Add an extra amount to each monthly payment and instantly see how many years you cut off your loan and how much interest you save. Toggle biweekly payments too.
Every extra dollar goes straight to principal, so it removes all the future interest that dollar would have accrued. Even $100–200 a month can save tens of thousands over a 30-year loan.
It depends on your mortgage rate versus expected investment returns and your risk tolerance. This tool shows the guaranteed interest saved so you can compare.