I went here: http://www.canadapost.ca/cpotools/apps/far/personal/farInt?execution=e1s3 and put in some random info

Toronto m4c 1b5, to Australia, 7 KG, 12 X 10 X 4 (inches)

It spit back

Rate Summary
Base Price $242.45
Coverage* $ Update $0.00
Fuel Surcharge $18.18
Options $0.00
Tax $0.00
Total $260.63