Old calendars, worked out in the open.

Free tools for the East Asian calendar and the I Ching. Cast a hexagram by coins or by this moment, and read how each result was worked out.

1–64King Wen Sequence

Selected: Hexagram 49

All 64 hexagrams in King Wen order. Select any tick to inspect trigrams, lines and structure.

Hexagram King Wen Order

49 革 Gé · Molting

兌 over 離

Koyonari’s 64 Hexagrams volume has Hexagram 49 and all six of its lines.

Trigram Coordinates (8×8 Grid)

Every hexagram is mapped by its upper and lower trigram coordinates.

Upper \ Lower	乾Heaven	兌Lake	離Fire	震Thunder	巽Wind	坎Water	艮Mountain	坤Earth
乾Heaven	1	10	13	25	44	6	33	12
兌Lake	43	58	49	17	28	47	31	45
離Fire	14	38	30	21	50	64	56	35
震Thunder	34	54	55	51	32	40	62	16
巽Wind	9	61	37	42	57	59	53	20
坎Water	5	60	63	3	48	29	39	8
艮Mountain	26	41	22	27	18	4	52	23
坤Earth	11	19	36	24	46	7	15	2

Tools

Cast a hexagramThree coins, six tosses, or the current date and hour. Shows moving lines and relating hexagram.2 methods
The 64 hexagramsKing Wen order, each with trigrams, image, commentary and six line texts.64 pages
How the methods workThe coin rule and the time rule, step by step, with worked examples.

Guides

Changing linesWhat a moving line is, how 6 and 9 arise, and how moving lines have traditionally been read.
The eight trigramsThe eight building blocks of the hexagrams and their two traditional sequences.
A short history of the I ChingFrom the Zhou-dynasty line texts to the Ten Wings, and how the book reached Europe.

Questions

How coins are countedWhich side is inscribed, and why the sums are 6, 7, 8 and 9.
Why the same hour gives the same hexagramThe time method is a fixed rule on the calendar date and hour.
All questionsBrowse common inquiries on algorithms and texts.

All 64 on one rule

Every hexagram sits on a single scale. Slide to any of them and its text opens below.

A cast in seconds

Toss three coins or use the current hour. You get the primary hexagram, moving lines and the relating hexagram at once.

Text checked line by line

Judgments, images and all 384 line texts are checked against the received Chinese text.

Free, nothing to install

No sign-up. Works the same on phone and desktop.