关于本计算器
Years to double money at a rate, or the rate needed for a horizon.
72法则
资金翻倍所需年数。
输入计算参数
计算结果摘要
翻倍所需年数9
利率 (%)8%
精确值9.01
常见问题
Rule?
Years ≈ 72 ÷ rate percent.
Exact check?
Shown alongside via ln(2)/ln(1+r).
Best range?
Most accurate around 6–10%.