Home / Free trading calculators
Free trading calculators
Free calculators for traders and investors, with no sign-up. They do the arithmetic on your own figures and give no advice. What you type never leaves your browser.
Trading carries risk. The value of investments can go down as well as up, and you can lose money. Past or tested results are not a guide to future results. We sell software and testing only: no advice, no signals, no promise of profit. We are not authorised by the Financial Conduct Authority. Read the full notice.
Position size calculator
How big to make a trade so a stop-out loses only what you set. Forex, shares, spread bets and CFDs.
Last checked 31 October 2026
OpenForex pip value calculator
What one pip is worth on your position, in your account currency. Any pair, gold, silver or a CFD.
Last checked 31 October 2026
OpenRisk reward calculator
Reward to risk with partial exits, the break-even win rate after costs, and the losing runs to expect.
Last checked 31 October 2026
OpenShare gain or loss calculator
The gain or loss on a share trade after commission, UK stamp duty and currency charges, with the break-even price.
Last checked 31 October 2026
OpenAverage entry price calculator
Your average price across several purchases, and how many more shares would bring it to a figure you enter.
Last checked 31 October 2026
OpenCompound interest calculator
How a sum and regular payments grow at your own rate, with charges, inflation, withdrawals and a goal.
Last checked 31 October 2026
OpenCurrency converter
About 30 currencies at the European Central Bank’s dated reference rates. Check the rate you are offered.
Last checked 31 October 2026
Open
If there is a calculation you would find useful, tell us. Your own rules tested or built into software: strategy testing and EA and automation.
Contact us
Use the form or email us directly.
Tell us what you need and we will reply with the next step.