Amortization Schedule & Payment Calculator

Developer
Bryan Fillmer
Size
2,961 Kb
Views
12,138

How do I make an amortization schedule & payment calculator?

Using Angular for easy display and such. Useful tool and a fun JS exercise.. What is a amortization schedule & payment calculator? How do you make a amortization schedule & payment calculator? This script and codes were developed by Bryan Fillmer on 11 December 2022, Sunday.

Amortization Schedule & Payment Calculator Previews
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Amortization Schedule & Payment Calculator - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>Amortization Schedule & Payment Calculator</title> <script src="https://s.codepen.io/assets/libs/modernizr.js" type="text/javascript"></script> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/5.0.0/normalize.min.css"> <link rel='stylesheet prefetch' href='http://maxcdn.bootstrapcdn.com/bootswatch/3.2.0/flatly/bootstrap.min.css'> <style> /* NOTE: The styles were added inline because Prefixfree needs access to your styles and they must be inlined if they are on local disk! */ body { padding: 2em;
}
section { max-width: 33em; margin: 0 auto;
} </style> <script src="https://cdnjs.cloudflare.com/ajax/libs/prefixfree/1.0.7/prefixfree.min.js"></script>
</head>
<body> <body ng-app="AmortApp"> <section ng-controller="AmortCalc as calc"> <h2>Amortization Schedule &amp Payment Calculator</h2> <form class="form-horizontal"> <fieldgroup> <legend>Loan Information</legend> <ul class="list-unstyled"> <li class="form-group"> <label class="col-sm-4 control-label">Principal</label> <div class="col-sm-6"><input type="number" class="form-control" ng-model="calc.principal" ng-change="calc.calcMonthlyPaymentAmount()"></div> </li> <li class="form-group"> <label class="col-sm-4 control-label">Annual Interest Rate</label> <div class="col-sm-3"><input type="number" class="form-control" placeholder="0.0%" ng-model="calc.interest" ng-change="calc.calcMonthlyPaymentAmount()"></div> </li> <li class="form-group"> <label class="col-sm-4 control-label">Years</label> <div class="col-sm-3"><input type="number" class="form-control" ng-model="calc.payments" ng-change="calc.calcMonthlyPaymentAmount()"></div> </li> </ul> <h4 class="row" ng-show="calc.monthlyPaymentAmount"> <div class="col-sm-6 text-muted">Per Month Payment:</div> <div class="col-sm-6">{{calc.monthlyPaymentAmount | currency}}</div> <div class="col-sm-6 text-muted">Total Payout:</div> <div class="col-sm-6">{{calc.totalPayoutAmount | currency}}</div> <div class="col-sm-6 text-muted">Total Interest:</div> <div class="col-sm-6">{{calc.totalInterestAmount | currency}}</div> </h4> </fieldgroup> </form> </section>
</body> <script src='http://ajax.googleapis.com/ajax/libs/angularjs/1.3.2/angular.min.js'></script> <script src="js/index.js"></script>
</body>
</html>

Amortization Schedule & Payment Calculator - Script Codes CSS Codes

body { padding: 2em;
}
section { max-width: 33em; margin: 0 auto;
}

Amortization Schedule & Payment Calculator - Script Codes JS Codes

(function () { /** * * @TODO * 1. Reduce watch frequency on monthly calculation. * 2. Refactor a bit for more sense. * 3. That whole schedule thing. * 4. Form element validation checking. * */ angular.module('AmortApp', [ ]); var AmortCalc = function () { var vm = this; vm.principal = null, vm.interest = null, vm.payments = null, vm.monthlyPaymentAmount = null, vm.totalPayoutAmount = null, vm.totalInterestAmount = null, vm.remainingBalance = null; var monthlyPayment = function (p, i, n) { return ( i * p * Math.pow(1 + i, n) ) / ( Math.pow(1 + i, n) - 1 ); }; var monthlyInterest = function (i) { return (i / 100) / 12; }; vm.calcMonthlyPaymentAmount = function () { if (null === vm.principal || null === vm.interest || null === vm.payments) { return null; } var mInterest = monthlyInterest(vm.interest); vm.monthlyPaymentAmount = monthlyPayment(vm.principal, mInterest, (vm.payments * 12)); vm.totalPayoutAmount = vm.monthlyPaymentAmount * (vm.payments * 12); vm.totalInterestAmount = vm.totalPayoutAmount - vm.principal; }; }; angular.module('AmortApp', [ ]).controller('AmortCalc', AmortCalc);
})();
Amortization Schedule & Payment Calculator - Script Codes
Amortization Schedule & Payment Calculator - Script Codes
Home Page Home
Developer Bryan Fillmer
Username bfillmer
Uploaded December 11, 2022
Rating 3
Size 2,961 Kb
Views 12,138
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