When planning your retirement, you will want to crunch some numbers just to be sure you will have enough money to reach your retirement goals. Here are a few of the popular retirement calculators to help you with this task. The best tool for you depends on your stage in life (still working versus already retired) as well as the amount of time you're willing to spend entering data.

» Fideltiy Retirement Income Planner

The best tool for those who like the "what if" game-what if I retire later, or invest more daringly, it’s convenient as it saves all data you enter.

» Financial Engines

This user-friendly tool tells you how likely you are to meet your goals and recommends specific investments to get you there.

» Morningstar Retirement Planner

Click "tools" and then "retirement planner." You want recommendations of specific funds, both index and actively managed.

» Vanguard Retirement Calculator

Simple to use, but a bit hard to find. Click "planning & education" and then "retirement planning." You want a simple tool to see if you're saving enough.

» T. Rowe Price Retirement Income Calculator

The best tool for those who like the "what if" game-what if I retire later, or invest more daringly, it’s convenient as it saves all data you enter.

» ESPlannerPlus

You want superdetailed projections of your future investment returns, retirement spending and insurance needs.

» Quicken's Retirement Planner

You're a user of Quicken's financial planning software and want a rough idea of how much you need to save.