A FFUUTT code (or N-value) is a convenient way of representing commutative ternary operators with a 6-trit number. This generator will give you a decimal value of this code if you fill in the truth table below. Valid input is 'F', 'U' and 'T'.
The N-value is generated by evaluating the truth value of FF, FU, UU, UT, TT, TF as a balanced ternary number (most significant digit first), so by merely entering the truth values into the table, you obtain the ternary N-value. What this calculator does is convert it to decimal.