作者：乔山办公网日期：
返回目录：excel表格制作
利用函数PPMT(rate,per,nper,pv,fv,type)计算本金，IPMT函数计算利息
本金＝PPMT(各期利率,第几期,总期数,本金）
利息＝IPMT(各期利率,第几期,总期数,本金）
Excel中的PMT函数，通过单、双变量的模拟运算来实现的利息计算。
PMT函数可基于利率及等额分期付款方式，根据利率、定期付款和金额，来求出每期(一般为每月)应偿还的金额。PMT函数的格式和应用方式：
PMT(Rate，Nper，Pv，Fv，Type)
其中各参数的含义如下：
Rate：各期利率，例如，如果按8.4%的年利率借入一笔来购买住房，并按月偿还，则月利率为8.4%/12(即0.7%)。用户可以在公式中输入8.4%/12、0.7%或0.007作为Rate的值。
Nper：期数，即该项的付款期总数。例如，对于一笔10年期按月偿还的住房，共有10×12(即120)个偿款期数。可以在公式中输入120作为Nper的值。
Pv：现值，或一系列未来付款的当前值的累积和，也就是金额。
Fv：指未来终值，或在最后一次付款后希望得到的现金余额。如果省略Fv，则假设其值为零，也就是一笔的未来值为零，一般银行此值为0。
2、等额本金
利息计算＝（本金 — 已归还本金累计额）×每月利率
每月还款＝（本金 / 还款月数）+（本金 — 已归还本金累计额）×每月利率
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