Free trading calculators with visible formulas
Estimate position size, pip value, reward-to-risk, and margin without hiding the assumptions. Each calculator explains its formula, shows a worked example, and identifies where broker rules, contract specifications, live currency conversion, costs, and execution can change the result.
Forex Position Size & Lot Size Calculator
Calculate an estimated forex position size from account balance, risk percentage, stop-loss distance, and pip value. See lots, units, and cash at risk.
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Forex Pip Value Calculator
Estimate pip value for a forex position using lot size, pip size, and an optional quote-to-account currency conversion multiplier.
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Trade Risk/Reward Ratio Calculator
Calculate reward-to-risk from entry, stop, and target prices, identify long or short direction, and estimate the account amount allocated to risk.
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Forex Margin & Leverage Calculator
Estimate notional position value and initial margin from forex lot size, price, leverage, and quote-to-account currency conversion.
Open calculatorWhat these calculators do
They perform deterministic arithmetic in your browser. No account connection is required, inputs are not sent to Orrnn, and the tools do not generate trade signals or recommendations. The purpose is to make basic planning relationships inspectable: how a wider stop reduces theoretical position size, how lot size changes pip value, how entry and exit distances form a ratio, and how leverage changes collateral requirements.
What they cannot decide
A calculation cannot determine whether a trade is suitable, profitable, legal in a jurisdiction, or likely to execute at a displayed price. It cannot model every commission, spread, gap, liquidity constraint, margin tier, correlation, tax, or provider rule. The CFTC warns that leveraged retail forex can amplify losses and that customers should investigate providers and disclosures carefully. Review the official CFTC forex customer advisory and obtain professional advice where appropriate.