Lot size explained: standard, mini, micro, and nano lots
By Ken Chigbo, Founder, KenMacro. Published 2026-05-12.
Quick answer
Lot size in forex defines the unit of position. A standard lot equals 100,000 units of the base currency. A mini lot equals 10,000 units (one-tenth standard). A micro lot equals 1,000 units (one-hundredth standard). A nano lot equals 100 units (one-thousandth standard, also called cent lots at some brokers). Pip value scales linearly with lot size.
Quick answer
Lot size in forex defines the unit of position. A standard lot equals 100,000 units of the base currency. A mini lot equals 10,000 units (one-tenth standard). A micro lot equals 1,000 units (one-hundredth standard). A nano lot equals 100 units (one-thousandth standard, also called cent lots at some brokers). Pip value scales linearly with lot size.
What is lot size?
Lot size is the standardised unit of position in forex trading. The four common lot sizes are standard (100,000 units of the base currency), mini (10,000), micro (1,000), and nano or cent lot (100, available at some brokers under cent-account programs). For a EUR/USD position, one standard lot equals 100,000 euros worth of exposure, one mini lot equals 10,000 euros, one micro lot equals 1,000 euros. Pip value is proportional: one pip on a standard lot of a USD-quoted pair equals roughly 10 US dollars, on a mini lot 1 dollar, on a micro lot 10 cents, on a nano lot 1 cent.
How traders use lot size
Traders choose lot size based on account equity and the risk-per-trade percentage. With a 5,000 US dollar account and a 1 per cent per-trade risk cap (50 US dollars), a 50-pip stop on EUR/USD permits a 1-mini-lot position (50 pips times 1 US dollar per pip equals the 50-dollar risk cap). The same account with a 30-pip stop permits roughly 1.6 mini lots; a 100-pip stop permits 0.5 mini lots. Position sizing is a mechanical calculation, not a discretionary choice. A trader who sizes positions discretionarily without computing the risk-percentage equivalent typically over-leverages and blows up. The desk recommends a position-size calculator (free at most reviewed broker sites) used before every trade.
ASIC regulated. Raw-spread ECN execution. Built for active intraday forex and index traders who care about cost per round-turn.
Worked example with lot size
Consider a trader with a 10,000 US dollar account, a 1 per cent risk cap (100 US dollars per trade), and a GBP/USD trade with a 50-pip stop. Pip value on one standard lot of a USD-quoted pair is roughly 10 US dollars, so a 50-pip stop on one standard lot equals 500 US dollars of risk, which exceeds the cap. Sizing down to one mini lot reduces risk to 50 US dollars (a 50-pip move at 1 US dollar per pip), which fits the cap with room. The trader places one mini lot. The calculation: risk cap (100) divided by stop in pips (50) divided by pip value per micro lot (0.10) equals 20 micro lots, equivalent to 2 mini lots; the trader takes 2 mini lots if comfortable, or 1 mini lot conservatively.
Open a Vantage raw-spread account
Related from the desk
Frequently asked
What is one lot in forex?
One standard lot in forex equals 100,000 units of the base currency in a currency pair. On EUR/USD, one standard lot represents 100,000 euros of exposure. Mini lots are 10,000 units, micro lots 1,000 units, nano or cent lots 100 units. Pip value scales linearly with lot size across these tiers.
How much is one pip worth on one standard lot?
One pip on one standard lot of a USD-quoted pair (EUR/USD, GBP/USD, AUD/USD) is worth approximately 10 US dollars. On JPY-quoted pairs (USD/JPY, EUR/JPY), one pip on one standard lot is worth approximately 1,000 yen, which translates to roughly 7 US dollars at current exchange rates. Pip value scales to 1 US dollar per pip on mini lots, 10 cents per pip on micro lots.
What lot size should a beginner use?
Beginners typically start on micro lots (0.01 standard lot equivalent) to permit meaningful trading on a small account while keeping individual position risk under 1 per cent of equity. Brokers offering cent or nano lots permit even smaller sizing. Lot size should be calculated from account equity and stop distance, not chosen by feel.
Related from the desk
Educational analysis only. Past performance does not guarantee future results. Manage risk against your own portfolio.
Continue reading