In Canada the standard voltage is 120 V and the frequency is 60 Hz. You can use your electric appliances in Canada, if the standard voltage in your country is in between 110 - 127 V (as is in the US, Canada and most South American countries). Manufacturers take small deviations (plus or minus 5%) into account. Be careful if you bring appliances from Japan (100 V).
If the standard voltage in your country is in the range of 220 - 240 V (as is in the UK, Europe, Asia, Africa and Australia), you need a voltage converter in Canada. Some say you can carefully try to use your appliances in Canada without a converter. Most likely they won't be damaged, but may not function optimally. If you don't want to take any chances, use a converter. You can find voltage converters at Amazon. You can also consider a combined power plug adapter/voltage converter.