Free Online Calculators — Age, BMI, EMI, Interest & More

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Free Online Calculators — Age, BMI, EMI, GST & More

16 fast, accurate calculators for everyday life — money, health, dates, shopping, and India-specific tax needs.

🚫 No Signup ⚡ Instant Results 📱 Mobile & Desktop 🌍 Works Worldwide 🇮🇳 India Tools Included

Whether you are calculating your exact age, checking your BMI, planning a loan EMI, splitting a restaurant bill, finding how much interest a deposit will earn, or adding GST to an invoice — this page collects every calculator on FormatPotter in one place. Each one opens instantly, runs entirely in your browser, and gives you an answer without signup or ads interrupting your work. Use the search box to jump straight to a calculator, or browse by category below.

🎯 Everyday Use

🎂 Age Calculator Find your exact age in years, months, and days. % Percentage Calculator 5 percentage calculations in one tool. 📅 Date Difference Days, weeks, and months between any two dates. 🍽️ Tip Calculator Calculate tip and split the bill between people.

🏥 Health & Fitness

⚖️ BMI Calculator Check your body mass index and weight category. 🔬 Body Fat Calculator US Navy method body fat percentage. 🍎 Calorie Calculator Daily calorie needs (TDEE) for your goals. 🔥 BMR Calculator Basal metabolic rate — calories at rest. 🎯 Ideal Weight Calculator Healthy weight range for your height. 💧 Water Intake Calculator Daily water needs based on weight and activity.

💰 Money & Finance

🏦 EMI Calculator Monthly EMI, total interest, and payment breakdown. 📋 Loan Calculator Monthly payment and year-by-year amortization. 📈 Simple Interest SI, total amount, and maturity value. 📊 Compound Interest Future value with daily, monthly, or yearly compounding. 🏷️ Discount Calculator Sale price, savings, and stacked coupons.

🇮🇳 India-Specific Calculators

🧾 GST Calculator Add or remove GST with CGST, SGST, and IGST split.

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Frequently Asked Questions

Are these calculators free to use?

Yes. Every calculator on this page is completely free with no signup, no watermark, and no hidden limits.

Do I need to create an account?

No signup is required for any calculator. Just open the page and start using it.

Do these calculators work on mobile?

Yes. All calculators are fully responsive and work on Chrome, Edge, Safari, and other modern mobile browsers.

Are my numbers sent to a server?

No. Every calculation happens locally in your browser. Your data never leaves your device.

Can I bookmark a specific calculator?

Yes. Each calculator has its own page, so you can bookmark it and return to it any time.

Do you have India-specific calculators?

Yes. We have a GST Calculator for India with CGST, SGST, and IGST split. More India-specific tools like income tax, HRA, and SIP calculators are coming soon.