How do I know how much alimony I am entitled to ?

The specific amount of spousal support is beyond the purpose of this blog. You would need to obtain all information relevant to the determination of his income. Then, consult a support calculator, for example, the website, "mysupportcalculator.ca", and also any specific details may be confirmed by reviewing the Spousal Support Advisory Guidelines, which are available on the Department of Justice Canada website. The amount of spousal support is determined based on the income differential between each of you, net of taxes, benefits and credits, and having regard to the length of relationship and the age of the recipient on separation. There are different ranges which may apply depending on the situation. You may also consider applying for a division or credit splitting of the Canada Pension Plan credits. Finally, you should consult with a lawyer to ensure you obtain what you are entitled to in respect of the spousal support and you should contact Service Canada to discuss the CPP credit splitting issue.