The four weights and the total
How much the year, month, day and hour each weigh, and which year name, day and hour they came from. Tap any of them to ask Guanfu why it weighs what it does.
Your birth year, month, day and hour become four weights; their total points to a four-line verse. It is a folk shortcut from old almanacs, and every rule and variant is shown.
Chinese bone weight fortune telling (cheng gu) is a folk method passed down in old almanacs. The lunar birth year, month, day and hour are each looked up in a weight table, the four weights are added together in liang and qian, and the total is matched to a four-line traditional verse. Totals can only fall between 2 liang 1 qian and 7 liang 1 qian, fifty-one steps in all. This tool converts the date to the lunar calendar, looks up the tables, adds them and finds the verse in one go, and shows which year, month, day and hour each weight came from so you can check every step.
These four steps are the order the result page follows, and the order to check if you work it out by hand. Where traditions disagree, the result page shows both answers.
Bone weight uses the lunar calendar. A Gregorian date is converted first, and the year turns on lunar New Year's Day: a birth before the New Year belongs to the previous year, and a birth between the New Year and the start of spring also gets the result counted from the start of spring. The hour is one of twelve two-hour periods; 11 pm to 1 am is the Zi hour.
The year is looked up by its sexagenary name and weighs from 5 qian to 1 liang 9 qian; the lunar month weighs from 5 qian to 1 liang 8 qian. In a leap month, up to the 15th counts as that month and from the 16th as the next.
The lunar day weighs from 5 qian to 1 liang 8 qian, and the hour from 6 qian to 1 liang 6 qian. A birth after 11 pm stays on the calendar date shown rather than moving to the next day; the next-day result is shown as well.
The four weights add up to the total, with 10 qian to 1 liang. Each total has one four-line verse, taken from a text settled by comparing several independent versions line by line, never rewritten from memory. English pages add Guanyitang's own translation.
These are the year, month, day and hour tables this site calculates with, exactly as the result page uses them. Versions occasionally disagree on a value; the comparison and choices are on the sources page.
Each total has its own page with the Chinese verse, the English translation and how often that total occurs. Across all combinations of the four tables, about eight in ten totals fall between 3 and 5 liang, 3 liang 9 qian is the most common, and totals under 2 liang 5 qian or over 6 liang 5 qian are rare.
How much the year, month, day and hour each weigh, and which year name, day and hour they came from. Tap any of them to ask Guanfu why it weighs what it does.
The four-line verse for your total, in the settled Chinese text with Guanyitang's translation. Signed-in users get a free short comment, can tap any line for an explanation, or ask Guanfu for a full reading.
Where traditions differ, on the year boundary, leap months or the late Zi hour, the result says which reading it used and gives the other result too, rather than choosing for you.
Bone weight is worked out on the lunar calendar. You can enter a Gregorian date and it will be converted; the lunar date used is shown on the result so you can check it. If you already know your lunar birthday, entering it directly is safest.
The heaviest values of the four tables never fall on the same birth, so the total can reach at most 7 liang 1 qian and 7 liang 2 qian cannot occur. Many sites still include a verse for it, generally thought to be a later addition. We do not treat it as a result; the text and the explanation are on the sources page.
The hour weighs anywhere from 6 qian to 1 liang 6 qian, so it changes the total and therefore the verse. Rather than guessing noon, check a birth record or ask family first; without the hour, treat the result loosely.
Not in that sense. Lighter totals tend to describe early hardship and self-reliance and heavier ones good fortune, but every verse is old writing, not a judgement of a person's life. The number is simply the sum of four table values.
Everyone gets the same verse; the main versions agree on this. One version also records a separate verse for women, which the Chinese pages show under a Female tab with a plain-language summary.
Bone weight adds up four table values and gives one verse in seconds, best read as a piece of folk culture. BaZi builds the four pillars and reads the balance of the five elements, the Ten Gods and the luck cycles to look at a person's structure and life stages. For a detailed look at yourself, cast a full BaZi chart.