मुफ्त 72 के नियम का कैलकुलेटर
आपका पैसा दोगुना होने में कितना समय लगेगा, यह जानें। 72 के नियम से ब्याज दर के आधार पर अनुमान लगाएं।
%
Years to Double
9.0
Exact Years (ln2/r)9.01
Years to Double vs Annual Interest Rate
सूत्र
The Rule of 72
Years to Double ≈ 72 / Interest Rate
This is an approximation. The exact formula is:
Years = ln(2) / ln(1 + r)
The Rule of 72 is most accurate for rates between 6% and 10%.
हल किया गया उदाहरण
Your investment earns 8% annually.
- 01Rule of 72: 72 / 8 = 9.0 years
- 02Exact: ln(2) / ln(1.08) = 0.6931 / 0.07696 = 9.01 years
अक्सर पूछे जाने वाले प्रश्न
Why is it called the Rule of 72?
72 is used because it is easily divisible by many common interest rates (1, 2, 3, 4, 6, 8, 9, 12) and provides a close approximation.
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