer terms is the expensive way to get the money, and the supplier is running a lending business at your expense.
The familiar version of this arithmetic is a 2/10 net 30 term: 2% off if you pay in 10 days. Skipping that discount to pay on day 30 means paying 2% for 20 extra days — 36.5% a year. Almost every seller who "takes the full terms for cash flow" is turning down a 36% return.
There is a second cost that does not annualise: supplier concentration. Terms are extended by a supplier who can withdraw them. A business whose cycle depends on 60-day terms is one credit review away from a 60-day hole in its cash, and that risk does not appear anywhere in these formulas.
A negative cycle is leverage, not a moat
When DPO exceeds DIO plus DSO the cycle is negative, which means customers and suppliers are funding you. This gets written up as a structural advantage, and while you are growing it is one. It also reverses.
Take a second business: same revenue and cost, $20,000 of inventory, no receivables at all because it sells for cash, and $60,000 of supplier payables. DIO 16.7, DSO 0.0, DPO 50.0, cycle −33.3 days, turns 21.9. Net cash tied up is −$40,000: forty thousand of other people's money is working in the business.
| Sales change | Positive cycle (62.5 days) | Negative cycle (−33.3 days) |
|---|---|---|
| −30% | releases $34,500 | absorbs $12,000 |
| −10% | releases $11,500 | absorbs $4,000 |
| +10% | absorbs $11,500 | releases $4,000 |
| +30% | absorbs $34,500 | releases $12,000 |
| +50% | absorbs $57,500 | releases $20,000 |
The sign flips. Growing a negative-cycle business hands you cash; shrinking one takes cash back — $12,000 on a 30% decline, at exactly the moment revenue is already falling. That is the mechanism behind a specific and common failure: a business reports an excellent cycle, loses a major customer, and cannot pay wages, because the "efficient" cycle was a loan sized to a volume that no longer exists.
The practical reading is not "negative is good" but "the cycle is a lever whose direction depends on which way sales are going". If you expect to shrink — a discontinued line, a lost channel, a deliberate exit from a low-margin product — plan the cash repayment before you place the last order.
Inventory turns on their own tell you nothing
Turns are the most quoted and least informative of these numbers, because they are only comparable inside one category and they hide the two things that matter: what a turn is worth in cash, and what it costs you to raise it.
| Inventory turns | DIO | Inventory at cost | Carrying cost / yr at 8% |
|---|---|---|---|
| 4 | 91.3 days | $109,500 | $8,760 |
| 6 | 60.8 days | $73,000 | $5,840 |
| 8 | 45.6 days | $54,750 | $4,380 |
| 10 | 36.5 days | $43,800 | $3,504 |
| 12 | 30.4 days | $36,500 | $2,920 |
| 15 | 24.3 days | $29,200 | $2,336 |
Going from 6 to 10 turns frees $29,200 of cash outright and $2,336 a year in carrying cost. Going from 10 to 15 frees another $14,600 and $1,168 a year. The second move is half as valuable as the first, and it is much harder — which is the general shape of inventory improvement: the easy turns sit in the slow movers, and the expensive ones sit in the products you cannot afford to be out of.
That is also where turns and the reorder point pull against each other. The reorder point calculator works out the buffer that keeps service levels intact; this page prices the cash that buffer consumes. Raising turns by cutting the buffer is not free — it is a trade you are making between carrying cost here and stockout cost there, and the two pages use the same inputs deliberately so you can run both.
Where this model stops working
Average balances over a period, divided by an annual flow, assume a business that is roughly steady. These are the cases where the output is arithmetic but not truth:
- Seasonal businesses. Average inventory across a year blends a December peak with a February trough and describes neither. Compute the cycle for the peak quarter and the trough quarter separately; the peak is the one that needs financing.
- Deposits and staged payments. Prepayments and milestone billing sit in neither receivables nor payables in the way this model assumes. A 50% deposit before production shortens the real cycle dramatically and the formula will not show it.
- Marketplace settlement. Amazon and Etsy hold funds on a rolling reserve and then pay out on a schedule. That delay is real DSO even though no customer owes you anything in the invoicing sense, so the receivables input has to include funds held by the platform, not just invoices you issued.
- Returns and chargebacks. Returned goods re-enter inventory and reverse revenue, sometimes a month later. In a high-return category the reported cycle flatters the business, because the inventory coming back is not in the average yet.
- Mostly cash sales. If nearly everything settles at the point of sale, DSO is close to zero and the formula is still correct, just uninformative — the lever you can pull is inventory and terms, not collections. Do not read a very short DSO as evidence of good collection discipline.
- Cash versus accrual accounting. Every input here is an accrual balance. A business that records revenue when cash arrives will compute a cycle near zero and learn nothing.
- Growth inside the period. Average balances lag a growing business, so a fast-growing seller's computed cycle looks better than the marginal cycle on the next order — which is the one that needs funding.
Frequently asked questions
My cycle is 62 days and my competitor's is 40. Am I badly run?
Not necessarily — you may be selling different things. A business importing from overseas with 45-day production and 30-day transit cannot have a 40-day cycle without holding almost no stock, and holding no stock in that setup means stockouts, not efficiency. Compare the components instead: if your DIO is 50 and theirs is 20, that is a real gap worth investigating. If your DPO is 37.5 and theirs is 60, you are financing the same operation with more of your own money, and that is a negotiation, not an operational failure.
Should accounts payable divide by cost of goods sold or by revenue?
Cost of goods sold. Payables settle purchases, and purchases are recorded at cost. If you divide by revenue you understate DPO by the gross margin multiple — at 40% margin, a true DPO of 37.5 days shows up as 22.5, and the cycle looks 15 days worse than reality. The rule is simple once you see why: compare a cost-denominated balance against cost, and a price-denominated balance against price.
Does paying suppliers early ever make sense?
Yes, when the discount is large relative to the time. The threshold is the implied annual rate: a 2% discount for paying 20 days early is a 36.5% annual return, which almost always beats borrowing. A 1% discount for paying 10 days early is 36.5% too. A 0.5% discount for 5 days is also 36.5% — the arithmetic is scale-free, so the only question is whether the rate beats your cost of capital. Compare it against the table above and the answer is usually obvious.
How do I improve DSO when my customers are marketplaces I cannot invoice?
You cannot shorten a platform's payout schedule by asking, so the levers are structural: pick the faster payout option even when it costs a fee, hold a multi-currency account so settlement does not add correspondent banking days, and stop shipping on terms you cannot enforce. The comparison to make is the fee against the value of the days — at a 40% margin, five days of DSO here is $10,000 of cash, and a 1% payout fee on $730,000 is $7,300 a year. Run both numbers before deciding the fee is too expensive.
Why does my cycle change so much month to month?
Because it is built from average balances divided by an annualised flow, and both move. A single large inventory buy inflates the numerator; a strong sales month inflates the denominator and flatters every ratio at once. Use a rolling three-month average for the balances and a trailing twelve-month figure for revenue, or you will spend your time reacting to noise. If the cycle genuinely swings with the season, track the peak quarter separately instead of averaging it away.
Is the cash tied up here the same as my working capital?
Close but not identical. Net cash tied up — inventory plus receivables minus payables — is the operating part of working capital, which is usually what a seller means by the term. Full working capital also includes cash balances, short-term investments, accrued expenses, tax liabilities and the current portion of debt. The operating core is the part you can actually change with the levers on this page, which is why it is the part worth measuring separately.
Last reviewed: October 2026. Uses average balances over the period and annualised flows; assumes steady-state operations and excludes deposits, staged payments, returns in transit, seasonality and growth within the period, all covered under the limitations above. Figures are arithmetic on your inputs, not a forecast.