How to Calculate Lot Size for EURUSD: Formula, Pip Value and Position Sizing
BY TIOmarkets
|March 25, 2026EURUSD is the most widely traded currency pair in the forex market, and calculating the correct lot size before entering a trade is one of the most practical skills a forex trader can develop. Getting lot size right means you are controlling how much of your account is at risk on any given trade, rather than letting position size be an afterthought.
This article explains how EURUSD lot sizes work, how to calculate pip value, how to apply a position sizing formula, and how to use TIOmarkets' pip value calculator to simplify the process.
EURUSD Contract Size and Lot Structure
In forex, a lot is a standardised unit of trade. For EURUSD, one standard lot represents EUR 100,000. This is the base currency amount you are effectively buying or selling each time you open a one-lot position.
Most retail traders do not trade full standard lots. The lot structure breaks down as follows. A standard lot is 1.0 lots, representing EUR 100,000. A mini lot is 0.1 lots, representing EUR 10,000. A micro lot is 0.01 lots, representing EUR 1,000. At TIOmarkets, the minimum trade size for EURUSD is 0.01 lots, which is EUR 1,000 of notional exposure.
Understanding the contract size is the starting point for all other position sizing calculations, because pip value and margin both derive directly from it.
What Is a Pip on EURUSD?
For EURUSD, a pip is the fourth decimal place in the price. If EURUSD moves from 1.08500 to 1.08510, that is a one-pip move. The fifth decimal place shown on most platforms is a fractional pip, sometimes called a pipette, representing one-tenth of a pip.
The monetary value of a one-pip move depends on your lot size. Because EURUSD is quoted in US dollars and the profit or loss is settled in the quote currency (USD), the pip value calculation is straightforward for traders holding USD-denominated accounts.
For a standard lot (EUR 100,000), a one-pip move on EURUSD is worth USD 10. This figure applies to USD account holders. For accounts held in other base currencies, the pip value in your account currency will vary depending on the prevailing exchange rate at the time of the trade.
For a mini lot (0.1 lots, EUR 10,000), a one-pip move is worth USD 1. For a micro lot (0.01 lots, EUR 1,000), a one-pip move is worth USD 0.10.
These figures make EURUSD one of the more straightforward pairs to work with for position sizing, because the pip value in USD is a clean round number at standard lot sizes.
How to Calculate Pip Value for EURUSD
The formula for pip value on a USD-quoted pair such as EURUSD is:
Pip value = (Pip size × Lot size in units) × Contract size
For EURUSD, the pip size is 0.0001 (one pip at the fourth decimal place), and the contract size is 100,000 units per standard lot.
For a standard lot: 0.0001 × 1.0 × 100,000 = USD 10 per pip (USD account)
For a mini lot: 0.0001 × 0.1 × 100,000 = USD 1 per pip (USD account)
For a micro lot: 0.0001 × 0.01 × 100,000 = USD 0.10 per pip (USD account)
This calculation is clean for USD accounts because EURUSD is quoted in USD, so no conversion is needed. For accounts denominated in another currency, the USD pip value should be divided by the relevant USD exchange rate to obtain the pip value in your account's base currency.
How to Calculate Margin for EURUSD
Margin is the amount of capital required to open and hold a position. For EURUSD on a standard account at TIOmarkets, the margin requirement is 1%, which corresponds to leverage of up to 1:100 at that margin level.
The formula for required margin is:
Required margin = (Lot size in units × Current price) × Margin percentage
For a standard lot at a EURUSD price of 1.0850 on a USD account:
100,000 × 1.0850 × 0.01 = USD 1,085
For a mini lot (0.1 lots):
10,000 × 1.0850 × 0.01 = USD 108.50
For a micro lot (0.01 lots):
1,000 × 1.0850 × 0.01 = USD 10.85
These figures change as the EURUSD price moves, because the margin is calculated on the notional value of the position in the quote currency. Leverage is subject to change depending on market conditions and applicable regulatory requirements.
On the Standard account at TIOmarkets, leverage up to unlimited is available on eligible symbols. The unlimited leverage feature uses dynamic margin scaling based on account equity, and only symbols with the "un" suffix in MT5 are eligible. News event and weekend restrictions apply. Margin requirements and leverage levels are subject to change depending on market conditions and applicable regulatory requirements.
Position Sizing Formula for EURUSD
Position sizing is the process of calculating how many lots to trade based on your available capital, your risk tolerance per trade, and the distance of your stop-loss.
The standard position sizing formula is:
Lot size = (Account balance × Risk per trade) ÷ (Stop-loss in pips × Pip value per lot)
Worked example (USD account):
Suppose you have a USD 5,000 account and you are willing to risk 1% of your balance on a single EURUSD trade. Your stop-loss is set at 30 pips. Pip value for EURUSD on a standard lot is USD 10.
Risk amount: USD 5,000 × 0.01 = USD 50
Lot size: USD 50 ÷ (30 × USD 10) = USD 50 ÷ USD 300 = 0.17 lots
Rounding to the nearest available lot size, you would trade 0.17 lots. This means a 30-pip adverse move would result in a loss of approximately USD 51, consistent with your 1% risk target.
This formula keeps your risk consistent across trades regardless of where you place your stop-loss. A wider stop requires a smaller lot size; a tighter stop allows a larger lot size for the same monetary risk. The key discipline is defining your risk amount and stop-loss distance before calculating the lot size, not working backwards from a desired lot size.
Note that this example assumes a USD account. For accounts held in other base currencies, pip value should be converted to your account currency at the prevailing rate before applying the formula.
Using TIOmarkets Calculators for EURUSD
TIOmarkets provides online calculators that can handle these calculations directly, which is useful for checking your working or for trading conditions where you want a quick result without manual arithmetic.
The Pip Value Calculator allows you to enter the instrument, lot size, and account currency to obtain the pip value in your base currency. This is particularly useful for non-USD accounts where the conversion step adds complexity.
The Margin Calculator allows you to enter the instrument, lot size, leverage, and account currency to obtain the required margin. This helps you understand how much of your account balance will be committed as margin before you open a position.
The Profit Calculator allows you to estimate the monetary outcome of a trade given an entry price, exit price, lot size, and account currency. This is useful for planning trades and checking that your expected risk-reward ratio is consistent with your position size.
Using these calculators in combination with the position sizing formula above gives you a complete picture of a trade's risk profile before you enter it.
How Spreads and Commissions Affect EURUSD Position Sizing
Every EURUSD trade incurs a cost at the point of entry, and this cost should be factored into your position sizing and risk calculations.
On the Standard account, EURUSD spreads start from 1.1 pips, though spreads are variable and will typically be higher than the minimum figure shown, particularly during periods of low liquidity or ahead of significant economic data releases. There is no commission on the Standard account.
On the Raw account, EURUSD spreads start from 0.0 pips, with a commission of USD 6 per round turn lot. The commission is charged in full when the position is opened and covers both the opening and closing of the trade. For a 0.17-lot position, the commission would be 0.17 × USD 6 = USD 1.02, charged at the point of opening. This commission should be included in your cost estimate when assessing whether the trade meets your risk-reward criteria.
On the VIP Black account, spreads start from 0.3 pips with no commission. As with all accounts, spreads are variable.
When running the position sizing formula, adding the estimated spread cost to your stop-loss distance in pips gives a more realistic picture of the total cost of the trade. For example, if your stop-loss is 30 pips and the spread at entry is 1.5 pips, your effective risk from entry to stop is 31.5 pips, which should be used in the formula rather than the raw stop-loss distance.
EURUSD Trading Hours
EURUSD is available to trade from Monday 00:00 to Friday 23:55 server time. The market is open continuously from Sunday evening (when the Sydney session begins) through to Friday close, with no intraday break. The pair is closed on Saturday and Sunday.
The most actively traded period for EURUSD is typically the overlap between the London and New York sessions. During this window, liquidity tends to be at its highest and spreads on major pairs are generally at their tightest, though this can change rapidly around economic data releases. Swaps for EURUSD are applied at 22:00 GMT daily, with a triple swap applied on Wednesdays.
Trading EURUSD at TIOmarkets
EURUSD is available on Standard, Raw, and VIP Black accounts on MT4 and MT5, with a minimum trade size of 0.01 lots and leverage up to unlimited on the Standard account. Hedging is permitted.
Traders interested in a swap-free account should contact TIOmarkets directly to discuss Islamic account eligibility and applicable instruments. Copy trading is also available for traders who prefer to follow strategy providers rather than manage their own positions.
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