Rule of 72 Calculator
Estimates how long money takes to double.
Result
- Years to double (rule of 72)
- 12.00 years
- Exact years to double
- 11.90 years
How to use the rule of 72 calculator
- Enter the annual return (%).
- The results update as you type, or press Calculate.
- Read the years to double (rule of 72) first, then the supporting figures below it.
Formula
Years ≈ 72 ÷ rate.
Worked example
For example, with these inputs:
- Annual return (%): 6
the calculator returns:
- Years to double (rule of 72): 12.00 years
- Exact years to double: 11.90 years
Background
Cars in Singapore carry costs found almost nowhere else, including the Certificate of Entitlement and the Additional Registration Fee. Loans are capped at 60% or 70% of the price depending on the car's Open Market Value, and the maximum tenure is seven years.
Calculators make it easy to compare scenarios side by side: a shorter tenure versus a lower instalment, a higher deposit versus more cash in hand, or paying down debt versus investing. Seeing the total cost, not just the monthly figure, usually makes the better choice obvious.
Frequently asked questions
How does the rule of 72 calculator work?
It applies this formula: Years ≈ 72 ÷ rate.
Is this financial advice?
No. It is a calculation tool. For decisions about loans or investments, compare official offer documents and consider speaking to a licensed adviser.