Tags | |
This Rule of 72 calculator computes the approximate period to double one's investment.
INSTRUCTIONS: Enter the following:
- (r) This is the annual interest rate
Doubling Period (R72): The calculator estimates the number of periods to double one's investment.
The Math / Science
This formula approximates the period to double one's investment based on the earning percentage (r) per period. The result is the number of periods in the same units (e.g. years for 5% per year) as the period unit for the rate of return. This serves as a quick comparison for evaluating investments.
Personal Finance Calculators
- Monthly Loan Payment: Computes the monthly payment of a fixed interest rate loan (e.g., home mortgage or car loan).
- Credit Card Equation: Computes the number of months to pay off a credit card.
- Mortgage Affordability: Compute the amount of principal one can borrow based on monthly payment, duration and interest rate.
- Leverage Ratio: Calculates a ratio describing debt to income.
- Compound Interest: Computes the compounded interest on a fixed interest rate investment
- CAGR: Computes the compounded annual growth rate achieved on an investment.
- Rule of 72: Provides a quick estimate on time to double an investment
- Simple Interest Earned: Computes a rough estimate on interest earned over time.
- Wage Calculator: Computes the annual, monthly and weekly pay amounts base on hourly wage and hours per week.
- Current Mortgage Rates:
- 30 Year Fixed Interest Rate: 6.92 %
- 15 Year Fixed Interest Rate: 6.37 %
- 7/6 SOFR ARM: [Invalid Constant]
