Work out the return on investment and the yearly (annualised) return of any investment or campaign.
ROI = (final value − amount invested) ÷ amount invested × 100. Annualised ROI = (final ÷ invested)^(1 ÷ years) − 1.
Work out profit, margin and markup from cost and selling 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.