Free Online Calculators for Every Indian Need
Finance, Health, Math & Education
From EMI and SIP to BMI and GPA, get accurate answers in seconds. All tools are free, work in your browser, and need no signup.
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Most-used calculators this week
Age Calculator
Calculate your exact age in years, total months, and total days from any date of birth — accurate down to the day.
BMI Calculator
Calculate your Body Mass Index in seconds — with WHO categories and Asian-specific cutoffs.
Calorie Calculator
Daily calorie needs to maintain, lose, or gain weight — based on your BMR and activity level.
Compound Interest Calculator
See how a one-time principal grows under compound interest at any rate, tenure, and compounding frequency (daily, monthly, quarterly, yearly).
Currency Converter
Convert between 30 major world currencies instantly with reference rates — see the converted amount, exchange rate, and inverse rate.
EMI Calculator
Calculate Equated Monthly Instalments for home, personal, car, and education loans — with interest split and total payable.
GPA Calculator
Calculate your semester GPA on the 4.0 scale — weighted by credit hours, with the standard letter-to-GPA conversion table.
Mortgage Calculator
Calculate monthly mortgage payments — principal and interest split, total interest paid, and full payment schedule.
Browse by Category
25 calculators across 4 categories
Finance
Loans, investments, taxes, and money
Capital Gains Tax Calculator
Estimate 2026 federal tax on a stock, crypto, or property sale — short-term gains at ordinary rates vs long-term gains at 0%, 15%, or 20%.
CIBIL Score Estimator
Estimate where your CIBIL score sits based on credit habits — utilisation, payment history, account age, and inquiries.
Compound Interest Calculator
See how a one-time principal grows under compound interest at any rate, tenure, and compounding frequency (daily, monthly, quarterly, yearly).
Currency Converter
Convert between 30 major world currencies instantly with reference rates — see the converted amount, exchange rate, and inverse rate.
Health
BMI, calories, fitness and wellness
Age Calculator
Calculate your exact age in years, total months, and total days from any date of birth — accurate down to the day.
BMI Calculator
Calculate your Body Mass Index in seconds — with WHO categories and Asian-specific cutoffs.
Calorie Calculator
Daily calorie needs to maintain, lose, or gain weight — based on your BMR and activity level.
Pregnancy Due Date
Estimate your baby's due date.
Most Popular
Top calculators of all time
Age Calculator
Calculate your exact age in years, total months, and total days from any date of birth — accurate down to the day.
BMI Calculator
Calculate your Body Mass Index in seconds — with WHO categories and Asian-specific cutoffs.
Calorie Calculator
Daily calorie needs to maintain, lose, or gain weight — based on your BMR and activity level.
Capital Gains Tax Calculator
Estimate 2026 federal tax on a stock, crypto, or property sale — short-term gains at ordinary rates vs long-term gains at 0%, 15%, or 20%.
From the Blog
Practical guides behind the numbers
HELOC Explained: How a Home Equity Line of Credit Works
Turn home equity into a credit line you can tap — how a HELOC works, how it differs from a home equity loan, what you can borrow, and the real risks.
Roth IRA Explained: How It Works, Limits & Rules
Pay tax now, never again. How a Roth IRA works, who can open one, the 2026 limits, and the withdrawal rules most people get wrong.
Why Your Money Buys Less Every Year (Inflation, Explained)
A coffee that ran $3 a decade back now costs $4.50, and the cash in your savings is quietly shrinking. Here's the plain math behind inflation, plus what $100 today is really worth in 10 and 25 years.
Start Calculating in Seconds Beautifully.
Pick a category, enter your numbers, and get clear results with step-by-step explanations. No charges, no ads in the way of your work.
Explore All 25 ToolsExplore 25 ToolsWhy AllSmartCalculators?
AllSmartCalculators is a free online toolkit built for everyday Indian needs: home loan EMIs, SIP returns, GST on a bill, GPA conversions, BMI checks, age in days, percentage of a number, and more of the sums you do every week. Every calculator works directly in your browser, on phone or laptop, with no signup, no app install and no hidden charges.
Finance, Health, Math & Education
The site covers Finance, Health, Math and Education. Whether you need to work out the EMI on a Rs 35 lakh home loan, compare the old and new income tax regime, plan a 15-year SIP for your child's college, check BMI for an Indian adult, work out the GST on a bill or calculate your GPA for the semester, there is a dedicated tool for it.
Built for Accuracy and Privacy
Formulas are based on trusted sources: RBI for interest computations, GSTN for tax slabs, WHO for BMI bands, and SEBI guidance for mutual fund return assumptions. Inputs you type stay on your device for the calculation itself, and we follow privacy practices that line up with Google Consent Mode v2, GDPR and India's DPDP Act.
How to Get Started
Pick a category from the menu, open the calculator you need, enter your numbers, and read the result along with the step-by-step working shown below. Bookmark your most-used tools (EMI, SIP, BMI, percentage) so you can come back in one click.
Free, Fast, Honest
There is no paywall, no premium tier and no spammy email funnel. The site is funded by unobtrusive ads, which keeps the calculators free for students, salaried professionals, parents and small business owners across India. Spot an error or want a new calculator added? Email us at allsmartcalculators@gmail.com and we'll take a look.