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Free Calculators
Quick, accurate calculators for everyday numbers — age, health, loans, tax, discounts, interest, and Zakat. No sign-up, nothing saved, completely free. Click any calculator below to open it.
Age Calculator
Find exact age in years, months, and days from a date of birth.
BMI Calculator
Calculate Body Mass Index from weight and height, with category.
EMI / Loan Calculator
Work out monthly loan payments, total interest, and total cost.
Percentage Calculator
Three modes: percentage of a number, what % one is of another, and % change.
GST / Tax Calculator
Add or remove tax from any amount, in either direction.
Discount Calculator
See the exact amount saved and final price on any sale.
Simple Interest Calculator
Calculate flat-rate interest and total from principal, rate, and time.
Compound Interest Calculator
Project growth with adjustable compounding frequency.
Zakat Calculator
Calculate Zakat due (2.5%) from cash, gold, business assets, and debts.