Professional-grade calculators for accurate financial calculations. NEW: Updated with latest GST rates - Automobiles now 18%, daily essentials 5%, education items 0%! Learn more with our GST guide and investment guides.
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Advanced financial tools trusted by professionals across India
Generate GST-compliant invoices with automated calculations, customer database, and instant PDF export. Perfect for businesses and freelancers. Complete GST Invoice Generator Guide.
Calculate GST with the latest government-announced rates! Automobiles now 18%, daily essentials 5%, education items 0%. Full CGST, SGST, IGST breakup with charts. Read our complete GST guide.
Calculate loan EMI with amortization schedule, prepayment options, and interest savings analysis. Perfect for home and personal loans. Check our EMI planning guide.
Plan your investments with SIP calculator featuring goal planning, inflation adjustment, and wealth projections. Learn SIP strategies in our guide.
Split group expenses fairly with tip, tax, discounts, exclusions, and weighted shares. Download individual PDFs for each person.
Convert between units of length, weight, temperature, volume, area, time, speed, and data with precision and history.
Calculate compound interest with regular contributions, different compounding frequencies, and detailed wealth projections.
Calculate percentages, percentage increase/decrease, percentage change, and percentage difference with step-by-step explanations. Perfect for students, business, and competitive exams. Check our complete percentage guide.
Smart decision tool for property investment with break-even analysis, cash flow comparison, and ROI calculations.
Medical-grade analysis of habit impact on health and finances. Calculate life years at risk and potential savings from quitting.
Learn from our guides and tutorials
Historic Diwali gift! Complete guide to new GST rates - automobiles at 18%, daily essentials at 5%, education items at 0%. Use our online GST calculator with updated rates.
Read Full Guide →Learn systematic investment planning with our advanced SIP calculator. Plan for retirement, education, and wealth building goals with compound interest projections.
Read Full Guide →Master home loan planning with our EMI calculator, prepayment strategies, and interest savings analysis. Compare with rent vs buy decisions.
Read Full Guide →Understand the magic of compound interest with real examples, calculations, and wealth-building strategies.
Read Full Guide →Convert units for engineering, cooking, and daily use with our easy converter tool.
Read Full Guide →Create professional GST invoices with CGST SGST IGST calculation, HSN codes, and instant PDF download. Complete compliance guide for businesses.
Read Full Guide →Learn to split group expenses fairly with tips, taxes, and individual shares. Perfect for friends and colleagues.
Read Full Guide →Learn percentage math with our guide. Get formulas for increase, decrease, and change with step-by-step examples.
Read Full Guide →Make smart property choices with ROI analysis, cash flow, and break-even calculations.
Read Full Guide →Medical-grade analysis of habit impact on health and finances. Calculate life years at risk and potential savings from quitting.
Read Full Guide →Everything you need to know about SmartCalcs tools and features
Yes, absolutely! Our calculators use industry-standard formulas and are regularly updated for accuracy. All calculations are verified by certified accountants and financial experts. We update our GST calculator with the latest government rates, including the historic Diwali 2025 reform.
Our verification process includes:
Your privacy is our top priority. All calculations happen locally in your browser - we never store, transmit, or access your financial data. No registration required, no data collection, complete privacy guaranteed.
Our privacy commitment includes:
Yes! All calculators are 100% free forever. No hidden fees or subscriptions. Everyone should have access to financial tools. We may show ads later, but all features stay free.
Our free service includes:
We believe financial literacy should be accessible to everyone, regardless of income level.
Absolutely! All SmartCalcs tools are fully responsive and work perfectly on smartphones, tablets, and desktop computers. You can even install SmartCalcs as an app on your device for quick access.
Our GST calculator has all 2025 rates: 0%, 5%, 12%, 18%, and 28%. Updated with Diwali changes - cars 18%, daily items 5%, education 0%. Calculates CGST, SGST, and IGST.
Yes! Download PDF reports for GST, EMI, SIP, and more. Great for sharing with your accountant or keeping records.
This website's content is based on official information from:
Written by: SmartCalcs Expert Team
Reviewed by: Certified Financial Planners, Tax Experts, and Investment Advisors
Last Updated: September 28, 2025
This website is for informational purposes only and should not be considered as professional financial, tax, legal, or investment advice. Financial regulations and rates are subject to change. Always consult with qualified professionals for personalized advice.
While we strive to keep the information up-to-date and correct, we make no representations or warranties of any kind about the completeness, accuracy, reliability, suitability, or availability of the information contained in this website.