Measure the cushion that funds a company's daily operations. Enter current assets and current liabilities for net working capital and the working capital ratio — add revenue to see it as a share of sales.
Answer first: working capital is the money a company has tied up in the day-to-day running of the business — what is left of its short-term assets after covering its short-term bills. This working capital calculator subtracts current liabilities from current assets to give net working capital, and divides one by the other for the working capital ratio.
Net working capital = Current assets − Current liabilities
Working capital ratio = Current assets ÷ Current liabilities
Example: $300M of current assets and $150M of current liabilities leaves net working capital of $150M and a ratio of 2.0. The company has twice the short-term assets it needs to meet its near-term obligations.
Working capital is the financial fuel of ongoing operations. Current assets — cash, receivables owed by customers, and inventory — are the resources being converted into sales. Current liabilities — bills to suppliers, wages, taxes and debt due within a year — are the claims coming due. Positive working capital means a company can comfortably fund its operating cycle and absorb bumps; deeply negative working capital can signal that a business may struggle to pay its bills as they fall due.
A working capital ratio (the same thing as the current ratio) between roughly 1.5 and 2.0 is often considered healthy for many industries: enough of a cushion to be safe, without so much idle capital that management is being lazy. Below 1.0 means current liabilities exceed current assets — a possible liquidity warning. But context is everything, and in one important case negative working capital is actually a sign of strength.
Some of the best businesses in the world run on negative working capital by design. A supermarket or a fast-growing subscription company collects cash from customers immediately but pays its suppliers weeks or months later — effectively financing its operations with other people's money, interest-free. For these companies, negative working capital is a competitive advantage, not a red flag: they are using supplier credit as a cheap funding source. The trick is to know which situation you are looking at, which means understanding the business model, not just the number.
An unusually high working capital ratio is not automatically good news. Cash sitting idle, inventory piling up in warehouses, or customers taking forever to pay all represent capital trapped in the operating cycle instead of being invested to earn a return. Efficient companies work to shrink the cash tied up in working capital — collecting receivables faster, turning inventory quicker, and stretching payables sensibly — which frees cash and lifts return on invested capital. Track the trend over several quarters: a steadily ballooning working capital balance can be an early warning that inventory is not selling or customers are not paying.
Reality check: the right level of working capital depends entirely on the business model, and a snapshot can mislead. This tool is educational, not investment advice. For balance-sheet basics, see the U.S. SEC at investor.gov.
Dig into liquidity with the current ratio and quick ratio calculators, judge capital efficiency with the ROIC calculator, and check debt with the debt-to-equity calculator.
Last updated July 4, 2026 · Written by Mustafa Bilgic. Educational only — not financial advice.
Working capital is current assets minus current liabilities — the short-term resources left over after covering short-term obligations. It represents the money funding a company's day-to-day operating cycle.
For many industries a ratio between about 1.5 and 2.0 is considered healthy: a safe cushion without too much idle capital. Below 1.0 can signal a liquidity concern, though some business models thrive on negative working capital.
Yes, and it is not always bad. Businesses that collect cash from customers before paying suppliers — supermarkets, some subscription firms — run on negative working capital by design, effectively using supplier credit as free financing.
No. Excessive working capital means cash, inventory or receivables are tied up unproductively instead of earning a return. Efficient companies aim to minimise the capital trapped in the operating cycle.