{"success":true,"version":"v1","request":{"tool":"get_calculator_schema","calculator_id":"number-numerology"},"result":{"entity_type":"calculator","id":"number-numerology","calculator_id":"number-numerology","canonical_url":"https://tttkmbb.com/yijing/number-numerology","name":"Number Numerology (数字数理)","title":"Number Numerology (数字数理) – 81-Number Rating of a Phone, Plate or Account Number","category":"yijing","category_name":"I Ching & Five Elements","tool_name":"evaluate_number_numerology","featured_mcp_tool":false,"description":"Reduces a phone, licence-plate or account number to a number 1–81 (last four digits mod 80, or the digit sum) and reports its rating and traditional gloss from the 81 数理 table of five-grid numerology, plus the five-element mapping of its digits under the 河图 and the common 数字五行 conventions, digit counts and the digital root.","use_when":"You want the traditional 81-number (数理) rating and five-element breakdown of a phone number, plate number, account tail or other digit string.","do_not_use_when":"You want the five grids of a personal name (use name-numerology) or an I Ching hexagram cast from numbers (use meihua-yishu); ratings are cultural, not statements about luck.","inputs":[{"name":"number","label":"Number","type":"string","required":true,"description":"4–20 digits (spaces, hyphens and a leading + are ignored), e.g. a phone number, the digits of a plate, or an account tail.","example":"13800001234"},{"name":"method","label":"Reduction method","type":"enum","required":false,"default":"last_four_mod_80","values":[{"value":"last_four_mod_80","label":"Last four digits mod 80 (0 → 80)","aliases":["mod80","last_four"]},{"value":"digit_sum","label":"Digit sum mod 81 (0 → 81)","aliases":["sum"]}],"description":"How the number is reduced to the 1–81 range of the table.","example":"last_four_mod_80"}],"outputs":[{"name":"numerology_number","label":"Numerology number (数理)","type":"integer","decimals":4,"description":"The reduced number 1–81 looked up in the table."},{"name":"rating","label":"Rating","type":"string","decimals":4,"description":"吉 (auspicious), 半吉 (mixed) or 凶 (inauspicious) per the 熊崎氏 81 数理 table."},{"name":"meaning_keyword","label":"Traditional gloss","type":"string","decimals":4,"description":"Eight-character gloss of the number as reproduced in the popular table (cultural, several textual variants exist)."},{"name":"reduction","label":"Reduction","type":"string","decimals":4,"description":"How the numerology number was obtained."},{"name":"digit_five_elements","label":"Digit five elements","type":"object","decimals":4,"description":"Elements of each digit and element counts under the 河图 convention (1/6 Water, 2/7 Fire, 3/8 Wood, 4/9 Metal, 5/0 Earth) and the common 数字五行 convention (1/2 Wood, 3/4 Fire, 5/6 Earth, 7/8 Metal, 9/0 Water)."},{"name":"digit_counts","label":"Digit counts","type":"object","decimals":0,"description":"How often each digit 0–9 occurs."},{"name":"digit_sum","label":"Digit sum","type":"integer","decimals":4,"description":"Sum of all digits."},{"name":"digital_root","label":"Digital root","type":"integer","decimals":4,"description":"Digit sum reduced repeatedly to a single digit (0 only for an all-zero number)."},{"name":"repeated_digits","label":"Repeated digits","type":"string","decimals":4,"description":"Digits that occur more than once, with their counts."},{"name":"disclaimer","label":"Disclaimer","type":"string","decimals":4,"description":"Cultural framing of the result."}],"input_schema":{"type":"object","properties":{"number":{"description":"4–20 digits (spaces, hyphens and a leading + are ignored), e.g. a phone number, the digits of a plate, or an account tail.","type":"string","examples":["13800001234"]},"method":{"description":"How the number is reduced to the 1–81 range of the table.","type":"string","enum":["last_four_mod_80","digit_sum"],"default":"last_four_mod_80","examples":["last_four_mod_80"]}},"additionalProperties":false,"required":["number"]},"output_schema":{"type":"object","properties":{"numerology_number":{"description":"The reduced number 1–81 looked up in the table.","type":"integer"},"rating":{"description":"吉 (auspicious), 半吉 (mixed) or 凶 (inauspicious) per the 熊崎氏 81 数理 table.","type":"string"},"meaning_keyword":{"description":"Eight-character gloss of the number as reproduced in the popular table (cultural, several textual variants exist).","type":"string"},"reduction":{"description":"How the numerology number was obtained.","type":"string"},"digit_five_elements":{"description":"Elements of each digit and element counts under the 河图 convention (1/6 Water, 2/7 Fire, 3/8 Wood, 4/9 Metal, 5/0 Earth) and the common 数字五行 convention (1/2 Wood, 3/4 Fire, 5/6 Earth, 7/8 Metal, 9/0 Water).","type":"object"},"digit_counts":{"description":"How often each digit 0–9 occurs.","type":"object"},"digit_sum":{"description":"Sum of all digits.","type":"integer"},"digital_root":{"description":"Digit sum reduced repeatedly to a single digit (0 only for an all-zero number).","type":"integer"},"repeated_digits":{"description":"Digits that occur more than once, with their counts.","type":"string"},"disclaimer":{"description":"Cultural framing of the result.","type":"string"}}},"formula":"last_four_mod_80: N = (last four digits) mod 80, 0 → 80. digit_sum: N = (sum of digits) mod 81, 0 → 81. digital_root = 1 + (digit_sum − 1) mod 9 (0 when digit_sum = 0). Rating and gloss from the 81 数理 table (1–81).","method":"The 81 数理 ratings and glosses are the widely reproduced table of 熊崎健翁's five-grid school (五格剖象法), with the three-level rating 吉/半吉/凶; published versions differ for numbers 40, 43, 50, 61 and 73. Traditional reference calculation from the Chinese divination and numerology literature: it reports what the tradition assigns to the cast or number, not a prediction and not medical, legal or financial advice.","sources":[{"name":"Wikipedia (zh) – 五格剖象法 (five grids and the 81 数理 table)","url":"https://zh.wikipedia.org/wiki/五格剖象法","type":"reference","retrieved_at":"2026-09-24"}],"freshness":{"type":"static","max_age_seconds":null,"note":"Deterministic formula with fixed constants; results never go stale. Inputs supplied by the caller determine the output."},"examples":[{"name":"Phone 13800001234, last four mod 80","inputs":{"number":"13800001234","method":"last_four_mod_80"},"expected":{"numerology_number":34,"rating":"凶 (inauspicious)","meaning_keyword":"破家之身 见识短小","digit_sum":22,"digital_root":4,"repeated_digits":"0 ×4, 1 ×2, 3 ×2","digit_counts":{"0":4,"1":2,"3":2,"8":1}},"url":"https://tttkmbb.com/api/v1/calculate/number-numerology?number=13800001234&method=last_four_mod_80"},{"name":"0000 (remainder 0 → 80)","inputs":{"number":"0000","method":"last_four_mod_80"},"expected":{"numerology_number":80,"rating":"凶 (inauspicious)","digit_sum":0,"digital_root":0,"repeated_digits":"0 ×4"},"url":"https://tttkmbb.com/api/v1/calculate/number-numerology?number=0000&method=last_four_mod_80"}],"faq":[{"q":"Why the last four digits?","a":"Popular phone-number numerology takes the last four digits (the personal part of a Chinese mobile number) mod 80 so the result falls in 1–80 of the 81 table; the digit-sum method uses the whole number."},{"q":"Which five-element mapping is right?","a":"Both are in use: the 河图 (River Map) pairs 1/6 Water, 2/7 Fire, 3/8 Wood, 4/9 Metal, 5/0 Earth; the popular 数字五行 uses 1/2 Wood, 3/4 Fire, 5/6 Earth, 7/8 Metal, 9/0 Water. The output shows both."}],"tags":["number numerology","phone number numerology","数理","81 numbers","licence plate numerology","five elements of digits"],"related":[{"calculator_id":"name-numerology","reason":"Same 81 数理 table applied to the five grids of a name."},{"calculator_id":"five-elements","reason":"Generating and controlling relations of the digit elements."},{"calculator_id":"meihua-yishu","reason":"Cast an I Ching hexagram from numbers instead."}],"links":{"html":"https://tttkmbb.com/yijing/number-numerology","markdown":"https://tttkmbb.com/yijing/number-numerology.md","json":"https://tttkmbb.com/yijing/number-numerology.json","api":"https://tttkmbb.com/api/v1/calculate/number-numerology","schema":"https://tttkmbb.com/api/v1/calculators/number-numerology","openapi":"https://tttkmbb.com/openapi.json","mcp":"https://tttkmbb.com/mcp"},"version":"v1","updated_at":"2026-09-24"},"timestamp":"2026-09-24T08:32:18Z"}