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Why Use Instant Calculator?
Instant Calculator is your trusted companion for accurate and fast calculations. Whether you are a student, business owner, investor, or health enthusiast, our suite of 100% free online calculators helps you make informed decisions instantly. From planning your SIP investments to checking your BMI or estimating Solar Panel output, we cover it all.
Frequently Asked Questions
Are these calculators accurate?
Yes, all our calculators use standard financial and mathematical formulas trusted by professionals. For example, our SIP calculator uses the compound interest formula M = P × ({[1+i]^n - 1} / i) × (1+i), and our EMI calculator uses the standard reducing balance formula. For critical financial decisions, always consult a certified advisor.
Is Instant Calculator free to use?
Absolutely! All 149+ tools — including SIP, EMI, BMI, GST, Income Tax, and business calculators — are completely free with no hidden charges, no sign-up, and no ads blocking the results.
Do you store my data?
No. All calculations happen entirely in your browser using JavaScript. We never store your financial inputs, health data, or any personal information. Your data stays completely private.
How do I calculate my EMI for a home loan?
Use our Home Loan EMI Calculator. Enter your loan amount, annual interest rate, and loan tenure in years. The calculator instantly shows your monthly EMI, total interest payable, and total amount paid. For a ₹50 lakh loan at 8.5% for 20 years, your EMI would be approximately ₹43,391.
What is SIP and how does the SIP calculator work?
SIP (Systematic Investment Plan) is a method to invest a fixed amount regularly in mutual funds. Our SIP Calculator calculates how your monthly investment grows over time using compound interest. For example, investing ₹5,000/month at 12% for 10 years gives you approximately ₹11.6 lakhs.
How is GST calculated in India?
GST (Goods and Services Tax) in India has four main rates: 5%, 12%, 18%, and 28%. To add GST: Tax Amount = (Original Price × GST Rate) / 100. Our GST Calculator lets you add or remove GST from any amount instantly with just two inputs.
How to calculate income tax for FY 2025-26?
Under the new tax regime for FY 2025-26, income up to ₹3 lakh is tax-free. Use our Income Tax Calculator to compare your tax liability under both old and new regimes and choose the best option for your situation.
What is a normal BMI range?
A BMI (Body Mass Index) between 18.5 and 24.9 is considered normal/healthy. Below 18.5 is underweight, 25–29.9 is overweight, and 30+ is obese. Use our BMI Calculator to check your status instantly — just enter your weight in kg and height in cm.