Calculators for the Wigner 3j, 6j, and 9j symbols, relevant to angular momentum coupling in quantum physics.

Rewritten in JavaScript using BigInt, to enable accurate calculations for larger j values. (The old Java version is in the java branch.)

See wigner-3j6j9j.html (served here) for an example of how to use the scripts, plus links to information about the 3j/6j/9j symbols.