401k Definition The free online 401k calculator makes it easy to calculate how much money will be in your 401k when you retire. With just a few movements of your mouse you can let our free 401K retirement calculator do all of the work for you! Just enter in your salary, 401k contribution percentage, 401k employer match percentage, estimate 401k plan return, and the number of years until you retire. Calculating your 401k retirement savings is easy – it’s the actual savings part that can be hard! Try the free online 401k plan calculator now! Also, check out the Roth IRA Calculator or traditional IRA calculator.

How to Calculate 401k Let's be honest - sometimes the best 401k calculator is the one that is easy to use and doesn't require us to even know what the 401k formula is in the first place! But if you want to know the exact formula for calculating 401k then please check out the "Formula" box above.