Cash Conversion Cycle: Find the Cash Trapped Inside Your Business
A profitable business can still run out of cash if its money is stuck in unsold inventory and unpaid invoices. The cash conversion cycle measures exactly how long your cash is trapped between paying for goods and collecting from customers. This calculator breaks it into its three drivers so you know precisely where to act.
How It Works: The Formulas
- DIO (Days Inventory Outstanding) = (Average inventory / COGS) × 365 — how long stock sits before selling.
- DSO (Days Sales Outstanding) = (Average accounts receivable / Revenue) × 365 — how long customers take to pay.
- DPO (Days Payable Outstanding) = (Average accounts payable / COGS) × 365 — how long you take to pay suppliers.
- CCC = DIO + DSO − DPO
The logic is intuitive: you wait for inventory to sell (DIO) plus wait for customers to pay (DSO), but you get to subtract the time you hold onto your suppliers' money (DPO).
A Worked Example
A company carries $50,000 in average inventory, $40,000 in receivables, and $30,000 in payables, on annual revenue of $500,000 and COGS of $300,000. DIO = ($50,000 / $300,000) × 365 = 60.8 days. DSO = ($40,000 / $500,000) × 365 = 29.2 days. DPO = ($30,000 / $300,000) × 365 = 36.5 days. The cycle is 60.8 + 29.2 − 36.5 = 53.5 days. That means cash is locked up for nearly two months on every dollar of sales — capital that could otherwise fund inventory, hiring, or marketing.
Why the Cycle Matters for Survival
Working capital is the cash you need just to keep operating day to day. The longer your cash conversion cycle, the more working capital you must hold (or borrow) to stay afloat — and the more vulnerable you are to a slow month. Shrinking the cycle by even ten days can release tens of thousands of dollars in a mid-size business, money that goes straight back into growth instead of sitting idle in stock and receivables.
Levers to Shorten Your Cycle
- Cut DIO: Order smarter, drop slow movers, and adopt just-in-time replenishment so stock turns faster.
- Cut DSO: Invoice the same day, offer small early-payment incentives, and follow up on overdue accounts systematically.
- Extend DPO: Negotiate net-45 or net-60 terms with suppliers — but never so far that you damage the relationship or lose discounts.
- Aim for negative: Subscription and marketplace models that collect upfront can push the cycle below zero, letting customers fund the business.
Run your balance sheet through this calculator each quarter. Watching the trend in DIO, DSO, and DPO tells you whether your operational discipline is improving long before it shows up in your bank balance.