Learn — Lot-Sizing Series 02
In forex, one standard lot as 100,000 base-currency units is a widely used convention, which makes 0.1 lot 10,000 units and 0.01 lot 1,000 units. This is not a universal rule, though: the meaning of one lot changes with the broker, the account and the instrument. This guide untangles how lots relate to units, contract size, pips and points, shows the general 1-pip value formula with units kept visible, and then routes you to a free calculator so you can check your own account conditions.
Key takeaways
The answer
Here is the answer first. In forex, one standard lot as 100,000 base-currency units is a widely used convention, and on that basis 0.1 lot = 10,000 units (a mini lot) and 0.01 lot = 1,000 units (a micro lot). For example, 0.01 lot of USDJPY is 1,000 US dollars, and 0.1 lot of EURUSD is 10,000 euros of trade size. The way to get there is simple: units = contract size × lots.
That figure of 100,000, however, is not a fixed rule shared across the whole market. The contract size for one lot can differ by account type and instrument, and on CFDs in particular (gold, stock indices, crypto and so on) the forex idea of currency units does not carry over at all. So the final reference is always your trading account’s contract specification (contract size). In this article we first build the whole picture with the forex convention, then set out the exceptions and how to verify them.
This piece is the terms-and-conversion lesson of the lot-sizing cluster. The complete procedure for working position size back from a loss budget lives in the forex lot size formula guide, and the map of the whole cluster is the parent FX and CFD lot size calculation guide. Every number and figure shown here is fictional educational data, not a recommendation for any instrument or a suggestion of future profit or loss.
Terminology
Most of the confusion comes from using similar words as if they meant the same thing. Start by separating four of them.
contract size × lots. So 0.1 lot × 100,000 = 10,000 units.In other words, the same “0.1 lot” gives different units when the contract size differs. For a forex pair it is 10,000 units, but for an instrument whose contract size is 10,000 it would be 1,000 units. The word “lot” alone fixes neither the amount nor the risk, and that idea is the foundation of the whole article. The flow from a lot to an actual risk amount and required margin is covered in detail in the required margin and effective leverage guide.
Unit conversion
When the lot grows tenfold, the units grow tenfold too. The figure below shows the three steps — micro, mini and standard — as a staircase, assuming a forex currency pair with a contract size of 100,000 (you can scroll it horizontally).
So the apparent smallness of a lot and its actual trade size need to be kept separate. Even if 0.01 lot “feels small,” on an instrument with a large contract size both the units and the implied gain or loss can be far from negligible. That is exactly why the next step is to check, with units attached, “how much one pip is worth.”
Smallest move
Before computing 1-pip value, separate the units used to count price movement. Confuse them and you will be off by a digit.
1 pip = 10 points. On some CFDs a point is defined as a 1.0 price move.The distinction to hold on to is that a pip is a “foreign-exchange convention,” while a point and a tick are “broker and instrument specifications.” Even the idea that one pip on a JPY pair is 0.01 is a convention; if the broker quotes one extra digit (for example 0.001), the smallest step on screen is a point, not a pip. Always confirm how digits are counted against the price display and the tick size. The concrete workflow of measuring a stop distance in pips and turning it into a lot is covered in the forex lot size formula guide.
The formula
The value of one pip is found with the formula below. The key is not to drop the units along the way.
General formula
First, contract size × pip size × lots gives the 1-pip value in the profit currency. Only when the profit currency differs from the account currency do you multiply by the conversion rate to restate it in the account currency. If the profit currency equals the account currency, the conversion rate is 1. The worked substitutions below use fictional educational data.
Worked example: EURUSD / 0.1 lot / account = JPY
Worked example: USDJPY / 0.1 lot / account = JPY
On USDJPY the profit currency is JPY, the same as the account currency, so the conversion rate is 1. On EURUSD the profit currency is USD, so a USD-to-JPY conversion rate (for example 150.00) is needed. Always confirm the direction of the conversion rate — from which currency to which — in words as well.
This formula works both when you want the value from pips and, in reverse, when you are asking “which lot makes one pip worth a chosen amount.” It excludes spread, commission, swap and fill slippage, so the real result can be worse than this estimate.
Comparison
Feeding the same formula with a fictional rate set (USDJPY = 150.00, EURUSD = 1.1000, USD to JPY = 150.00), the table lists units and 1-pip value with the account currency set to JPY. All of it is fictional educational data, not live prices.
| Instrument | Lots | Units | Pip size | 1-pip value (profit currency) | 1-pip value (JPY) |
|---|---|---|---|---|---|
| USDJPY | 0.01 | 1,000 USD | 0.01 | 10 JPY | 10 JPY |
| USDJPY | 0.1 | 10,000 USD | 0.01 | 100 JPY | 100 JPY |
| USDJPY | 1.0 | 100,000 USD | 0.01 | 1,000 JPY | 1,000 JPY |
| EURUSD | 0.01 | 1,000 EUR | 0.0001 | 0.10 USD | 15 JPY |
| EURUSD | 0.1 | 10,000 EUR | 0.0001 | 1.00 USD | 150 JPY |
| EURUSD | 1.0 | 100,000 EUR | 0.0001 | 10.00 USD | 1,500 JPY |
On USDJPY the profit currency is JPY, so the profit-currency figure is already the JPY figure. On EURUSD the profit currency is USD, so the column with the USD-to-JPY conversion (for example 150.00) applied is the estimate that actually moves your account. The table also makes the proportional relationship visible: a tenfold increase in lots means a tenfold increase in value. Real figures shift with spread and fill price, so treat these as estimates.
The numbers in the table come from a fictional rate set. Enter your own account currency, symbol and contract size into the free lot-size calculator, and the same logic will give you units, 1-pip value and an estimate of required margin. A single-position check is available on the free tier — swap the fictional inputs for your own verified specifications.
Beyond forex
This is where people trip up most. Do not apply forex’s “one lot = 100,000 units” to XAUUSD (gold) or to index and crypto CFDs. These are not currencies; they trade in ounces, index points, coins and other units, and both the contract size and the definition of one pip or one point are entirely different. The table below is one fictional educational example of that difference (it varies widely by broker).
| Instrument type | One-lot example | Counted unit | Smallest-move name (example) | Note |
|---|---|---|---|---|
| FX currency pair | 100,000 units | base currency | pip (0.0001 / 0.01) | 100,000 units is a convention; verify on your account |
| XAUUSD (gold) | 100 oz (example) | troy ounce | price move / point | do not think in currency units; 10 oz variants also exist |
| Index CFD | index × multiplier (example) | index points | point (e.g. 1.0) | derive value from tick value × number of ticks |
| Crypto CFD | 1 coin (example) | coin count | price move / point | contract size and minimum quantity are distinctive |
As you can see, when the instrument type changes, the meaning of “one lot” itself changes. Concrete examples for gold appear in the XAUUSD gold lot size guide, and the contract size and point value for index and crypto CFDs are covered, with worked numbers, in the CFD position sizing guide. For now, remember just one thing: do not carry the forex sense of currency units into these markets.
Verify the spec
In the end, accurate calculation needs your own account’s instrument specification, not a convention. In MT4 or MT5 you can right-click the symbol and open its Specification. The card below lists the fields to check as a screen mock-up (fictional; not a reproduction of any real UI).
An illustrative display. The actual values and field names differ by broker and symbol. These numbers are educational and are not any specific broker’s specification.
With these six fields in hand, you can uniquely compute units, 1-pip (or 1-point) value, minimum lot and volume step. In particular, minimum volume and volume step are what you need to round a calculated lot down to a size you can actually place. If rounding down to the step falls below the minimum lot, that size may not be tradable. As a rule, round toward less risk, down to the nearest volume step.
Check it
The learning aid below takes contract size, lots, pip size and the conversion rate (profit currency to account currency), and shows units and 1-pip value with the formula attached. It is a simplified version meant to support the article, and it excludes spread, commission, swap, slippage and required margin. All calculation runs in your browser, and inputs are neither sent externally nor stored.
First, so it is readable even when JavaScript does not run, here is a static fictional educational worked example using the same defaults.
| Item | Value or formula |
|---|---|
| Contract size | 100,000 units/lot |
| Lots | 0.10 lot |
| Pip size | 0.0001 |
| Conversion rate (USD to JPY) | 150.00 |
| Units | 100,000 × 0.10 = 10,000 units |
| 1-pip value (profit currency) | 100,000 × 0.0001 × 0.10 = 1.00 USD |
| 1-pip value (account currency) | 1.00 × 150.00 = 150.00 JPY |
Conversion worksheet (educational — computes in your browser)
Once the worksheet has given you the feel, it is best to settle the values you will actually trade with in the free calculator. Checking units, 1-pip value, required margin and effective leverage for a single position is available on the free tier. When you reach the point of wanting to see aggregate risk across multiple positions, currency concentration and correlation, moving on to the aggregate multi-position risk guide and Pro features follows naturally.
Pitfalls
Mixing up lot, units and pip tends to collapse into a set of recurring patterns. If any sound familiar, open the contract specification and confirm on the spot.
Practical check
When lot notation confuses you, checking in the following order prevents order-of-magnitude errors. None of these are trading decisions; they are steps for grasping quantity.
contract size in the specification?units = contract size × lots?FAQ
Summary
In forex, on the convention of a 100,000-unit contract size, 0.01, 0.1 and 1.0 lots are 1,000, 10,000 and 100,000 units. But the deciding factor is the formula units = contract size × lots, not the figure 100,000 itself. Change the contract size and both the units and the 1-pip value change, and on gold, index and crypto CFDs the forex sense of currency units simply does not apply.
Compute 1-pip value with contract size × pip size × lots × conversion rate, keeping the units in place. Distinguish pip, point and tick, and do not swap the digit places of JPY and non-JPY pairs. Finally, always back it up with your account’s contract specification (contract size, tick, minimum volume, volume step, profit currency) — that is the heart of this article.
Read next
LC03: Forex Lot Size Formula — calculate position size from account balance, loss budget and stop-loss pips — now that the units make sense, move on to the formula that works a lot back from a loss budget.
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