Where every number here comes from: the market median calculated from asking prices, lucky number scoring in Thai and Chinese traditions, and the limits of each.
Numerology tables version 2026.09.1, last updated 3 October 2026
This page exists so that you can check our work. Websites that score auspiciousness usually give only a summary figure saying how many points a number scored, without saying which texts the score comes from or how it was calculated. Websites that give prices usually do not say what the price is compared against. We chose to do the opposite on both counts: we open up the formulas, show the sources, and admit plainly where the data is not yet enough to draw a conclusion.
A key rule of this system is that no value, meaning or weight is hard-coded into the program. They live in belief tables kept in files with version numbers, and the market median thresholds are likewise kept separately and can be edited. When anything is changed, we record what changed and why. So for any result you see, you can always trace back which set of rules it was calculated with.
The price figures for plates on sale on this website are asking prices, meaning the prices sellers have posted, not the prices actually agreed when a sale closes. The prices at which plates actually change hands on the secondary market and the prices dealers pay to buy plates are not published, so we neither show nor estimate them. Department of Land Transport (DLT) auction results are public information and are the real prices of newly issued plates in that round. We show what we have been able to collect on the matching plate pages, separately from asking prices. This is the most important point on this page, because it determines which questions the figures you see can and cannot answer.
There are four counting rules. First, we use the median, not the average, because plates priced in the tens of millions of baht really do exist and would skew the average for the whole group. Second, one plate counts as one price: when the same plate appears in several listings, the lowest price is used to represent it. Third, listings that do not state a price are not counted in the statistics at all. Fourth, asking prices and actual auction closing prices are different kinds of figures and must never be combined in a calculation.
Listings that have not been seen in new data collection rounds for longer than the set freshness threshold are removed from the calculation, so that prices left up for a long time do not pull the median away from current market conditions.
A price comparison only means something when it is made against things that are genuinely alike, and the letter series is the biggest price factor for the same number. In our data, plates with the same number in Bangkok in a series without a leading digit, such as กข, are priced on average about twice as high as those in a series with a leading digit, such as 1กข. So the system does not discard plates from other series; instead, it adjusts each plate's price to be equivalent to the series of the plate you are viewing before finding the median. The price the seller set on the web page is not touched; the adjustment affects only the market median and the price range.
The adjustment ratios are derived from real asking prices using a model that compares only plates with the same number in the same market, separating out the effects of the plate prefix format, the leading digit, the first and second letters, doubled letters, plate type, and the specific effect of each series. Series with few samples are pulled towards the middle so that they are not adjusted more strongly than the data supports, and the series effect grows stronger for premium numbers such as single-digit and two-digit numbers, triple digits and four of a kind. Plates that need a large adjustment are given less weight, and the adjusted figures are rounded to three significant digits because they are estimates. We test this by hiding the prices of a portion of plates at a time and having the system guess them. The latest test results are shown at the bottom of this page.
There are four levels of comparison group. Level one is the same number in the same market across all series. Level two is numbers with the same pattern and the same number of digits in the same market. These two levels can give a firm verdict on whether a price is cheap or expensive once the samples meet the minimum threshold. Level three is the same number across all provinces, and level four is numbers of the same pattern across the whole catalogue. These last two levels mix several markets, so they are used only to show a price range. The system chooses the first level that can give a firm verdict. If no level passes the threshold, it shows a price range from the most precise level that has data, and it always states which group the market median comes from and how many listings it is based on.
The reason Bangkok must be separated from the other provinces is that they are clearly different markets. Plates with the same number can differ in price several times over between Bangkok and the provinces. Pickup trucks and passenger cars are also different markets. Plates with no province stated cannot be placed in any market, so they are shown as a price range only. For plates not yet in our catalogue, the system estimates from the letter series and number of the plate you enter, comparing it with plates of the same number in other series and adjusting for the series. Special word series plates depend heavily on each individual word and have few samples, so they are shown as a price range only.
Once the market median is found, the system compares the price the seller set with that median. If it is within the set range of the median, it is considered to be at the market median. If it is below that, the system says it is below the market median, and if it is above, it says it is above the market median, stating the difference as a percentage so you can see how far off it is.
This verdict is not a recommendation to buy or not to buy. A plate priced above its group may have reasons the figures do not capture, such as a letter series that reads more pleasingly or how ready the paperwork is. What the verdict gives you is a starting point for negotiation, not a conclusion.
If the price being compared is unusually far from the group's median, the system does not give a verdict, because that means the comparison group is not a suitable baseline for that plate, not that the price is truly cheap or expensive. The verdict also does not deduct a liquidity discount or transfer costs, because the market median is an asking price, and the price actually agreed is usually lower.
The values currently in use, including the minimum number of samples, the range still considered to be at the market median, and the data freshness window, are shown at the bottom of this page together with the number of plates with prices available for comparison at the time you open the page.
This website's price calculator is free to use and does only one job, comparing asking prices with comparable plates, so there are four things it does not assess for you. First, the liquidity discount. The market median is an asking price that already includes the dealer's profit, so the price a plate actually sells for and the buy-in price are usually lower, but there is no published data on how much lower, so we do not estimate it. Second, the plate's legal status, such as whether the auction price has been paid in full, whether it has been registered to a vehicle, and how many days are left before the 180-day deadline. Third, the numerology digit sum, which is a belief and a secondary price factor; we do not add it to or subtract it from the market median. Fourth, the personal meaning of the text on the plate, which can make some buyers willing to pay unusually high prices.
People who study this market suggest deducting a liquidity discount of 20 to 40 percent for ordinary new series and 10 to 25 percent for rare numbers, and estimate that a good digit sum adds about 10 to 20 percent to the price within the same group. These figures are assumptions and inferences from asking prices, not published statistics, so we keep them in an article for you to decide for yourself rather than building them into the calculator. The full valuation process is in the article on how to value a license plate in 7 steps.
Thai numerology holds that every letter has a numerical value. Adding together the values of the consonants in the letter series, the leading digit of the series, and every digit of the plate number gives a digit sum that is compared against a table of meanings. The digit sum of a vehicle plate generally ranges from a single digit up to the low sixties.
The widely used table of consonant values groups ก ด ถ ท ภ with a value of 1, and ข บ ป ง ช with a value of 2, and so on up to the group ฐ ฏ ฬ with a value of 9. Digits take their own value, with 0 counting as zero. The point where schools differ most is how certain consonants are grouped, so we keep the table we use in a separate file and keep it open to revision.
Three things can be configured in the system: whether to count the value of the letter series, whether to count the leading digit of the series, and whether special words such as the special word series take their value from every consonant in the word or from a fixed value. Our default is to count everything, because that is the most common approach, and whichever option you choose, the results page always shows the full breakdown of every character.
Besides the digit sum, Thai texts also read the meaning of each two adjacent digits. For example, the number 1234 has the pairs 12, 23 and 34 to read. We give the final pair more weight than the others, because the texts hold that the final pair is where the story ends up.
Each digit is also linked to a planet in Thai astrology: 1 with the Sun, 2 with the Moon, 3 with Mars, 4 with Mercury, 5 with Jupiter, 6 with Venus, 7 with Saturn, 8 with Rahu and 9 with Ketu. We use this to describe the character of each digit and to match numbers with birth days.
Taksa (Thai astrological system) divides the Thai consonants into eight groups and places them on a wheel linked to the seven days of the week plus Wednesday night. The group of your birth day is Boriwan (บริวาร, the position of companions and dependants), and the positions continue in order up to the eighth, Kalakini (กาลกิณี), the group of letters the texts advise people born on that day to avoid. The Kalakini digits are in turn derived from the planet of that Kalakini group.
When you select a birth day in the calculator, the system checks whether the plate has any letters or digits that match that day's Kalakini. If it does, a warning bar appears immediately rather than being hidden in the details, even if the plate's overall score is high. And if the plate has digits that are Sri (ศรี, the position of fortune and charm) or Montri (มนตรี, the position of support and patronage) for that day, the system adds a small bonus.
The Taksa table is the part users can check straight away and the part that most affects credibility, so we treat it as data that must be reviewed before publication, and we show the table actually used on the page for each birth day so that you can compare it with your own texts.
The Chinese side does not calculate a digit sum but reads numbers by how they sound in Chinese. The number 8 sounds like fa, meaning to prosper. The number 9 sounds like jiu, meaning long-lasting. The number 6 suggests smoothness, and the number 3 suggests birth and growth. The number 4 is avoided by some Chinese people because it sounds like the word for death. This is a cultural belief, not a fact, and the system does not claim it causes any harm.
The system also looks for number combinations with idiomatic meanings, such as 168, read yi lu fa, meaning prosperity all along the way; 888, which repeats prosperity three times; or 289, which suggests success that comes easily and lasts. Each combination has its own positive or negative score, and we cap the total for this part so that it cannot swing far enough to drown out the other parts.
The final digits carry more weight than the leading ones, because Chinese tradition holds that the last digits are the end result. And during Period 9 in Flying Star feng shui, which covers 2024 to 2043, the numbers 9, 1 and 8 are considered to receive the energy of the period, so the system gives a small bonus when the final digit is one of these, with a note that this is an interpretation based on the period and not a fixed rule.
The Thai score comes from the digit sum, the digit pairs, and compatibility with your birth day if you provide it. The Chinese score comes from the meaning of each digit, number combinations, and the period bonus. The two sides are then combined according to weights you can choose in three modes: Thai only, Chinese only, or mixed, which is the default. The system remembers the mode you chose on your own device.
The overall score is converted into one to five stars and a descriptive level ranging from very auspicious to best avoided, so that you can compare several plates quickly. However, we always recommend looking at the breakdown as well, because two plates with the same score may get there from different strengths.
The beliefs content on this website is compiled by our content team from the numerology and Taksa texts widely used in Thailand, together with the Chinese cultural tradition of numbers that sound like other words. We do not claim this is the only correct set of texts, and when there is a well-founded objection, we will update the tables and state the date and the reason.
The limitations you should know about are: one, different schools group the letters and assign meanings to digit sums differently on some points; two, scoring converts qualitative descriptions into numbers so that they can be compared, which inevitably involves judgement calls by the system's designers; and three, all of this is personal belief, not a guarantee of any outcome in real life.
There are also three limitations on the price side. One, the market median is calculated from asking prices only. Actual sale prices on the secondary market are not published, and we have been able to collect DLT auction results for only some rounds, which we show separately. The market median can therefore only tell you who has priced higher or lower than whom. Two, we can only collect publicly published listings, so plates traded quietly are not in the statistics. Three, some comparison groups, especially old series and special series, have few samples, so we prefer not to draw a conclusion rather than guess.
We do not store the birth date you enter in the calculator. Processing is done and then discarded, without being saved to a database or linked to your identity.
Every value here is read from the system when you open this page, not typed into the text.
The market median is the median asking price across the comparable plates we have collected. It is not an actual sale price, which is usually lower because of negotiation and liquidity. We only show it when the comparison group has enough listings, so plates without enough comparables have no market median.
Numerology readings are a matter of personal belief. Please use your own judgement. They are not a guarantee of any outcome.