Forex Profit Calculator by Units or Lots

Calculate the price move in the quote currency first

A Forex pair states how many units of the quote currency equal one unit of the base currency. For EUR/USD, EUR is the base currency and USD is the quote currency. If the price moves from 1.1000 to 1.1050, each euro has gained 0.0050 dollars relative to the entered prices. A long position with 100,000 base units therefore has a gross price-move result of 0.0050 × 100,000 = 500 USD. For a short position, reverse the price difference: open minus close.

The general formulas are:

• Long gross quote P&L = (close price − open price) × base units.
• Short gross quote P&L = (open price − close price) × base units.
• Lots mode: base units = lots × explicitly entered base units per lot.
• Net account P&L = converted gross account P&L − entered fees − entered financing cost.

MetaQuotes documents base currency, profit currency, contract size, digits and other properties as symbol-specific fields. That is why this tool asks for units or an explicit units-per-lot amount. It does not silently assume that every symbol called one lot represents 100,000 base units.

Keep base, quote and account currencies separate

The gross result initially has the quote currency as its unit. If the account also uses the quote currency, no cross-currency conversion is needed. If the currencies differ, an unlabeled conversion number is unsafe because multiplying and dividing answer opposite rate orientations. The calculator requires one of two dimensional equations:

Rate orientation	Operation	Example
1 quote currency = rate account currency	Multiply gross quote P&L by the rate	1 GBP = 1.25 USD
1 account currency = rate quote currency	Divide gross quote P&L by the rate	1 USD = 150 JPY

The rate is supplied by you. It is not fetched, current, executable or broker-derived. Preserve its source and timestamp when reconciling an account. The settlement-currency conversion reference explains why adding P&L in unlike currencies without a common valuation basis creates an incoherent total.

Worked long, short, lot and JPY examples

EUR/USD long in a USD account

For 100,000 EUR opened at 1.1000 and closed at 1.1050, the signed change is 0.0050 USD per EUR. Gross P&L is 0.0050 × 100,000 = 500 USD. With 7 USD of fees and a 3 USD financing cost, the net educational estimate is 490 USD.

EUR/USD short

For a short opened at 1.1050 and closed at 1.1000, open minus close is 0.0050. With 100,000 base units, gross P&L is also 500 USD. If the close were 1.1100 instead, the signed difference would be negative and the result would show a loss rather than changing the direction label.

Lots with an explicit contract size

Suppose 0.10 lot represents 100,000 base units per lot. The normalized quantity is 0.10 × 100,000 = 10,000 units. If EUR/USD moves from 1.2000 to 1.2025 for a long, the change is 0.0025 USD per EUR and gross P&L is 25 USD. The 100,000 input is an example to confirm, not a universal default.

USD/JPY converted to a USD account

A long of 100,000 USD moving from 150.00 to 150.50 produces 0.50 × 100,000 = 50,000 JPY gross. If the supplied inverse equation is 1 USD = 150 JPY, divide 50,000 JPY by 150 JPY per USD. At two display decimals the result is 333.33 USD. A JPY-denominated account would keep the 50,000 JPY result and commonly display zero currency decimals, subject to the account's own precision.

EUR/GBP converted with a direct rate

A long of 100,000 EUR moving from 0.8500 to 0.8520 produces 200 GBP. If the supplied equation is 1 GBP = 1.25 USD, multiply 200 by 1.25 to obtain 250.00 USD.

Costs are manual adjustments with explicit signs

The calculator does not infer spread, commission, swap, financing, taxes, rebates or currency-conversion markup. Enter commissions and fees as a non-negative total in the account currency. Enter financing as a signed cost: a positive value reduces P&L and a negative user-entered value represents a credit. This convention prevents a credit from being subtracted twice.

Spread may already be represented by the entered open and close prices. Adding it again as a separate cost can double count it. Similarly, an account statement may report net P&L after commission. Decide whether the entered price result is gross or net and document the convention before comparing it with another record. The pip-value calculator addresses the value of a chosen price increment; this page instead calculates the full entered price move.

Exact decimal arithmetic and display rounding

Financial examples such as 1.005 can sit on a rounding boundary that binary floating-point approximates imperfectly. This tool parses plain decimal strings into exact integer fractions, keeps that precision through quantity, price and conversion calculations, and rounds only the displayed account-currency amounts. It uses round-half-away-from-zero so +1.005 becomes +1.01 and −1.005 becomes −1.01 at two decimals. Rounded negative zero is displayed as zero.

The maintained ISO 4217 table supplies a starting display precision: for example, two minor-unit digits for USD and zero for JPY in the checked list. You may choose zero through eight decimals for comparison with a broker record. That setting changes display rounding; it does not change the full internal fraction.

Validation and scope boundaries

Plain decimal input excludes exponent notation, thousands separators, NaN and Infinity. Quantity, contract size, prices and a required conversion rate must be greater than zero. Base and quote codes must differ. Inputs are capped at 18 significant digits, prices and rates at ten fractional digits, quantities at eight fractional digits and computed absolute magnitudes below 10¹⁸. These are calculator safeguards, not broker trading limits.

The formula covers linear Forex-style currency pairs quoted as quote-currency units per base unit. It excludes futures, options, spread bets, inverse or quanto products, synthetic symbols and any broker instrument that uses a different profit formula. It does not calculate margin, liquidation, tax, affordability or an appropriate position size. MetaQuotes notes that a platform's own profit estimate depends on the symbol and account environment; compare this transparent worksheet with the actual broker specification and statement rather than treating it as an exact account forecast.

For sizing before a hypothetical trade, use the Forex position-size calculator. For reconciliation after activity, preserve the exact fills, symbol contract fields, conversion basis, commissions and financing with the trading journal workflow.