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Detailed guides to help you make better financial decisions
Toolwala.in is India's free online financial calculator platform. We provide easy-to-use, accurate calculators for EMI, GST, income tax, salary, investments, and everyday needs — all in one place with no signup required.
Whether you are planning a home loan, calculating your take-home salary, estimating GST on a purchase, or tracking your savings growth, Toolwala.in gives you instant, reliable answers at zero cost.
An EMI (Equated Monthly Instalment) calculator helps you find out how much you need to pay each month for a loan. The formula used is: EMI = P × r × (1+r)ⁿ / ((1+r)ⁿ − 1) where P is principal, r is monthly interest rate, and n is number of months.
Tip: A longer tenure lowers your monthly EMI but increases total interest paid. Always compare EMIs across different tenure options before finalising your loan.
GST (Goods and Services Tax) is applied to goods and services in India at rates of 5%, 12%, 18%, or 28% depending on the category. Our GST calculator helps you add or remove GST from any amount in seconds.
Browse all the free tools available on Toolwala.in. New calculators are added regularly to cover more financial needs.
| Calculator | Category | What It Does |
|---|---|---|
| EMI Calculator | Loan | Monthly instalment for home, car, or personal loans |
| Personal Loan Calculator | Loan | Total cost and EMI for personal loans |
| GST Calculator | Tax | Add or remove GST at any slab rate |
| Income Tax Calculator | Tax | Estimate your annual income tax under new & old regime |
| Salary Calculator | Finance | Calculate take-home pay after PF, TDS, and deductions |
| Savings Calculator | Investment | Plan your savings goal and see future value |
| Compound Interest | Investment | Calculate investment growth with compounding |
| Discount Calculator | Everyday | Final price after any percentage discount |
| Percentage Calculator | Everyday | Calculate percentages, increase, decrease, and ratios |
| BMI Calculator | Health | Body Mass Index and health category |
Everything you need to know about Toolwala.in
Absolutely not! There are no hidden fees or costs to use any of the tools on Toolwala.in. No signups, no credit card, no catches — everything is 100% free.
Our calculations are of professional standard. For financial tools such as EMI and tax calculators, we regularly update the formulas to reflect the latest government guidelines and rates.
Yes! All tools are fully responsive and optimized for smartphones, tablets, and desktops. They work seamlessly across all modern browsers and devices.
No. All calculations happen directly in your browser. We do not store, transmit, or share any of the numbers you enter into our calculators. Your data stays private.
EMI is calculated using the formula: EMI = P × r × (1+r)ⁿ ÷ ((1+r)ⁿ − 1) where P is the principal loan amount, r is the monthly interest rate (annual rate ÷ 12 ÷ 100), and n is the total number of monthly instalments. Our EMI calculator applies this formula instantly so you do not need to do the math manually.
India has four main GST rate slabs: 5% (essential goods like packed food, economy hotels), 12% (processed food, computers), 18% (most services, electronics, appliances), and 28% (luxury goods, automobiles, tobacco). Some items such as fresh vegetables, milk, and healthcare services are exempt from GST. Our GST calculator supports all four slabs.
Under the new tax regime (FY 2024–25), income up to ₹3 lakh is tax-free. Slabs: ₹3–7 lakh at 5%, ₹7–10 lakh at 10%, ₹10–12 lakh at 15%, ₹12–15 lakh at 20%, and above ₹15 lakh at 30%. A standard deduction of ₹75,000 is also available for salaried individuals. Our Income Tax Calculator handles both old and new regime comparisons automatically.
Simple Interest (SI) is calculated only on the original principal: SI = P × R × T / 100. Compound Interest (CI) is calculated on the principal plus accumulated interest, meaning you earn “interest on interest.” Over time, compound interest grows significantly faster than simple interest, making it powerful for long-term investments like FDs, mutual funds, and SIPs. Use our Compound Interest Calculator to see the difference for your amount.
Yes! Our Salary Calculator computes your in-hand (take-home) salary by deducting Employee PF (12% of basic salary), Professional Tax (state-specific), and estimated TDS based on your income tax slab. Simply enter your CTC or gross salary and the calculator breaks down all components including HRA, basic salary, allowances, and net pay deposited to your account.
BMI (Body Mass Index) is calculated as: BMI = Weight (kg) ÷ Height (m)². Enter your weight in kg and height in cm or feet in our BMI Calculator. Results are interpreted as: Below 18.5 — Underweight; 18.5–24.9 — Normal weight; 25–29.9 — Overweight; 30 and above — Obese. For South Asians, a BMI above 23 may indicate increased health risk. Always consult a doctor for personalized health advice.
You can take a screenshot of your results at any time. Some of our calculators also display a printable summary — simply use your browser's print function (Ctrl+P or Cmd+P) to save results as a PDF. We are continuously improving our tools and plan to add a download-as-PDF option for more calculators in future updates.