99ft 7in is 30.353m

"Hey Siri, what is 99ft 7in in meters"

> I'm guessing it should read 99ft 7in.

Yep.

> That would put it at just over 3m

Nope.

My trick to convert to meters from feet is: just convert it to yards and ignore the difference.

Convert to yards and subtract 10%.

Easy mental math and much closer.

Or just go straight to 30%? (Take 10% & multiply by 3)

Seems easier to remember the one number than 'divide by 3 for yards then subtract 10% for meters', assuming you have no use for yards. (I use yards colloquially, but never as a measurement.)