Age, EMI, GST, BMI, SIP and percentage calculators
NinjaFunction's Age Calculator works out your exact age from your date of birth. It shows years, months and days, the total months, weeks and days you have lived, the weekday you were born and how many days are left until your next birthday. You can also pick any other date to find your age on that day. Nothing you enter leaves your browser.
NinjaFunction's Percentage Calculator answers the three most common percent questions: what is X% of Y, X is what percent of Y, and what is the percentage change from one number to another. Enter two numbers and read the answer with a short sentence that explains it. It runs in your browser with no sign-up.
NinjaFunction's EMI Calculator finds the monthly instalment for a reducing-balance loan. Enter the loan amount, the yearly interest rate and the tenure in years or months. It shows your EMI, the total interest and the total payment, and a year-by-year table of principal paid, interest paid and the balance left. Nothing is sent to a server.
NinjaFunction's GST Calculator adds GST to a price or takes it out of a price that already includes it. Pick a common rate such as 5%, 12%, 18% or 28%, or type your own, and see the base amount, the GST, the CGST and SGST split and the total. It runs in your browser and stores nothing.
NinjaFunction's BMI Calculator works out your Body Mass Index from your weight and height. Use kilograms and centimetres, or pounds, feet and inches. It shows your BMI, the WHO adult category and the healthy weight range for your height. BMI is a screening guide, not a medical diagnosis. Your numbers stay in your browser.
NinjaFunction's SIP Calculator estimates how an investment may grow. Choose a monthly SIP or a one-time amount with compound interest, enter the amount, the expected yearly return and the years, and see the future value, the amount invested and the estimated returns. Real returns vary and are not guaranteed. Nothing is stored or sent.
NinjaFunction's Date Difference Calculator shows the time between two dates in years, months and days, and also as total days, total weeks and weekdays (Monday to Friday). The dates can be in either order, and the end date starts as today. It runs in your browser.
NinjaFunction's Discount Calculator shows the price you pay after a percentage discount and how much you save. Add a second discount, such as a coupon, and it is applied to the reduced price, as shops do. You also see the total discount as a percentage. It runs in your browser.
Calculators turn the everyday maths of money, health and dates into a quick answer. There is nothing to install and nothing to sign up for, and your numbers stay in your browser.
The Age Calculator gives your exact age in years, months and days, and the Date Difference Calculator counts the time between any two dates. The EMI Calculator shows the monthly payment on a loan, and the SIP / Compound Interest Calculator estimates how an investment may grow. Use the GST Calculator to add or remove tax, the Discount Calculator to find a sale price, the Percentage Calculator for any percent question, and the BMI Calculator to check your body mass index.
They use standard formulas, so the results match what you would work out by hand. For loans and taxes, your bank or invoice may differ slightly because of rounding, fees or a different rate, so use the result as a close estimate.
No. Every calculation runs in your browser. Nothing you type is uploaded, saved or shared.
No. The SIP and compound interest results use one steady rate that you choose. Real returns change and are not guaranteed, so speak to a licensed adviser before you invest.