Free Online Calculators

Yes! All 50+ calculators on Shawon Calculators are completely free to use. There are no hidden fees, no premium tiers, and no subscription required. You can use our tools as many times as you need.

Absolutely. All calculations are performed 100% in your browser using JavaScript. No data is ever sent to our servers or any third parties. Your financial information, health data, and personal details never leave your device.

No, you don't need to create an account or sign up. All our calculators are instantly accessible without any registration. Simply open the calculator you need and start calculating right away.

Yes! Shawon Calculators is fully responsive and works perfectly on smartphones, tablets, and desktop computers. The interface automatically adapts to your screen size for the best experience.

Our calculators use industry-standard formulas and are designed to provide accurate results. For financial calculators like mortgages, we use the standard amortization formula. Health calculators like BMI use WHO-approved formulas. However, results should be used for informational purposes and not as professional advice.

Yes! Once you've loaded a calculator page, it works completely offline. All calculations are performed in your browser, so you can continue using the tool even without an internet connection.

We offer six main categories: Financial (mortgage, loans, compound interest), Health & Fitness (BMI, calories, body fat), Developer Tools (password generator, Base64, binary converter), Math & Science (percentages, statistics), Date & Time (age calculator, date difference), and Everyday Utilities (unit converters, GPA calculator).

Yes! Most of our calculators support printing results directly from the page. You can also copy results to your clipboard with a single click. Some advanced calculators like the mortgage calculator show detailed amortization schedules you can print.

We use the standard amortization formula: M = P[r(1+r)^n]/[(1+r)^n-1], where M is the monthly payment, P is the principal loan amount, r is the monthly interest rate, and n is the number of payments. This is the same formula used by banks and financial institutions.

BMI (Body Mass Index) is a measure of body fat based on height and weight. It's calculated as: BMI = weight(kg) / height(m)². A BMI under 18.5 is underweight, 18.5-24.9 is normal, 25-29.9 is overweight, and 30+ is obese. Note that BMI doesn't account for muscle mass or body composition.