Excel公式爲JavaScript函數

Question

這是Excel公式，我有

fx = ROUNDUP(C17/((1-(1/(1+(C19/12))^(C18*12)))/(C19/12)),0) 

這是結果應該是：

這是我寫的javascript函數：

function refreshRenoLoanCalculator() { 

    var amt = parseInt($('.calc-renoloan .principal-amount').val().replace(/,/g, ''), 10) 
    console.log(amt); //10 000 
    var rate = $('.calc-renoloan .loan-rate').val(); 
    console.log(rate); //0.0444 
    var tenure = $('.calc-renoloan .loan-tenure').val(); 
    console.log(tenure); // 5 

    var a = rate/100./12.; 
    console.log(a); 
    var b = 1. + a; 
    b = Math.pow(b, (tenure * 12)) - 1.; 
    console.log(b); 
    var FC = a/b + a; 
    FC = FC.toFixed(10); 
    console.log(FC); 
    var RP = amt * FC; 
    console.log(RP); 




    toolsSetCalculatedValue('.calc-renoloan .calc-result-installment', Math.ceil(RP).toLocaleString().split('.')[0]) 
    $('.calc-renoloan .results-container').slideDown(); 

} 

在t他的時刻，我從Excel公式和JavaScript函數得到的結果是不一樣的。任何幫助將不勝感激。

Answer 1

在JS等效計算將是這樣：

var C17 = 10000; 
 
var C18 = 5; 
 
var C19 = 4.44; 
 

 
var interest = C19/1200; 
 
var foo = Math.ceil(C17 * interest/(1 - (Math.pow(1/(1 + interest), C18 * 12)))); 
 

 
console.log(foo);

的主要區別是利率的乘法（* 1200相對於* 12）作爲Excel存儲百分比值作爲浮分在0和1之間。

如果您願意以同樣的方式爲Excel來計算，那麼你需要輸入速率轉換成這樣：

var C17 = 10000; 
 
var C18 = 5; 
 
var C19 = 0.0444; // Note the difference here 
 

 
var interest = C19/12; // and here 
 
var foo = Math.ceil(C17 * interest/(1 - (Math.pow(1/(1 + interest), C18 * 12)))); 
 

 
console.log(foo);