What are standard, mini and micro lots in forex?

A lot expresses trade volume using the contract size of a particular symbol. In the standard FX convention, one lot contains 100,000 base-currency units; a mini-lot is 0.10 lot and a micro-lot is 0.01. For the hypothetical linear EUR/USD examples here, one pip is 0.0001 USD per EUR, giving 10 USD, 1 USD and 0.10 USD per pip respectively, before separate charges. Check the actual contract and volume rules before copying those figures into an order.

What a lot actually is

The standard FX convention uses 100,000 units of the first currency in the pair: 100,000 EUR for EUR/USD, GBP for GBP/USD and USD for USD/JPY. A platform symbol may use another contract size, so the general calculation is lots × units per lot. The lot label describes volume; it does not establish the cash deposit or maximum loss.

For a leveraged FX or CFD position, the required margin can be smaller than the notional exposure. That does not reduce the price sensitivity of the units held. To interpret volume, first identify contract size and profit currency, then calculate pip value and check the applicable margin formula separately.

The hierarchy: standard, mini, micro and nano

With a 100,000-unit contract, a mini-lot is 10,000 units and a micro-lot is 1,000. The label nano sometimes denotes 100 units, or 0.001 lot, but it does not promise availability. Some provider platforms accept units rather than lots. Read the form unit, minimum volume and volume step for the actual symbol and account; these cannot be inferred from a region or marketing name.

With a 100,000-unit contract, 1.0, 0.1 and 0.01 lot represent 100,000, 10,000 and 1,000 units. Minimum volume and volume step are instrument-specific. Round a calculated volume ceiling down to the permitted step; two decimal places apply only when that step is 0.01.

How lot size translates into pip value

In the linear FX model, the value of a single pip scales with base-currency units when the pip convention and conversion stay fixed. For the assumed 100,000-EUR contract, 0.0001 pip and USD account, the table gives gross price sensitivity before separate charges:

The easiest thing is to memorise just one figure: on EUR/USD a standard lot is 10 dollars per pip. The rest you can work out in your head — you just shift the decimal point. A mini-lot is ten times less, that is 1 dollar. A micro-lot is ten times less again, that is 10 cents. The same logic runs the other way: two standard lots are 20 dollars per pip, and five are 50 dollars.

This connects position size with monetary sensitivity; the trader abbreviations glossary explains SL and TP. In our hypothetical EUR/USD model, actual entry and exit fills thirty pips apart against the position produce a 300 USD price loss on one standard lot or 3 USD on one micro-lot. A stop requested thirty pips away need not produce those exact fills. Commission and funding, if charged separately, also affect the final result.

Why leverage and margin change the picture

Consider a hypothetical standalone EUR/USD position with 100,000 EUR notional and a simple margin formula of notional divided by an assumed leverage parameter of 30:1. This gives 3,333.33 EUR, or 3,616.67 USD at an assumed EUR/USD rate of 1.0850. For background on the EU retail major-pair CFD limit, see 1:30 for a retail client; this calculation is an example, not confirmation of the terms available on an account. Real margin formulas can include product rules, tiers and currency conversion.

In the same simple model, a 1,000-EUR micro-lot requires 33.33 EUR, or 36.17 USD at 1.0850. Its pip sensitivity is one hundredth of the standard lot because the units are smaller. Required margin does not measure the maximum loss or make a volume suitable for a particular account; also check equity, other positions and the provider’s close-out rules.

The trap when a broker calls a micro-lot "one lot"

A platform lot can represent a different number of units on different symbols or account specifications. For example, two fictional EUR/USD symbols may define one lot as 100,000 EUR and 10,000 EUR. Neither the region nor a label such as mini, micro or cent identifies the multiplier reliably.

For those fictional symbols, one pip on a 1.00-lot position is 10 USD and 1 USD respectively at a 0.0001 pip. A cost comparison needs both the quoted spread and the underlying units. Open the symbol Specification and read Contract size; 100,000 is the standard FX convention used here, not a mandatory figure for every regulated provider or product.

The most common misconceptions about lots

Do not confuse deposited capital with notional exposure. In a hypothetical 500 USD account, a one-lot EUR/USD price loss of 300 USD would equal 60% of the starting balance, before separate charges. This arithmetic does not establish that the trade could be opened: margin and close-out rules may prevent or terminate it. Check those constraints before considering price-loss calculations.

The second misconception is the belief that pip value is fixed for every pair. It is not. It depends on lot size, on the quote currency (the one on the right of the pair), and on the currency your account is held in. For pairs with the dollar as the quote currency — EUR/USD, GBP/USD, AUD/USD — and a dollar account, one standard lot is a convenient, round 10 dollars per pip. Pairs with the Japanese yen follow a different convention: there a pip is 0.01 rather than 0.0001, so one standard lot of USD/JPY gives 100,000 × 0.01 = 1,000 yen per pip. What that is in dollars depends on the current rate — with USD/JPY at 150.00 it works out at about 6.67 dollars. The same applies to an account held in zloty: pip value has to be converted through the current rate of the account currency. A third, smaller point: "half a lot" is not a separate type — it is simply 0.5 of a standard lot, that is 50,000 units and 5 dollars per pip on EUR/USD.

Which lot for your capital — what to do tomorrow

Volume follows from a chosen loss budget, price distance, contract units, costs and permitted volume steps. A one-percent budget is an illustrative sizing convention, not a universal standard or assurance of suitability. The following exercise can be completed without placing a trade.

1. Calculate a hypothetical volume ceiling. Assume a 5,000 PLN account, a chosen 1% planned price-loss budget, USD/PLN of 4.00, a thirty-pip distance and the EUR/USD contract used here. The budget is 50 PLN = 12.50 USD, so volume is 12.50 / (30 × 10) = 0.04167 lot. With a 0.01 step, 0.04 lot gives 12 USD or 48 PLN; 0.05 would exceed the assumed budget. This excludes separate costs and worse execution.
2. Check the Contract Size at your broker before you open a real position. In MetaTrader, right-click EUR/USD in the Market Watch window, choose Specification and find the Contract Size field. If you see 100,000, the broker uses the standard definition of a lot. If the number is different, recalculate pip value proportionally before you trust any cost comparisons.
3. Record pip values with their assumptions. For this EUR/USD contract, one micro-lot gives 0.10 USD per pip, one mini-lot 1 USD and one standard lot 10 USD. Keep contract size, pip convention and account currency next to the numbers; revise them when the instrument or conversion changes.
4. Check the order constraints without sending it. Compare the calculated volume with minimum, maximum, step and any total volume limit. If the desired size is below the minimum, increasing it simply to obtain acceptance changes the budget; the exercise can remain untraded.

If you are wondering what amount is even worth starting with, reach for the separate piece on how much money you need to start trading forex, and for the basics of the unit of movement itself, the explanation of what exactly a pip is. The full mechanics of choosing position size are broken down in the section on the lot at ForexMechanics.