Working Capital Cycle Calculator
Days of cash tied up between paying suppliers and collecting from customers.
Calculate the working capital cycle (DIO + DSO − DPO) — the number of days cash is tied up in operations before it returns.
What this tool does
Working capital cycle measures how many days of cash a business has tied up in operations — longer cycles starve cash, shorter cycles free it up. This calculator takes three inputs: Days Inventory Outstanding (how long inventory sits before sale), Days Sales Outstanding (how long to collect payment from customers), and Days Payable Outstanding (how long before paying suppliers). It returns the cash conversion cycle in days, showing the span between when cash leaves your business to pay for inventory and when cash returns from customer sales. A shorter cycle means faster cash flow; a negative result indicates payment arrives before outflow, reflecting strong supplier terms. The output illustrates operational cash dynamics for planning and comparison purposes and does not account for seasonality, payment terms variations, or non-operating cash movements.
Enter Values
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Formula Used
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Calculations or display — let us know.
Disclaimer
Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.
A typical retail business sits at 30 days inventory, 15 days to collect from customers, 40 days to pay suppliers — a 5-day cycle. Most manufacturers are closer to 90 days inventory, 45 days receivables, 60 days payables — a 75-day cycle that ties up a meaningful share of annual revenue in working capital at any given moment. A 30-day improvement across a 10m-revenue business frees up roughly 820,000 in cash.
How to use it
Enter your DIO (average days of inventory on hand), DSO (average days customers take to pay), and DPO (average days you take to pay suppliers). Use trailing 12-month averages for stability.
What the result means
Primary is the cash conversion cycle: DIO + DSO − DPO. Secondary rows show each component. A positive cycle means you fund operations from working capital; negative cycles (rare, mostly large retailers like Costco) mean you collect before paying suppliers — a big strategic advantage.
Levers to shorten the cycle
Faster inventory turnover, tighter customer payment terms or earlier collection, longer supplier terms (without damaging relationships). Each drops days off the cycle and frees cash. A 10-day reduction often funds growth without needing external finance.
Quick example
With days inventory outstanding of 30 and days sales outstanding of 15 (plus days payable outstanding of 40), the result is 5 days. Change any figure and watch the output shift — it's often more useful to see the pattern than to memorise the formula.
What's happening under the hood
Cash conversion cycle equals days inventory plus days receivables minus days payables. Shorter is better. Negative is possible — implies being paid before paying suppliers, a sign of strong bargaining power. The formula is listed in full below. If the number looks off, you can retrace the calculation by hand — that's the point of showing the working.
What to do with a low result
A disappointing result is information, not a judgement. Pick the single input that dragged the figure down most and focus the next quarter on that one factor. Breadth-first improvement rarely works; depth-first on the worst input usually does.
What this doesn't capture
The score is a composite of the inputs you provide. Life context — job security, family obligations, health, housing — doesn't appear in the math but shapes the real picture. Use the number as a prompt, not a verdict.
With 30 days inventory, 15 days to collect payment, and 40 days to pay suppliers, your working capital cycle is 5 days days.
Inputs
This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.
Sources & Methodology
Methodology
The calculator computes the cash conversion cycle by adding days inventory outstanding and days sales outstanding, then subtracting days payable outstanding. This models the number of days cash remains tied up between when a business pays suppliers and when it collects from customers. The computation assumes each component remains constant over the period measured and treats all days as equally weighted. The model does not account for seasonality, payment term variations, inventory turnover volatility, or changes in customer creditworthiness. A negative result indicates cash is collected before payment obligations arise, reflecting extended supplier terms relative to inventory and collection cycles.
References
Frequently Asked Questions
What's a good cycle?
How does this affect cash?
How do I reduce DSO?
Can the cycle be negative?
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