Calculators
Quick calculators for age, BMI, loan EMIs, GST, percentages and splitting a bill, with the formulas explained on each page.
6 free tools · no sign-up required
BMI Calculator
Body mass index from height and weight, with WHO adult categories
Age Calculator
Exact age in years, months and days on any date
EMI Calculator
Monthly loan EMI, total interest and amortization schedule
GST Calculator
Add or remove GST and see the CGST, SGST and IGST split
Percentage Calculator
Percent of a number, percentage change and increase or decrease
Tip Calculator
Work out the tip and split the bill between people
About these tools
Each calculator uses a standard, published formula and shows how the result is worked out, so you can check it yourself. They are built for everyday planning: comparing loan options, adding or removing GST on a price, working out a percentage change or splitting a restaurant bill.
Results are estimates. A lender's EMI may differ because of fees and rounding, GST depends on the exact rate that applies to your goods or service, and BMI is a screening measure rather than a medical diagnosis. The tool pages point out these limits.
Typical uses
Examples of everyday tasks these tools are built for.
Personal finance
Comparing the EMI and total interest of a loan at different tenures.
Small businesses in India
Adding GST to a price or finding the GST included in an invoice amount.
Everyday maths
Working out a discount, a percentage increase, someone's exact age or each person's share of a bill.
Frequently asked questions
Can I rely on these results for official purposes?
Use them as estimates. For loans, taxes or health decisions, confirm with your lender, the official tax portal or a qualified professional.
Do the calculators store what I enter?
No. All calculations run in your browser and nothing you type is sent to a server.