Which tool should I use?
Each calculator answers one common money question. All of them are free, run in your browser and do not require an account.
Saving: compound interest calculator
Use it to see how a balance grows when interest is added to interest. Enter a starting amount, a monthly deposit, an interest rate and a number of years to see your projected balance and how much of it comes from interest.
Low-risk cash: Treasury bill calculator
Treasury bills are bought at a discount and repaid at face value. The calculator turns a face value, discount rate and term into the price you pay, the dollar return and the annualised investment yield, so you can compare T-bills with savings accounts.
Trading: crypto profit calculator
Enter your buy price, sell price, amount invested and fees to see your profit or loss and percentage return. It is a quick way to check a trade's break-even price before you place it.
Investing regularly: DCA calculator
Dollar-cost averaging means investing a fixed amount on a schedule regardless of price. The DCA calculator backtests that strategy on real historical prices so you can see what a weekly or monthly plan would have returned.
Converting money: currency and crypto converters
The converters use mid-market exchange rates and crypto prices refreshed every hour. They show the fair market rate before fees, which is the benchmark to compare banks, money transfer services and exchanges against.
A note on accuracy
Calculators project results from the numbers you enter. Real returns depend on future rates and prices, fees and taxes, so treat the results as estimates rather than guarantees.
Frequently asked questions
Are these calculators free?+
Yes. Every tool on this page is free to use, with no sign-up required.
How often is the market data updated?+
Currency exchange rates, crypto prices and stock prices are refreshed every hour. Each page shows the time of the last update.
Do the calculators include taxes?+
No. Results are before tax. Interest, T-bill returns and crypto gains may be taxable depending on where you live, so check the rules in your country or speak to a tax adviser.
Can I use the tools on my phone?+
Yes. All of the tools work in any modern mobile or desktop browser.
