Test your knowledge of compound interest, the Rule of 72, and related investing concepts in our most popular investing quiz! There’s a trick question – can you spot it?

Compound interest is the interest you earn on your original money and on the interest that keeps accumulating. Compound interest allows your savings to grow faster over time.

Feb 9, 2026 · What is compound interest? The concept of compound interest, or 'interest on interest', is that accumulated interest is added back onto your principal sum, with future interest being calculated …

What is compound interest? Compound interest is when you earn interest not only on your initial deposit but also on the interest you've already earned.

Oct 9, 2025 · While they sound similar, compound interest refers to interest calculated on both the initial principal and on accumulated interest of previous periods. This is typically viewed in the context of …

The meaning of COMPOUND is something formed by a union of elements or parts; especially : a distinct substance formed by chemical union of two or more ingredients in definite proportion by weight. How …

2 days ago · Understand how simple and compound interest differ, with simple interest calculated on the principal alone and compound interest on principal and accumulated interest.

Chemistry A substance made up of two or more elements joined by chemical bonds into a molecule. The elements are combined in a definite ratio. Water, for example, is a compound having two hydrogen …

This compound interest calculator can help you calculate your potential returns. Try out different numbers to see how much your investment could change over time.

Oct 9, 2025 · Compound interest means your principal gets larger over time and will generate larger and larger interest payments. The difference between simple and compound interest can be massive.