Category
Calculator
Ten calculators for money and measurement, each showing the arithmetic rather than just the answer. Work out a loan instalment and what it costs in total interest, an age to the day, a percentage in either direction, GST inclusive or exclusive, or a discount and what you actually saved.
All Calculator tools10 tools
Loans, interest, and what the number really costs
Loan / EMI Calculator uses the standard reducing-balance formula that banks use, and shows the split between principal and interest across the term, which is the figure that changes decisions. A small rate difference looks trivial per month and enormous over twenty years. Compound Interest does the same in the other direction, compounding at the frequency you choose rather than assuming annually, because monthly and annual compounding diverge sharply over long periods.
Everyday arithmetic that is easy to get backwards
Percentage Calculator handles all three questions people actually ask: what is X percent of Y, X is what percent of Y, and the percentage increase or decrease between two numbers. Discount Calculator works forwards and in reverse, so you can find the original price from a sale price. GST Calculator separates inclusive from exclusive, which is where most manual errors happen: adding 18 percent and then removing 18 percent does not return you to where you started.
Health and measurement
BMI Calculator accepts metric or imperial and converts internally. Unit Converter covers length, weight, temperature, and volume. Age Calculator counts real calendar months and leap days rather than dividing by 365, which is why it disagrees with quicker tools by a day or two.
Frequently asked questions
Are these calculators accurate enough to rely on?
The arithmetic is exact and uses the standard formulas, so an EMI figure matches what a bank's own calculator produces for the same inputs. What a lender finally offers can still differ because of processing fees, insurance, and rounding conventions that vary by institution.
Is anything I type saved?
No. Every calculation happens in your browser as you type. Salary figures, loan amounts, and health measurements are never sent to a server, stored, or logged.
Which currencies are supported?
The maths is currency-agnostic, so the numbers are correct whatever you are working in. Formatting follows your browser's locale, and you can read any result as rupees, dollars, pounds, or euros.