Valve To Piston Calculator

Hey everyone! Is there a valve to piston calculator online? I had my distance recorded with my Hughes cam but I switched to a Comp cam this year and in my haste I forgot to check the distance with the new cam before I put it all together. I really don't want to tear it apart and use clay to check it.
It's a XE274H cam with .236 degrees of Ex. duration @.050 and I'm quite sure it will be fine but I just want to be sure.
I did measure it at TDC with a valve drop to the relief with the head gasket is .380 on the intake and .310 on the exhaust.