If you use Topspin, there's AU program gradratio that calculates your gradients in HSQC, HMQC, HMBC after you chose for a combination of nuclei. nuclei chosen in edasp
Particluary, for 195Pt/1H it calculated:
HSQC (hsqcetgp) 80:17.2
HMBC (hmbcgp) 70:30:61.5
For