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Numbers in. Answers out.
Money, marks, shopping, health and everyday decisions — get the number you need without opening a spreadsheet.
CGPA calculator
Built for college students — enter subjects and credits, get your CGPA and percentage instantly.
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Your shortcut to the answer
What are you calculating?
Pick a tool, drop in your numbers, and get a clear result instantly.
CGPA calculator
10-point scale CGPA for Indian college & university students — add every subject's grade point and credits.
Percentage is estimated as CGPA × 9.5, the formula most Indian universities (including UGC-affiliated ones) use — check your own institution's exact conversion factor for official purposes.
How to use: Add each subject with its grade point (0–10, per your university's scale) and credit hours — your weighted CGPA and estimated percentage update instantly. Use it every semester to track your overall CGPA.
Percentage calculator
Three ways to work with percentages — pick the one that matches your question.
How to use: Pick the mode that matches your question, then type your two numbers — the result updates as you type. No need to press a button.
Discount calculator
See exactly what you'll pay after a percentage off.
How to use: Enter the original price and the discount percentage on the tag or offer — you'll see the amount saved and the price you actually pay.
Tip splitter
Work out the tip and split the bill evenly across the table.
How to use: Enter the bill total, the tip percentage you want to leave, and how many people are splitting it — the per-person amount includes the tip.
Loan / EMI calculator
Estimate the monthly payment on a fixed-rate loan.
How to use: Enter the loan amount, the annual interest rate your lender quoted, and the repayment period in months to see your monthly EMI.
Uses the standard reducing-balance EMI formula. Actual bank offers may differ slightly.
Interest calculator
Compare simple interest against compound interest on the same numbers.
How to use: Enter the principal, annual rate, and time period, then pick how often interest compounds — compare the simple and compound totals side by side.
GST / sales tax calculator
Add tax onto a net price, or pull tax out of a price that already includes it.
How to use: Choose "Add tax" if your amount excludes GST, or "Remove tax" if it's already included — then enter the amount and the applicable rate.
BMI calculator
Body mass index from height and weight, with the standard weight category.
BMI is a general screening measure and doesn't account for muscle mass, age, or body composition — it isn't a diagnosis.
How to use: Enter your weight in kilograms and height in centimetres to get your BMI and which weight category it falls into.
Age calculator
Exact age in years, months, and days between two dates.
How to use: Pick a date of birth and, optionally, a different "as of" date — leave the second date as today to find your current age.
Average calculator
Mean, sum, and range of any list of numbers.
How to use: Paste or type any list of numbers separated by commas or spaces — the average, sum, and range update instantly.
GPA calculator
Add each course's grade point and credit hours to get a weighted GPA.
How to use: Name each course, choose its letter grade, and enter its credit hours — add or remove rows as needed to match your semester.
Built for accuracy
Every formula here — EMI, compound interest, BMI, GPA — follows the standard method used by banks, schools, and health guidelines.
Works on any device
No app, no install. Open it on your phone at the checkout counter or on a laptop while doing your taxes.
Nothing leaves your browser
Every calculation runs locally in JavaScript. Numbers you type are never sent anywhere or stored.
Common questions
Quick answers. Zero jargon.
Everything you need to know before you trust the number.
Is Onlinecalculatorworks actually free?
Yes. Every calculator on this site is free to use, with no sign-up, no account, and no usage limits.
Do you store the numbers I type in?
The calculations run locally in your browser. This site does not send calculator inputs to its own application server.
How accurate are the results?
Each tool uses the standard formula for that calculation — the same reducing-balance EMI formula banks use, the same BMI ranges used in health guidelines, and so on. That said, none of these tools replace personalized advice from a bank, doctor, or tax professional.
Can I use these calculators on my phone?
Yes — the site is fully responsive and works the same way on a phone, tablet, or desktop browser, with no app to install.
Will more calculators be added?
Yes, this list keeps growing. If there's a calculator you'd like to see, let us know through the contact page.