Here are a few calculators to give you some insight to understanding debt impact and savings growth models:
How long will it take to pay off my credit card(s)?
Do I have too much debt?
Restructuring debts for accelerated payoff
How much home can I afford?
Comparing mortgage terms (i.e. 15, 20, 30 year)
What is my projected net worth?
Will I be able to pay back my student loans?