Estimates, not decisions
Every calculator shows an estimate from the inputs and the formula on that page. Rounding, fees, local rules, and facts you did not type can change the real figure.
Do not treat a result as a promise of a payment, a return, a tax bill, or a health outcome.
Money and tax
EMI and home-loan pages use a standard instalment formula. They are not a sanction letter. A lender can add fees or change a rate.
The GST page adds tax to a base amount. It does not file a return and it does not split CGST, SGST, and IGST. The salary page subtracts a flat percent you type. It does not apply income-tax slabs.
SIP and interest pages use the rate you type. That rate is not a forecast and not a guaranteed return.
Health
BMI, water intake, and pregnancy-week tools are rough teaching figures for adults or, in the pregnancy tool, a last-period day count. They are not for children, not a diagnosis, and not a substitute for a qualified clinician.
If you have symptoms, a fluid restriction, or uncertainty about a pregnancy date, use personal medical care rather than this site.