Interactive Financial & Utility Suite

100% Free Calculators by 99tools

Make instant, pinpoint-accurate calculations in seconds. Designed for personal finance, salary taxes, network engineering, and health metrics — no logins, signups, or downloads required.

💳 EMI Loan Calculator

Calculate monthly loan repayments, interest rates & total amortization schedule
₹ 1,000,000
8.5 %
10 Years
Monthly EMI Payment
₹ 12,399
Total Interest:
₹ 487,880
Total Amount Payable:
₹ 1,487,880

Explore All Calculators

All tools client-side & free
100% Free

EMI Calculator

Calculate monthly loan repayments, interest rates, and total payable amount with real-time sliders.
FY 2025-26

Income Tax Calculator

Compare Old vs New Tax Regimes in India, apply 80C deductions, and find the smartest tax saving choice.
Instant

Age & Birthday Calculator

Calculate exact age down to the day, total months, days lived, and countdown to your next birthday.
Health

Body Mass Index (BMI) Calculator

Find your healthy weight index score with instant category badges (Underweight, Normal, Overweight, Obese).