Work out profit, margin and markup from cost and selling price, or find the price you need to charge for a target margin.
Margin is profit as a percentage of the selling price; markup is profit as a percentage of the cost price.
Convert between major world currencies with live exchange rates.
Calculate monthly loan instalments, total interest and total repayment.
Add a tip and split any bill evenly between friends.
Total your zakatable assets and see the 2.5% zakat due against your nisab.