Are the tools really free?

Yes, all tools are completely free to use. No registration required, no hidden fees, and no limits on usage.

Absolutely. All processing happens directly in your browser. Your files and data are never uploaded to our servers, ensuring complete privacy and security.

Do I need to install any software?

No installation required. All tools work entirely in your web browser.

Free Online Calculators

India-specific calculators for loan EMI, GST tax amounts, and TNEB electricity bills. All calculations happen in your browser — no data is stored or shared.

India-Specific No Signup 100% Free

All Calculators

Popular

EMI Calculator

Calculate monthly loan EMI, total interest, and view a full amortization schedule. Supports home, car, personal, and education loans.

Home loan at 8.5% for 20 years
Car loan at 10% for 5 years
Personal loan at 14% for 3 years

Open Calculator

Popular

GST Calculator

Calculate CGST, SGST, and IGST amounts for any rate (5%, 12%, 18%, 28%). Supports both tax-inclusive and tax-exclusive modes.

Add 18% GST to a ₹10,000 invoice
Extract GST from an inclusive price
Split CGST and SGST for intra-state supply

Open Calculator

TNEB Bill Calculator

Calculate Tamil Nadu Electricity Board (TNEB) electricity bill based on current slab rates. Includes tariff explanation and slab breakdown.

Domestic consumer using 200 units
Calculate bill across multiple slabs
Understand fixed charges vs energy charges

Open Calculator

Your Financial Data Stays Private

Financial calculations involve sensitive numbers — loan amounts, salaries, and business revenue. All calculations on Rookies Junction run entirely in your browser. Nothing is sent to any server, stored, or used for analytics.

All math runs client-side — no server required.

No account or registration needed.

Results are never logged or stored.

Disclaimer: These calculators are for informational purposes only. Always consult a qualified financial advisor or the official government portal for authoritative figures.