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`Ro72 = 72/ "r" `
Enter a value for all fields
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.
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- Current Mortgage Rates:
- 30 Year Fixed Interest Rate: 7.04 %
- 15 Year Fixed Interest Rate: 6.43 %
- 7/6 SOFR ARM: 6.98 %