Proof / Free tools / Position size calculator
Free tool · every marketPosition Size Calculator
Your exact size from your risk and your stop. Lots for forex and gold, contracts for futures and options, shares for stocks and coins for crypto.
How position sizing works
Every market uses the same formula: decide how much money you’re willing to lose if the stop is hit, then divide it by how much one unit loses over that stop distance.
Size = money at risk ÷ (stop distance × value per point for one unit)
Forex and gold
Forex is sized in lots. One standard lot is 100,000 units of the base currency, so a 0.0001 move (one pip) on EURUSD is $10 per lot. Gold (XAUUSD) is usually 100 ounces per lot, so a $1.00 move is $100 per lot.
Futures
Futures are sized in whole contracts. Each contract has a fixed dollar value per point: ES $50, MES $5, NQ $20, MNQ $2, YM $5, CL $1,000, MCL $100, GC $100, MGC $10. If even one contract risks more than you planned, the stop is too wide for your account. Use the micro, or skip the trade.
Indices and CFDs
Index CFDs like US30, NAS100 and GER40 are often one unit of currency per point per lot, but brokers differ. Check your broker’s contract size.
Stocks, options and crypto
Stocks are sized in shares and crypto in coins, so a $1 move is $1 per share or coin. US equity options usually control 100 shares, so a $0.10 move in the premium is $10 per contract.
Proof sizes every trade this way automatically, from your account, your firm’s limits and how much room you have left today. See Proof.
Frequently asked questions
How do you calculate position size?
Position size = money at risk ÷ (stop distance × value of one price point for one unit). The money at risk is your account balance × your risk percent. The calculator does this for lots, contracts, shares or coins depending on the market.
How much is one pip worth on a standard lot?
On pairs quoted in US dollars, like EURUSD, one pip (0.0001) on one standard lot of 100,000 units is worth $10. On other pairs the value depends on the exchange rate, which the calculator converts for you.
How many futures contracts should I trade?
Divide your dollar risk by the stop distance in points times the contract’s dollar value per point. MNQ is $2 per point, NQ $20, MES $5, ES $50, MCL $100 and CL $1,000. If one contract is already more than your risk, the trade is too big for your account.
How do I size an options trade?
Most US equity options control 100 shares, so each $1.00 move in the premium is $100 per contract. Risk per contract = (entry premium − stop premium) × 100.
Does it work for crypto and stocks?
Yes. Stocks are sized in shares and crypto in coins, from your entry and stop.