balance transfer calculator

docs/resources/balance_transfer_calc.md

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+---
+title: Balance Transfer Calculator
+hide:
+    - toc
+---
+<script>
+    function calculateTransfer() {
+        // Get user input values
+        let amountToTransfer = parseFloat(document.getElementById("amountToTransfer").value);
+        const balanceTransferFee = parseFloat(document.getElementById("balanceTransferFee").value);
+        const balanceTransferDuration = parseInt(document.getElementById("balanceTransferDuration").value);
+        const plannedMonthlyPayment = parseFloat(document.getElementById("plannedMonthlyPayment").value);
+        // Check if any fields are empty
+        if (!amountToTransfer || !balanceTransferFee || !balanceTransferDuration || !plannedMonthlyPayment) {
+            document.getElementById("result").innerHTML = "<strong style='color: red;'>Please fill in all fields.</strong>";
+            return; // Exit the function if validation fails
+        }
+        // Initialise Variables
+        let totalTimeToPay = 0;
+        let feePaid = 0;
+        const initialAmountToTransfer = amountToTransfer;
+
+        while (amountToTransfer > plannedMonthlyPayment) {
+            let amountTransferred = amountToTransfer * (1 + balanceTransferFee / 100);
+            let totalTimeRequired = amountTransferred / plannedMonthlyPayment;
+
+            if (totalTimeRequired > balanceTransferDuration) {
+                feePaid += amountToTransfer * (balanceTransferFee / 100);
+                amountToTransfer = amountTransferred - (plannedMonthlyPayment * balanceTransferDuration);
+                totalTimeToPay += balanceTransferDuration;
+            } else {
+                totalTimeToPay += totalTimeRequired;
+                amountToTransfer = amountTransferred - (plannedMonthlyPayment * totalTimeRequired);
+            }
+        }
+
+        // Display results
+        const result = `
+            To pay off <strong>£${initialAmountToTransfer}</strong> using monthly payments of <strong>£${plannedMonthlyPayment}</strong> with a <strong>${balanceTransferDuration} months</strong> balance transfer renewed until the whole amount is paid off and each renewal has a balance transfer fee of <strong>${balanceTransferFee} %</strong>, one will pay a total fee of <strong>£${feePaid.toFixed(2)}</strong> and will need to make the monthly payment for <strong>${Math.round(totalTimeToPay)} months</strong>. 
+            
+            Balance transfer will need to be renewed at least <strong>${Math.round(totalTimeToPay / balanceTransferDuration)} times</strong>.
+        `;
+        document.getElementById("result").innerHTML = result;
+    }
+</script>
+
+## Balance Transfer Calculator
+
+<div class="grid cards" markdown>
+-   **Amount to Transfer (£):** 
+
+    --- 
+
+    <input class="md-input" type="number" id="amountToTransfer" required>
+
+-   **Balance Transfer Fee (%):** 
+
+    --- 
+
+    <input class="md-input" type="number" id="balanceTransferFee" required>
+
+</div>
+
+<div class="grid cards" markdown>
+-   **Balance Transfer Duration (months):**
+
+    --- 
+
+    <input class="md-input" type="number" id="balanceTransferDuration" required>
+
+-   **Planned Monthly Payment (£):** 
+
+    --- 
+
+    <input class="md-input" type="number" id="plannedMonthlyPayment" required>
+
+</div>
+
+<p align="center"><a class="md-button" onclick="calculateTransfer()">Calculate <span class="twemoji"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M7 2h10a2 2 0 0 1 2 2v16a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2m0 2v4h10V4zm0 6v2h2v-2zm4 0v2h2v-2zm4 0v2h2v-2zm-8 4v2h2v-2zm4 0v2h2v-2zm4 0v2h2v-2zm-8 4v2h2v-2zm4 0v2h2v-2zm4 0v2h2v-2z"></path></svg></span></a></p>
+
+
+<p id="result"></p>
+