Free Everyday Calculators
No sign-up, no downloads — just fast, accurate answers for the sums you look up most. Pick a tool below.
Zakat Calculator
Work out your annual Zakat on cash, gold, silver and investments against the current Nisab.
Loan / EMI Calculator
Find your monthly instalment, total payment and total interest on any fixed-rate loan.
Percentage & GPA Calculator
Convert marks to percentage, or work out a percentage increase or decrease.
Age Calculator
Get an exact age in years, months and days between any two dates.
BMI Calculator
Check your Body Mass Index from your height and weight, with the standard category ranges.
Discount Calculator
Find the sale price and how much you save on any percentage-off discount.
Simple Interest Calculator
Calculate simple interest and total payable amount on principal, rate and time.
Why The Ledger?
Every tool here runs entirely in your browser — nothing you type is sent anywhere or stored. Each calculator is built to be quick to load and simple to use on a phone, since that's how most people actually look these things up.