Working Capital Calculator

Background.

A business can be profitable on paper and still miss payroll, because profit is booked when a sale is made and cash arrives when the customer pays. The gap is held in working capital: money tied up in unpaid invoices, stock on the shelves and prepaid bills, offset by what the business itself has not yet paid to suppliers, staff and the tax authorities. In the SEC's plain wording, working capital is current assets minus current liabilities, the cushion left if everything due within the year were paid out of the assets that will turn into cash in the same period.

The subtraction is easy. Deciding what to subtract is not, which is why the two sides are built here from the individual lines of a balance sheet rather than from two totals, and why you must pick a basis. Net working capital counts every current item, cash and short-term borrowing included, and is what lenders and loan covenants usually mean. Operating working capital, also called non-cash working capital, leaves out cash, marketable securities and short-term debt, because how much cash a company holds and how it borrows are financing choices; what remains is the capital that trading itself ties up, and it is the version cash-flow and valuation models use. The same balance sheet gives two different answers, often far apart.

Two rescalings make the figure comparable across companies and over time. Dividing by twelve months of revenue gives working capital as a percentage of sales, and multiplying that by 365 gives days of sales tied up. A change against the previous period shows whether the position absorbed cash or released it.

The result is a snapshot of one date, and it can be flattered by paying suppliers a week late around the period-end or by measuring a seasonal business at its quietest point. More is not automatically better either: money parked in slow-moving stock or overdue receivables earns nothing.

What is working capital calculator?

Working capital is the difference between the assets a business expects to turn into cash within its operating cycle and the obligations it must settle in the same window. Under US accounting rules, FASB ASC 210-10-45-1 and 45-3, an asset is current if it is expected to be realised in cash, sold or consumed during the normal operating cycle or within one year, whichever is longer; businesses with long cycles, the standard's examples being tobacco, distilling and lumber, use the longer period. IAS 1 paragraph 66 sets the same test under IFRS. The current-asset lines are usually cash and marketable securities, receivables net of the allowance for doubtful accounts, inventories, and prepaid expenses and other current assets. The current-liability lines are accounts payable, short-term borrowings with the current portion of long-term debt, and accrued expenses, taxes payable, deferred revenue and other current obligations.

The same lines produce two ratios that often travel with working capital. The current ratio divides current assets by current liabilities instead of subtracting them: 4,034,024 ÷ 2,925,504 = 1.38 for the manufacturing example. The quick ratio keeps only cash, securities and receivables on top, on the view that inventory and prepaid costs cannot be turned into cash quickly: (992,406 + 1,106,744) ÷ 2,925,504 = 0.72. Working capital gives the size of the cushion in money; the ratios show how thick it is relative to what is owed.

How to use this calculator.

1. 01Choose the basis: Net for a liquidity check or a loan covenant, Operating for cash-flow modelling or for comparing how efficiently trading uses capital from one period to the next.
2. 02Copy the current-asset section of the balance sheet into the first four fields. Enter receivables after the allowance for doubtful accounts, and leave restricted cash and cash pledged as collateral out of the cash figure.
3. 03Copy the current-liability section into the next three fields, putting bank borrowings, revolver draws and any long-term loan principal due within twelve months under short-term debt. In Operating mode the cash and short-term debt fields are ignored.
4. 04Enter revenue for the trailing twelve months in the same units as the balance sheet; if the balance sheet is in thousands, revenue must be in thousands too.
5. 05Enter last period's working capital on the same basis you selected, or leave it blank (or 0) if you have no prior figure, in which case the change reads "not compared" instead of a number, and read the change alongside the days of working capital.

The formula.

On the net basis, current assets counted = cash and securities + receivables + inventory + other current assets, and current liabilities counted = payables + short-term debt + other current liabilities. Net working capital is the first total minus the second. On the operating basis the cash and short-term debt lines drop out of each side, leaving (receivables + inventory + other current assets) − (payables + other current liabilities). Nothing is weighted or discounted, and a negative result is reported as a negative number.

Working capital as a percentage of revenue is working capital ÷ annual revenue × 100. Days of working capital is working capital ÷ annual revenue × 365: the number of days of sales tied up in the position. That form compares a $2 million distributor with a $2 billion manufacturer on equal terms, which a dollar amount cannot.

The change is this period minus the prior period. It follows the cash-flow statement's convention: an increase in working capital means cash moved into receivables or inventory and counts as a use of cash, while a decrease releases cash. For that reason the operating basis belongs in free-cash-flow models; counting cash inside working capital would double-count the very balance the cash-flow statement is explaining.

The operating basis also explains why short-term borrowing does not create working capital. Drawing $50,000 on a credit line raises cash by $50,000 and short-term debt by $50,000. On the net basis the two cancel, and on the operating basis neither is counted. Only moving the obligation out of the current section, by refinancing it as long-term debt or replacing it with equity, raises net working capital.

A worked example.

Frequently asked questions.

References& sources.

1. [1]U.S. Securities and Exchange Commission. "Beginners' Guide to Financial Statements." Investor publication. Source of "Working Capital = Current Assets – Current Liabilities". Note: sec.gov returns HTTP 403 to automated fetchers; the page loads normally in a browser.
2. [2]Financial Accounting Standards Board. FASB Accounting Standards Codification, Topic 210 Balance Sheet, paragraphs 210-10-45-1 and 210-10-45-3 (originating in ARB No. 43, Chapter 3A). Definition of current assets and the operating-cycle-or-one-year rule. Free registration required at asc.fasb.org.
3. [3]U.S. Government Publishing Office. 17 CFR 210.5-02, Regulation S-X — Balance Sheets. Current-asset captions 1–9 and current-liability captions 19–21. CFR annual edition, retrieved 2026-07-29.
4. [4]U.S. Census Bureau. Quarterly Financial Report for Manufacturing, Mining, Wholesale Trade, and Selected Service Industries, 2026 Quarter 1. Table 1.1 All Manufacturing balance sheet and the Introduction's financial-operating-ratio definitions. Retrieved 2026-07-29.
5. [5]U.S. Census Bureau. Quarterly Financial Report — QFR Definitions. "Total current assets to total current liabilities. This ratio is obtained by dividing total current assets by total current liabilities." Retrieved 2026-07-29.
6. [6]IFRS Foundation. IAS 1 Presentation of Financial Statements, paragraphs 66 and 68 (2024 issued edition). Superseded by IFRS 18 for annual periods beginning on or after 1 January 2027, with current/non-current classification carried forward unchanged. The ifrs.org standard PDF is login-gated.
7. [7]Damodaran, A. "Working Capital Ratios by Sector (US)." NYU Stern School of Business, data as of January 2026. Total-market non-cash working capital of −21.86% of sales across 5,994 firms. Retrieved 2026-07-29.