Is this a good....

hey guys.. is this a good port length calculator? looks really simple.. easier than the other ones i've used/seen

http://www.audiobahninc.com/tech/Calculators/PortLengthCalc.htm

i know its audiobahn... but im sure it can't be that bad.. thx

also how come when i put a port width.. of.. about 2 or higher. the lenth gets rediculously long.. i was hoping for a kinda small box.. but the length goes to (for example) 35inchs.. dam 35 inches thats almost all my trunk already

also if anything i say seems uneducated concerning this subject.. well i dont know anything about tuning boxes.. so im jus asking thx

I am tired, go to bed