Rule of 72

Front

What is the Rule of 72?

Back

The Rule of 72 is a formula used to estimate the number of years required to double the investment at a fixed annual rate of return. It states that you divide 72 by the annual interest rate.

Front

How do you calculate the time to double an investment using the Rule of 72?

Back

To calculate the time to double an investment, divide 72 by the annual interest rate (in percentage). For example, at 6% interest, it would take approximately 72 / 6 = 12 years to double.

Front

If an investment earns 12% interest, how long will it take to double?

Back

Using the Rule of 72, it will take approximately 72 / 12 = 6 years to double.

Front

If an investment earns 8% interest, how long will it take to double?

Back

Using the Rule of 72, it will take approximately 72 / 8 = 9 years to double.

Front

What is the approximate time to double an investment at 0.5% interest?

Back

Using the Rule of 72, it will take approximately 72 / 0.5 = 144 years to double.

Front

If you invest $500 at 12% interest, how much will you have after it doubles?

Back

You will have $1000 after it doubles.

Front

If you invest $400 at 8% interest, how much will you have after it doubles?

Back

You will have $800 after it doubles.

Front

What is the formula to find the future value of an investment?

Back

The future value (FV) can be calculated using the formula: FV = P(1 + r)^n, where P is the principal amount, r is the interest rate, and n is the number of years.

Front

What does 'principal' mean in the context of investments?

Back

Principal refers to the initial amount of money invested or loaned, before any interest or earnings are added.

Front

What is 'interest rate'?

Back

The interest rate is the percentage at which interest is calculated on an investment or loan, typically expressed annually.