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Interroyal Engineering PCLBKK:IROYAL +1.67%22 Graham Number is ฿4.73 as of Mar. 2026, which is 100% below its 10-year median of 1.16. GuruFocus rates BKK:IROYAL with a GF Score™ of 22/100. The stock has 2 warning signs investors should review. Among 2,215 Industrial Products companies, Interroyal Engineering PCL ranks better than 76.43% on this metric.
Graham Number is a figure that measures a stock's fundamental value by taking into account the company's earnings per share and book value per share. The Graham number is the upper bound of the price range that a defensive investor should pay for the stock. According to the theory, any stock price below the Graham number is considered undervalued, and thus worth investing in.
The historical rank and industry rank for Interroyal Engineering PCL's Graham Number or its related term are showing as below:
BKK:IROYAL'
s Price-to-Graham-Number Range Over the Past 10 Years
Min: 0.88 Med: 1.16 Max: 1.34
Current: 1.03
During the past 4 years, the highest Price to Graham Number ratio of Interroyal Engineering PCL was 1.34. The lowest was 0.88. And the median was 1.16.
BKK:IROYAL's Price-to-Graham-Number is ranked better than 76.43% of 2215
companies
in the Industrial Products industry
Industry Median: 1.81
vs BKK:IROYAL: 1.03
Graham Number is a combination of asset valuation and earnings power valuation. It is a very conservative way of valuing a stock.
Interroyal Engineering PCL (BKK:IROYAL) Graham Number Explanation
Ben Graham actually did not publish a formula like this. But he wrote in The Intelligent Investor (1948 version) regarding to the criteria for purchases:
Current price should not be more than 15 times average earnings of the past three years.
Current price should not be more than 1.5 times the book value last reported. However, a multiplier of earnings below 15 could justify a correspondingly higher multiplier of assets. As a rule of thumb we suggest that the product of the multiplier times the ratio of price to book value should not exceed 22.5. (This figure corresponds to 15 times earnings and 1.5 times book value. It would admit an issue selling at only 9 times earnings and 2.5 times asset value, etc.)
Unlike valuation methods such as DCF or Discounted Earnings, the Graham number does not take growth into the valuation. Unlike the valuation methods based on book value alone, it takes into account the earnings power. Therefore, the Graham Number is a combination of asset valuation and earnings power valuation.
In general, the Graham number is a very conservative way of valuing a stock. It cannot be applied to companies with negative book values.
Interroyal Engineering PCL's Price to Graham number Ratio for today is calculated as
Price to Graham number
=
Share Price (Today)
/
Graham number (Q: Mar. 2026 )
=
4.88
/
4.45
=
1.10
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Be Aware
Please keep these in mind:
1. Graham Number does not take growth into account. Therefore it underestimates the values of the companies that have good earnings growth. We feel that if the earnings per share grows more than 10% a year, Graham Number underestimates the value.
2. Graham Number punishes the companies that have temporarily low earnings. Therefore, an average of earnings makes more sense in the calculation of Graham Number.
3. Graham Numbers underestimates companies that are light with book.
Interroyal Engineering PCL Graham Number Related Terms
Interroyal Engineering PCL Graham Number Historical Data
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
BKK:IROYAL vs GEV, ETN, PH: Graham Number Comparison
For the Specialty Industrial Machinery subindustry, Interroyal Engineering PCL's Price-to-Graham-Number, along with its competitors' market caps and Price-to-Graham-Number data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Interroyal Engineering PCL Price-to-Graham-Number vs Industrial Products Industry
For the Industrial Products industry and Industrials sector, Interroyal Engineering PCL's Price-to-Graham-Number distribution charts can be found below:
* The bar in red indicates where Interroyal Engineering PCL's Price-to-Graham-Number falls into.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Interroyal Engineering PCL (BKK:IROYAL) has a Graham Number of ฿4.73 as of Mar. 2026. The Graham Number values a company based on its per-share earnings and book value. View historical data on Interroyal Engineering PCL and its competitors. This is 308% above median its historical median of 1.16. Over the past decade, Interroyal Engineering PCL's Graham Number has ranged from 0.88 to 1.34. According to the industry distribution chart, Interroyal Engineering PCL ranks #522 out of 2215 companies in the Industrial Products industry, placing it in the top 23.6%.
Is Interroyal Engineering PCL's Graham Number too high?
Interroyal Engineering PCL's current Graham Number of ฿4.73 is 308% above median its 10-year median of 1.16. Over the past 10 years, this metric has ranged from a low of 0.88 to a high of 1.34. Based on the distribution chart, Interroyal Engineering PCL ranks #522 out of 2215 companies in the Industrial Products industry, which is in the top quartile — a strong position relative to peers. Overall, Interroyal Engineering PCL has a GF Score™ of 22/100, reflecting its overall financial health beyond just this single metric.
How does Interroyal Engineering PCL's Graham Number compare to GEV and ETN?
According to the Industrial Products industry distribution chart, Interroyal Engineering PCL ranks #522 out of 2215 companies for Graham Number. This places Interroyal Engineering PCL in the top 24% of its industry — outperforming the majority of peers. The industry median Graham Number is 1.81. Historically, Interroyal Engineering PCL's own Graham Number has ranged from 0.88 to 1.34 over the past decade. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Graham Number for an Industrial Products company?
The median Graham Number among Industrial Products companies is 1.81, based on 2,215 companies in the industry. Companies in the top quartile (top 25%) have a Graham Number significantly above this median, while those in the bottom quartile fall well below. However, Graham Number should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Graham Number mean?
A high Graham Number can signal that a stock is expensive relative to its fundamentals. The Graham Number values a company based on its per-share earnings and book value. View historical data on Interroyal Engineering PCL and its competitors. For the Industrial Products industry, the median Graham Number is 1.81 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Interroyal Engineering PCL's current Graham Number is ฿4.73, which is 308% above median its own 10-year median of 1.16. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Interroyal Engineering PCL stock overvalued right now?
Interroyal Engineering PCL (BKK:IROYAL) has a current Graham Number of ฿4.73. The current Graham Number is ฿4.73, which is 308% above median its 10-year median of 1.16. Interroyal Engineering PCL's overall GF Score™ is 22/100 with 2 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Graham Number calculated?
Graham Number is calculated from a company's financial statements. For Interroyal Engineering PCL (BKK:IROYAL), the current Graham Number is ฿4.73 as of Mar. 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Interroyal Engineering PCL provides comprehensive engineering solutions both in Thailand and internationally including the procurement, design, installation, and maintenance of machinery and equipment for various industries which are divided into: Energy; Communications, Networks, and Intelligent Technology; Petroleum and Natural Gas Business Support; Environmental Management and Future Energy Development. The group operates in two business segments: revenues from sales; and revenues from sales with installation.
22GF Score
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