复利与投资

用于处理投资和复利的好用函数

复利

$1,000 after 3 years at 7% | $1,225.04

默认假设的是每年复利周期，但您也可以指定按月或按季复利周期：

$1,000 for 3 years at 7% compounding monthly   | $1,232.93
$1,000 for 3 years at 7% compounding quarterly | $1,231.44

您还可以获取特定时间段产生的利息：

interest on $1,000 after 3 years @ 7%                      | $225.04
interest on $1,000 for 3 years at 7% compounding monthly   | $232.93
interest on $1,000 for 3 years at 7% compounding quarterly | $231.44

投资回报率 (ROI)

$500 invested $1,500 returned                                  | 2x
annual return on $1,000 invested $2,500 returned after 7 years | 13.99%

未来资金的现值

present value of $1,000 after 20 years at 10% | $148.64