Here’s how the Rule of 72 works: Divide 72 by your expected annual interest rate (as a percentage, not a decimal). The answer is roughly the number of years it will take for your money to double. For ...

Learn what compound interest is, how it’s calculated—from annual rates to continuous compounding—and why it’s powerful for savings (and dangerous for debt).

Sean Ross is a strategic adviser at 1031x.com, Investopedia contributor, and the founder and manager of Free Lances Ltd. Anthony Battle is a CERTIFIED FINANCIAL PLANNER™ professional. He earned the ...

Begin with the following formula:=PV*(1+R)^NEither write this formula in an Excel spreadsheet cell or elsewhere for reference. Enter the present value in an Excel spreadsheet cell in place of "PV," ...

The world of finance can seem boring to many people, and it's true that the thought of accounting rules, tax laws, valuation formulas, and inventory management systems might put you to sleep. But ...

What these two processes share is baked into the math of each. In fact, in that respect, they're nearly identical. They both involve some stuff (atoms or money) that is either growing or shrinking.