<span>Its very simple. All you have to do is short J and K inputs i.e. same inputs go into both J and K. </span><span>Actually T flip flop is the special case of J-K flip flop when both the inputs of J-K flip flop are equal to 1 ( or logic high) j=k=1. Know electronics has well explained about its designing. A very good use of this flip flop or J=K=1 condition is in counters.
</span><span>The J-K flip flop is universal and can be used to make any of the other times.
I agree with know electronics and VKP that it can be used in counters.
Adding the practical use of conversion here .
When you are working on ASIC or SOC Design, In the ECO stage if you want T or D flipflop
and you have only JK flipflops then this conversion techniques can be helpful.
similarly MUX conversions are helpful in realizing computational gates</span>
