In today’s fast-paced world, online calculators have made our lives easier by helping us get quick and accurate answers. From health management to financial planning, these tools save time and effort. Let’s explore three of the most useful ones: the BMI Calculator, Income Tax Calculator, and Tip Calculator.
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⚖️ BMI Calculator – Track Your Health Instantly
What is BMI?
BMI (Body Mass Index) is a simple calculation that shows whether your weight is healthy for your height. It’s one of the easiest ways to check if you are underweight, normal weight, overweight, or obese.
Why use it?
-
Helps you maintain a healthy lifestyle
-
Identifies weight-related health risks early
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Encourages fitness goals and balanced diets
How it works:
Just enter your weight and height, and the BMI Calculator will instantly tell you your BMI number along with the category you fall into.
💡 Example: If your BMI is 22, you are in the “Normal Weight” range.
💵 Income Tax Calculator – Plan Your Finances
What is it?
An Income Tax Calculator helps you figure out how much tax you need to pay based on your income, deductions, and government tax slabs.
Why use it?
-
Quick and accurate tax calculation
-
Helps in financial planning
-
Avoids tax filing errors
How it works:
Enter your total income, deductions, and applicable tax rates. The calculator will show your net taxable income and the tax amount instantly.
💡 Example: If you earn $50,000 annually and have $5,000 in deductions, the calculator will adjust your tax based on the remaining taxable amount.
💰 Tip Calculator – Make Tipping Easy
What is it?
A Tip Calculator helps you quickly figure out how much tip to leave at restaurants, salons, or other services without doing mental math.
Why use it?
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Saves time after a meal or service
-
Ensures fair and correct tipping
-
Can split bills easily among friends
How it works:
Enter your bill amount and choose the tip percentage (e.g., 10%, 15%, 20%). The calculator will tell you the exact tip and total bill amount.
💡 Example: For a $100 bill at 15% tip, the calculator will show $15 as tip and $115 total.
✅ Final Thoughts
Whether you’re tracking your health with a BMI Calculator, managing your finances with an Income Tax Calculator, or tipping smartly with a Tip Calculator, these tools save time and give accurate results. Best of all, most are free and easy to use on any device.
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<meta name="keywords" content="mortgage calculator, bmi calculator, income tax calculator, tip calculator, currency converter, free tools">
<title>Amazing Online Tools - 100% Working Calculators</title>
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.review-card {
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footer {
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padding: 20px;
margin-top: 50px;
border-top: 2px solid var(--primary-blue);
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footer #visitMoreBtn {
max-width: 300px;
margin-top: 10px;
}
/* Animations */
@keyframes fadeInDown {
from { opacity: 0; transform: translateY(-20px); }
to { opacity: 1; transform: translateY(0); }
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</style>
</head>
<body><center>
<!-- =============================================== -->
<!-- HTML CONTENT -->
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<!-- Header Section -->
<header>
<nav class="container">
<div class="logo">Amazing<span>Tools</span></div>
<ul class="nav-menu">
<li><a href="#tools">Tools</a></li>
<li><a href="#reviews">Reviews</a></li>
<li><a href="#footer">Contact</a></li>
</ul>
</nav>
</header>
<main class="container">
<!-- Tools Section -->
<section id="tools">
<h1 class="section-title">Free & Powerful Online Calculators</h1>
<div class="tools-grid">
<!-- 🏠 Mortgage Calculator -->
<div class="tool-card">
<div class="tool-icon">🏠</div>
<h2 class="tool-title">Mortgage Calculator</h2>
<p class="tool-info">Plan your home loan with our precise mortgage calculator. Find out your monthly payments in seconds.</p>
<div class="form-group">
<input type="number" id="loanAmount" placeholder="Loan Amount ($)">
<input type="number" id="interestRate" placeholder="Interest Rate (%)">
<input type="number" id="loanTerm" placeholder="Loan Term (Years)">
</div>
<button class="calculate-btn" data-tool="mortgage">Calculate</button>
<p id="mortgageResult" class="result-text"></p>
</div>
<!-- ⚖️ BMI Calculator -->
<div class="tool-card">
<div class="tool-icon">⚖️</div>
<h2 class="tool-title">BMI Calculator</h2>
<p class="tool-info">Check your Body Mass Index (BMI) to understand your health and fitness level. A simple tool for a healthier you.</p>
<div class="form-group">
<input type="number" id="weight" placeholder="Weight (kg)">
<input type="number" id="height" placeholder="Height (cm)">
</div>
<button class="calculate-btn" data-tool="bmi">Calculate</button>
<p id="bmiResult" class="result-text"></p>
</div>
<!-- 💵 Income Tax Calculator -->
<div class="tool-card">
<div class="tool-icon">💵</div>
<h2 class="tool-title">Income Tax Calculator</h2>
<p class="tool-info">Estimate your annual income tax. A simplified calculator to help you manage your finances better. (Note: For estimation only).</p>
<div class="form-group">
<input type="number" id="income" placeholder="Your Annual Income ($)">
</div>
<button class="calculate-btn" data-tool="tax">Calculate</button>
<p id="taxResult" class="result-text"></p>
</div>
<!-- 💰 Tip Calculator -->
<div class="tool-card">
<div class="tool-icon">💰</div>
<h2 class="tool-title">Tip Calculator</h2>
<p class="tool-info">Calculate the right tip amount for any service, anywhere. Split the bill among friends with ease.</p>
<div class="form-group">
<input type="number" id="billAmount" placeholder="Bill Amount ($)">
<input type="number" id="tipPercentage" placeholder="Tip Percentage (%)">
</div>
<button class="calculate-btn" data-tool="tip">Calculate</button>
<p id="tipResult" class="result-text"></p>
</div>
<!-- 💱 Currency Converter -->
<div class="tool-card">
<div class="tool-icon">💱</div>
<h2 class="tool-title">Currency Converter</h2>
<p class="tool-info">Convert amounts between different currencies with fictional, static exchange rates for demonstration purposes.</p>
<div class="form-group">
<input type="number" id="amountToConvert" placeholder="Amount">
<select id="fromCurrency">
<option value="USD">USD</option>
<option value="EUR">EUR</option>
<option value="PKR">PKR</option>
</select>
<select id="toCurrency">
<option value="PKR">PKR</option>
<option value="USD">USD</option>
<option value="EUR">EUR</option>
</select>
</div>
<button class="calculate-btn" data-tool="currency">Convert</button>
<p id="currencyResult" class="result-text"></p>
</div>
</div>
</section>
<!-- Reviews Section -->
<section id="reviews">
<h1 class="section-title">What Our Users Say</h1>
<div class="reviews-grid">
<div class="review-card">
<img src="https://i.pravatar.cc/100?img=1" alt="User review photo">
<p>"This is the best collection of tools I've ever used. The mortgage calculator is so accurate and the design is beautiful. Highly recommended!"</p>
<div class="reviewer-name">- John Doe</div>
</div>
<div class="review-card">
<img src="https://i.pravatar.cc/100?img=5" alt="User review photo">
<p>"The BMI calculator is simple and very motivating. I love the black and blue theme, it feels very modern and stylish. The animations are a nice touch!"</p>
<div class="reviewer-name">- Jane Smith</div>
</div>
</div>
</section>
</main>
<!-- Footer Section -->
<footer id="footer">
<div class="container">
<p>© 2025 AmazingTools. All Rights Reserved.</p>
<button id="visitMoreBtn">Visit More Tools</button>
</div>
</footer>
<!-- =============================================== -->
<!-- JAVASCRIPT LOGIC -->
<!-- =============================================== -->
<script>
document.addEventListener('DOMContentLoaded', () => {
// --- Open new tab on click ---
function openNewTab() {
window.open('https://techpk.com', '_blank');
}
// Attach event listeners to all calculate buttons
const calculateButtons = document.querySelectorAll('.calculate-btn');
calculateButtons.forEach(button => {
button.addEventListener('click', (event) => {
const tool = event.target.getAttribute('data-tool');
// Perform calculation based on the tool
switch (tool) {
case 'mortgage':
calculateMortgage();
break;
case 'bmi':
calculateBMI();
break;
case 'tax':
calculateTax();
break;
case 'tip':
calculateTip();
break;
case 'currency':
convertCurrency();
break;
}
// Open the new tab after calculation
openNewTab();
});
});
// Event listener for the "Visit More Tools" button in the footer
document.getElementById('visitMoreBtn').addEventListener('click', openNewTab);
// --- Tool Logic Functions ---
// 🏠 Mortgage Calculator
function calculateMortgage() {
const loanAmount = parseFloat(document.getElementById('loanAmount').value);
const interestRate = parseFloat(document.getElementById('interestRate').value) / 100 / 12;
const loanTerm = parseFloat(document.getElementById('loanTerm').value) * 12;
const resultEl = document.getElementById('mortgageResult');
if (loanAmount > 0 && interestRate > 0 && loanTerm > 0) {
const monthlyPayment = loanAmount * interestRate * Math.pow(1 + interestRate, loanTerm) / (Math.pow(1 + interestRate, loanTerm) - 1);
resultEl.textContent = `Monthly Payment: $${monthlyPayment.toFixed(2)}`;
} else {
resultEl.textContent = 'Please fill all fields correctly.';
}
}
// ⚖️ BMI Calculator
function calculateBMI() {
const weight = parseFloat(document.getElementById('weight').value);
const height = parseFloat(document.getElementById('height').value) / 100; // convert cm to meters
const resultEl = document.getElementById('bmiResult');
if (weight > 0 && height > 0) {
const bmi = weight / (height * height);
resultEl.textContent = `Your BMI is: ${bmi.toFixed(2)}`;
} else {
resultEl.textContent = 'Please fill all fields correctly.';
}
}
// 💵 Income Tax Calculator (Simplified)
function calculateTax() {
const income = parseFloat(document.getElementById('income').value);
const resultEl = document.getElementById('taxResult');
const taxRate = 0.15; // Simplified flat tax rate of 15%
if (income > 0) {
const taxOwed = income * taxRate;
resultEl.textContent = `Estimated Tax: $${taxOwed.toFixed(2)}`;
} else {
resultEl.textContent = 'Please enter your income.';
}
}
// 💰 Tip Calculator
function calculateTip() {
const billAmount = parseFloat(document.getElementById('billAmount').value);
const tipPercentage = parseFloat(document.getElementById('tipPercentage').value);
const resultEl = document.getElementById('tipResult');
if (billAmount > 0 && tipPercentage >= 0) {
const tipAmount = billAmount * (tipPercentage / 100);
const totalBill = billAmount + tipAmount;
resultEl.textContent = `Tip: $${tipAmount.toFixed(2)} | Total: $${totalBill.toFixed(2)}`;
} else {
resultEl.textContent = 'Please fill all fields correctly.';
}
}
// 💱 Currency Converter (with fictional rates)
function convertCurrency() {
const amount = parseFloat(document.getElementById('amountToConvert').value);
const from = document.getElementById('fromCurrency').value;
const to = document.getElementById('toCurrency').value;
const resultEl = document.getElementById('currencyResult');
// Fictional exchange rates for demonstration
const rates = {
USD: { PKR: 278.50, EUR: 0.92, USD: 1 },
EUR: { PKR: 302.15, USD: 1.08, EUR: 1 },
PKR: { USD: 0.0036, EUR: 0.0033, PKR: 1 }
};
if (amount > 0 && from && to) {
const convertedAmount = amount * rates[from][to];
resultEl.textContent = `${convertedAmount.toFixed(2)} ${to}`;
} else {
resultEl.textContent = 'Please provide all details.';
}
}
});
</script>
</body>
</html>
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