Kalcyra — free online calculators & converters

Work out your monthly payment, total interest, and full amortization schedule.

See how your savings or investments grow over time with compound interest and regular contributions.

Convert between world currencies using live, up-to-date exchange rates.

Find a percentage of a number, work out what percent one number is of another, or calculate percentage change.

Work out the tip, total bill, and per-person split for any group size.

Find out how much to save each month to hit a savings goal by a target date.

Calculate return on investment, net profit, and annualized return from an initial and final value.

Work out the sale price and total savings for any percentage-off discount.

Free online tools