Hong Life CalculatorsUnderstanding the current and quick ratio calculator — concept and principle
The current ratio and the quick ratio are the two classic tests of short-term liquidity: can a business pay the bills that fall due within the next twelve months out of the assets it can turn into cash within the same period? The calculator works with any currency, because both ratios are pure numbers.
How it is calculated
- Current ratio = current assets ÷ current liabilities
- Quick ratio = (current assets − inventory − prepaid expenses) ÷ current liabilities
- Working capital = current assets − current liabilities
Take all figures from the same balance-sheet date; current liabilities include the current portion of long-term debt.
The principle
The current ratio compares what will become cash within a year with what must be paid within a year. The quick ratio (also called the acid-test ratio) is stricter: inventory must first be sold, and sometimes only at a discount, while prepaid expenses such as rent or insurance paid in advance can never be used to pay a supplier. Removing them leaves the assets that are already cash or close to it, mainly cash, marketable securities and receivables.
Worked example
- Current assets $500,000, inventory $180,000, prepaid expenses $20,000, current liabilities $300,000.
- Current ratio = 500,000 ÷ 300,000 = 1.67×.
- Quick assets = 500,000 − 180,000 − 20,000 = 300,000, so the quick ratio = 300,000 ÷ 300,000 = 1×.
- Working capital = 500,000 − 300,000 = $200,000.00.
How to read the result
A current ratio below 1 means short-term obligations exceed short-term assets, and a quick ratio below 1 means the business depends on selling inventory to pay its bills. Often-quoted rules of thumb are about 1.5–2 for the current ratio and about 1 for the quick ratio, but norms differ greatly by industry: supermarkets that collect cash daily run comfortably on low ratios, while manufacturers with long production cycles need higher ones. A very high ratio is not automatically good; it can signal idle cash, slow-moving stock or uncollected receivables.
Common mistakes
- Mixing figures from different dates or including long-term assets.
- Forgetting the current portion of long-term debt in current liabilities.
- Treating doubtful receivables as fully collectable.
Frequently asked questions
What is a good current ratio?
There is no universal number. Around 1.5–2 is a common starting benchmark, but the right level depends on the industry's cash cycle; compare with peers.
Why is the quick ratio called the acid test?
The name refers to the old acid test for gold: it asks whether the company could meet its obligations immediately without relying on inventory sales.
Can working capital be negative and still be fine?
Yes, for some businesses that collect from customers before paying suppliers, such as many retailers and restaurants. For most others it is a warning sign.
Sources: CFA Institute, CFA Program Curriculum — Financial Analysis Techniques · Brealey, Myers & Allen, Principles of Corporate Finance (McGraw-Hill)