What is the measurement of 1 1/2 cups of cilantro leaves into ground cilantro
The two are not interchangeable.

One is fresh leaves; the other is ground seeds.
They don't taste anything like one another.

At a push you could use fresh flat-leaf parsley. It would add some 'freshness' to the flavour, but wouldn't be a proper substitute, even then.

A late thought - is your ground herb actually labelled 'cilantro', or are you translating from the US term for 'coriander leaves'.
In US terminology, 'cilantro' equates to coriander leaves [fresh] &amp; 'coriander' is specifically the seeds.
In UK terminology both are called 'coriander' &amp; the specific type, leaves or seeds will be mentioned separately on the packaging, if there is any potential for confusion.