How likely am I to see a big spider in australia I am an arachnophobe?

you wont , they are small and lethal ..

if you look in the right places or go to the zoo you will 

As with all countries does have spiders but there are only 2 types here that have toxic bites.  The chance of you being bitten in a town or city is minute and you are in more danger you would be in a car or buss accident than you would be bitten by a spider.  Most of the indoor spiders are what we call daddy long legs and these cannot harm you.  Australia has this reputation for deadly snakes and spiders but on a holiday you are every unlikely to see any of them.  The number of people killed by snakes and spiders is like a couple people a year and they got bitten as they tried to capture or kill the snake or spider.  Leave them alone if you come across them and they will leave you alone as they know if they attacked you likely they would be killed.  The biggest danger in Australia are sharks and crocodiles, but the truth is many more people die in horse accidents.

  Don't be put off by those stories Australia is full of killer spiders and snakes as very few tourists ever see either.

its the ones you cant see you have to worry about

I am to see them under a spectacle,if i am that sensitive,haha we are laughin,but really, for not catching a disease bye them too.

EXTREMELY LIKELY, as Australian Spiders can grow as big as cars and many can fly and consume human meat!!

Very likely.....................................................

Very likely lol. its australia what do you expect and it also depends what part of the country/continent you are talking about

Krickey There's some biggins there mate

Don't let it bite you and you should be fine, but, there's no specific percentage of spiders in Australia. There's no real way to calculate the question that you are asking.