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Cash Conversion Cycle Calculator

How many days from a dollar going out — paying for inventory or production — to that dollar coming back as cash from a customer? That's the cash conversion cycle. Lower is better; negative is exceptional. The calculator surfaces your CCC plus the three underlying components, and tells you which one is the constraint.

Not sure where to find these numbers in your books? See where to find them in QuickBooks, Wave, or your accountant's report.

Choose an industry to see how your numbers compare to typical businesses like yours.

Top-line sales for the year. Used to compute DSO.

Cost of goods sold for the year. Used to compute DIO and DPO.

Average AR balance during the year.

Average inventory during the year. Use 0 for service businesses.

Average AP balance during the year.

Fill in the inputs above to see your cash conversion cycle.

What CCC actually measures

CCC measures how long working capital is tied up in the operating cycle. Every dollar that goes out — to suppliers, to inventory, to production — eventually comes back as cash from a customer. The question is: how many days is that dollar locked up in the cycle?

Shorter cycle = less working capital required to run the business. A 30-day CCC means you need roughly 30 days of revenue funded somehow — either from operating cash, a line of credit, or owner-financed working capital. A 90-day CCC means three times that.

Lengthening CCC is one of the silent killers of small business cash flow. Revenue can be growing while cash is getting tighter — usually because AR is aging or inventory is bloating faster than sales. CCC catches this before the P&L does.

The formula

CCC = DSO + DIO − DPO

Where:
  DSO = Days Sales Outstanding   = (AR / Revenue) × 365
  DIO = Days Inventory Outstanding = (Inventory / COGS) × 365
  DPO = Days Payables Outstanding  = (AP / COGS) × 365

The intuition: DSO is how long it takes to collect from customers. DIO is how long inventory sits on the shelf or in production. DPO is how long you take to pay suppliers. Add the first two, subtract the third, and you have the net days of cycle the business is funding.

A worked example

A small manufacturing business with the following annual numbers:

  • Revenue: $1,000,000
  • COGS: $600,000
  • Average accounts receivable: $120,000
  • Average inventory: $100,000
  • Average accounts payable: $50,000

Computing each component:

DSO = ($120,000 / $1,000,000) × 365 = 43.8 days

DIO = ($100,000 / $600,000) × 365 = 60.8 days

DPO = ($50,000 / $600,000) × 365 = 30.4 days

CCC = 43.8 + 60.8 − 30.4 = 74 days

For a manufacturer, 74 days is well within healthy range (typically 50-110). The driver is DIO at 61 days — meaning inventory is the largest contributor to the cycle. If the business wanted to free up working capital, the highest impact lever is inventory turnover.

The three components, and why each one matters separately

DSO (Days Sales Outstanding)

How long it takes to collect from customers. Lower is better — fewer days of AR means cash arrives faster. Industry typical varies enormously: retail and restaurants collect at the till (DSO near zero); B2B services run 30-50 days; construction often runs 50-70 days because of net terms and retainage.

The lever for DSO is collection discipline: invoice on completion not month-end, follow up at 15 and 30 days, enforce payment terms, and stop tolerating chronic slow-payers as a category.

DIO (Days Inventory Outstanding)

How long inventory sits before being sold. Lower is better, with the caveat that going too low risks stockouts. Service businesses run near zero. Manufacturing runs 50-100 days typical. Retail varies widely by category — fast-fashion turns in 30 days, jewelry in 6+ months.

The lever for DIO is inventory discipline: reorder triggers tied to actual sell-through rates rather than historical averages, markdown analysis on slow-moving SKUs, vendor consignment arrangements, and just-in-time ordering where the supply chain supports it.

DPO (Days Payables Outstanding)

How long you take to pay suppliers. Higher is better, up to a point. Stretching DPO uses supplier financing — they fund your working capital while you wait to pay. But pushed too far, it damages supplier relationships and limits what they'll do for you when you need flexibility.

The lever for DPO is supplier terms negotiation: net-30 should be a minimum, net-45 or net-60 is achievable for established customers in most industries. Don't pay early unless there's a documented discount worth more than your cost of capital.

Why "the primary driver" matters more than the headline

Two businesses can have identical CCC numbers but completely different working-capital stories. A retailer with 5-day DSO, 90-day DIO, and 35-day DPO has a 60-day CCC driven by inventory. A B2B services business with 60-day DSO, 0-day DIO, and 0-day DPO also has a 60-day CCC — but driven entirely by AR collection. Same number, totally different actions.

The calculator above identifies the primary driver automatically and surfaces the lever-specific actions for your situation. That's the part that matters more than the headline number.

Negative CCC — exceptional, and worth understanding

Some businesses run negative CCC: they collect from customers before paying suppliers. This is exceptional. The classic examples are Amazon, well-run quick-service restaurants, and software businesses with annual upfront billing.

Negative CCC means the business is funded by its operating cycle rather than tying up working capital in it. Each new dollar of revenue contributes to operating cash before it requires any working capital investment. Growth is self-funding.

For most owner-operated businesses, getting to negative CCC is impractical because of industry structure. But getting CCC closer to zero — by tightening DSO, accelerating inventory turn, and stretching DPO — frees up cash that would otherwise need to come from a line of credit or owner contribution.

CCC and your line of credit

The reason CCC matters in concrete dollar terms: it determines how big a line of credit you need. Working capital required ≈ daily revenue × CCC. A business with $5,000 a day in revenue and 60-day CCC needs roughly $300,000 in working capital floating in the operating cycle at any time.

Cutting CCC from 60 days to 40 days releases $100,000 of that — cash that can either reduce LOC borrowings, fund growth, or pay distributions. This is the bottom-line impact of working capital management.

Common mistakes

  1. Using period-end balances instead of averages. AR, inventory, and AP fluctuate during the year. Using the December 31 snapshot misses seasonal swings. Use trailing-12-month averages where possible.
  2. Confusing DPO with payment-on-time performance. DPO measures average days to pay across the AP balance. It includes both invoices paid on time and invoices paid late. A high DPO can mean "we negotiated long terms" or "we're late on payments" — those are very different conditions.
  3. Optimizing DPO at the expense of supplier relationships. Pushing DPO too far damages relationships and limits flexibility. The right target is industry-typical or modestly above, not maximum.
  4. Ignoring the components and just tracking the aggregate. CCC is meaningful only with the sub-ratios. A "60-day CCC" tells you nothing about which lever to pull.
  5. Comparing across industries. A 30-day CCC for a manufacturer is exceptional; for a restaurant it would suggest something is wrong. Always compare to industry-typical zones, not generic targets.
  6. Using CCC as the only working-capital metric. CCC is a flow measure. Pair it with current ratio (a stock measure of liquidity) for the full picture.

FAQ

What's a "good" cash conversion cycle?

Industry-dependent. There's no universal target. Manufacturing businesses run 50-110 days typically; retail 25-70; services 5-35; restaurants near zero or negative. The calculator above uses industry-specific zones — comparing your CCC to a generic "60 days is good" rule will mislead you in either direction.

Should I use AR/Revenue or AR/Daily Sales for DSO?

Mathematically equivalent — daily sales is just revenue divided by 365. The formula above uses (AR / Revenue) × 365 because most P&L data is annual. Some texts present it as AR ÷ (Revenue/365), which is the same calculation.

What if I don't hold inventory?

Service businesses with no inventory have DIO = 0, so CCC = DSO − DPO. Use 0 as the inventory input. The interpretation will surface DSO and DPO as the relevant levers.

How often should I recompute CCC?

Quarterly minimum, monthly if cash flow is tight or the business is growing fast. The most useful read is the trend — is CCC lengthening or shortening? Lengthening CCC while revenue grows is a classic warning sign that growth is consuming working capital faster than it's generating cash.

Does CCC include taxes, accruals, or other balance sheet items?

The standard CCC formula uses only AR, inventory, and AP. Other working capital items (prepaid expenses, accrued liabilities, deferred revenue) aren't included. Some analysts compute extended versions including these items; the standard version is what bankers and most textbooks use, and what this calculator computes.