For shares, ETFs and index products: size the trade from the risk you accept and where your stop sits.
Risk warning. Leveraged products such as forex and CFDs lose money quickly and most retail accounts lose. These calculators do arithmetic on the numbers you type. They are education, not advice, and not a recommendation to trade anything.
Units = (account × risk % − commissions) ÷ distance between entry and stop. The result is rounded down to a whole unit. Commission is counted on both sides.
Shares and indices can open beyond a stop after a close. The loss can be larger than planned, so size for a worse exit than the one you expect.
For crypto futures and perpetuals, use the crypto position size calculator.
No. The size comes from risk and stop distance. Leverage only changes the margin you must post.
The distance to the target divided by the distance to the stop. The calculator also shows the win rate needed to break even at that ratio.
Yes, if the price is in your account currency and one unit moves one point in value. Check your broker's contract size.