Working Capital Calculator — Current Ratio + Quick Ratio

More working capital is not automatically better

A business watches current assets rise from $800,000 to $950,000 against unchanged liabilities of $500,000, so working capital climbs from $300,000 to $450,000. On paper, healthier.

Except the entire increase sits in receivables over 90 days old and inventory that is not moving. Customers are paying more slowly and stock is not turning. Cash has actually fallen. The balance sheet improved while the cash position deteriorated, and the single figure cannot distinguish the two.

This is the central thing to understand about the metric: a rising number is as often a symptom as a sign of health.

What the tool measures

Working capital is current assets − current liabilities, where current means expected to convert to cash or fall due within a year. The tool takes four inputs — current assets, current liabilities, and then cash and inventory as subsets of those assets — and returns four figures:

• Working capital — the amount, current assets less current liabilities.
• Current ratio — current assets ÷ current liabilities. The same comparison as a ratio, which makes it comparable across businesses of different sizes.
• Quick ratio — the same with inventory removed, on the basis that stock cannot be relied on to pay a bill next week.
• Cash ratio — cash alone against current liabilities. The harshest of the three, and the one that answers what you could settle immediately.

Reading the three ratios together is what surfaces the composition problem the opening example describes: a business can hold a comfortable current ratio and a poor cash ratio, and that gap is the finding.

Some businesses run negative by design

Negative working capital usually signals strain, but not always. A supermarket or a subscription business collects from customers before paying suppliers, so a negative position is structural efficiency rather than distress — they are funding operations with other people's money by design.

The distinction matters because the same number means opposite things depending on the model, which is another reason a target figure is not a useful thing to aim at.

Composition matters more than the total

Working capital of $500,000 held entirely as cash is a completely different situation from $500,000 made of $400,000 receivables + $100,000 inventory. Only one of them pays a supplier next week.

So read the figure alongside the aging of what is inside it. The receivables aging report shows whether the asset side is fresh or deteriorating, and payables aging shows how much of the liability side is already overdue. Growth concentrated in old receivables and slow inventory is the pattern that precedes a cash crisis while the headline number is still improving.

The snapshot problem

It is a balance-sheet figure at a single instant, so timing flatters it easily. A business that delays paying suppliers until just after the reporting date shows better working capital with nothing having improved — the obligation still exists, it simply fell outside the window.

Seasonal businesses swing enormously across the year, which makes one reading nearly meaningless unless you know where in the cycle it was taken. The useful practice is comparing the same point across years rather than consecutive quarters. Classifying items as current follows accounting standards, and an accountant should confirm the treatment — this is general business information, not accounting or financial advice.