What is the price-to-sales (P/S) ratio?
The price-to-sales ratio compares a company's market value to its revenue. Because sales are almost always positive, P/S is especially useful for unprofitable growth companies, early cyclical recoveries, and sectors where earnings swing wildly year to year.
When a firm turns profitable, cross-check P/S with the price-to-earnings calculator and growth-adjusted multiples from the PEG ratio calculator to see whether revenue-based optimism is supported by earnings power.
P/S ratio formulas
Per share, divide the stock price by revenue per share (SPS). At the company level, divide market capitalization by total revenue:
When you have total revenue and shares outstanding, compute SPS first:
Worked example: $50 price and $10 SPS
A stock at $50 with revenue per share of $10.00 has a P/S of 5.00, meaning the market values the company at five times its annual sales per share:
Company-level calculation
A $500,000,000 market cap and $100,000,000 of revenue also produce P/S 5.00. The detailed mode derives SPS from those totals before applying the per-share formula.
How to interpret P/S in practice
- P/S below 1.00: The market values the firm at less than one year of sales, which can signal distress or deep cyclical pessimism.
- P/S between 1.00 and 4.00: Typical for many mature businesses with moderate margins.
- High P/S: Common for high-growth SaaS and biotech where investors price in future margin expansion.
- Adjust for margins: Two firms with the same P/S can differ sharply in profitability; always consider net margin and unit economics.
Frequently asked questions
What is a good P/S ratio?
When should I use P/S instead of P/E?
P/S vs EV/Sales: what is the difference?
Does P/S account for debt?
Should I use trailing or forward revenue?
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Resources and references
The formulas and methods in this calculator were checked against these independent sources.