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Forex Lot Size Calculator

Everything you buy or sell has a unit of measurement, like when you buy 1 kg of butter or a dozen eggs at the neighborhood grocery store. Even the world’s biggest and most active market is the same. Now that you’ve found the right trading tool, you can learn more about FX trading.


The forex lot size is a unit of measurement that tells you how big your order will be when you place it on the forex market. Your forex deals will always be made up of lots, and it’s important to understand lot size if you want to trade currency pairs successfully on the global forex market.

How do you calculate lot size in forex?

Calculating the lot size in forex involves considering several factors, including risk tolerance, account balance, and the currency pair being traded. The most common method for calculating lot size is using a formula based on risk percentage and pip value. The formula is as follows:

Lot Size = (Account Balance × Risk Percentage) / (Pip Value × Stop Loss in Pips)

What is a Lot?

To trade forex well, you need to know about some important units of measurement. First of all, a lot is a unit of measurement used to show how many cash units were bought or sold in a deal. When you put in an order to trade a stock, the size of that order is given in lots.

How many units are in a Forex lot size chart?

So, let’s talk about what a trading lot size is. The usual size of a coin lot is 100,000 pieces, but there are other sizes. Mini, micro, and nano lot amounts may also be available. There are 10,000 units in a mini lot, 1,000 in a micro lot, and 100 in a nano lot. All of these will be on a lot size chart that your trader gives you.

Lot Sizes and their Benefits

Why would you pick one lot instead of another?

  • Nano lot: This lot size is rarely used in foreign exchange trade but is the most customizable. Nano lots can help you test the waters of FX dealing if you are just starting and want to start small.
  • Micro lot: Most of the time, a micro lot is the smallest lot size that can be traded since nano lots are so rare. At 1000 units, you can trade on a smaller account, which is why new traders who want to limit their losses often use micro flats.
  • Mini lot: As a beginner, it would still be best to trade in mini lots to get the most out of selling. Many experienced forex traders use small lots to handle their situations better.
  • Standard lot: Most traders with accounts for private investors will never use this lot size. It seems tempting to trade this size, but you need money carefully. Standard lots belong to traders who know much about handling risks.


It seems tempting to trade this size, but you need money carefully. Standard lots belong to traders who know much about handling risks.

Calculating pips and lots: Taking the pip value into account

But because changes in the value of a currency can be so small, there is another way to measure this amount. This is called a pip. A pip is a very small part of how much money is worth. A pip takes the last place after the decimal point when a number is given. For example, if you trade EUR/USD and the price goes from 3.2040 to 3.2041, that’s a change of 0.1 EUR or one pip.


This is how you can figure out your profit. If you traded GBP/USD at 10,000 units, you would need to figure out how much money you made by figuring out how many pips moved and how many units you traded. If the price of GBP/USD was 1.0300 and it changed one pip, we would figure out the following:


[(000.1) / (1.0300)] x 1 = 0.00009708 GBP per unit


This means a one-pip change in a 10,000-unit trade is worth about 0.97 GBP. We found out by multiplying the size of our lot by the price per unit: 10,000 x 0.00009708 = 0.97. Now you can see why lot size and pip value are important in forex.

Choose a lot size: Micro lots and tiny lots

From a tiny lot to a small lot, lot size does matter. It is a key part of your plan to handle risks. You must know how many lots you’ll sell to determine how much you’re ready to risk. Which deal size to trade depends on how much money you have in your account, how much risk you are willing to take, how much leverage you can use, and how much money you want to make. Most experienced traders only risk 1% of their investment capital, which is something to consider when picking a lot size.

What about using Leverage?

You should now know that you don’t need nearly as much money to start trading forex as you do for other instruments. This is because there is a lot of risk in forex trade. Leverage is when you borrow money from a bank to boost your trade situation beyond what you can do with your cash. So, you must know as much as possible about trading forex.


As you now know, this can make your gains go up by a lot, but it can also make your losses go up by a lot. Using leverage lets you trade greater quantities than your account can afford, and the best trading forex apps will offer leverage. For example, you might purchase 100,000 lots of USD/JPY for only $1,000 if you used 100:1 leverage. When planning to manage risks in forex, leverage may be something to consider.


Returning to the last line, a trader needs to learn about the FX market once the dangers are known to determine how these risks will affect their trades. Then, if traders want to use leverage, they need to understand it well and develop a good trading plan.


Setting a risk-to-reward ratio will help you limit the amount of money you can afford to lose, and enforcing stops and limits will ensure you don’t go over them. Buyers must know what a lot size is to successfully purchase and sell currency pair contracts on the FX market. The size of a lot is the unit of measurement used to figure out how many units of cash are bought or sold in a deal.


When exiting a trade, the lot size and price change, recorded in pips, can be used to determine how much money was made or lost. Learning about forex lot sizes is an important part of making a trading strategy and a plan for managing risks that will help you do well in the forex market.


A Forex lot size calculator is a tool used by traders to determine the appropriate lot size for a trade based on their risk tolerance, account balance, and other factors. It helps traders calculate the number of units or contracts to trade, considering the desired risk amount and other parameters.

A Forex lot size calculator typically requires input values such as account balance, risk percentage, currency pair, account currency, stop loss in pips, and other relevant parameters. The calculator uses these inputs, along with the pip value for the currency pair, to calculate the appropriate lot size for the trade.

Using a Forex lot size calculator offers several advantages. It helps traders accurately determine the lot size for each trade, ensuring that risk is managed effectively. By precisely calculating lot sizes based on risk parameters, traders can maintain consistency in their position sizing and risk management strategies.

Yes, a Forex lot size calculator can be used for various currency pairs and account currencies. It allows traders to input the specific details of the currency pair they are trading, including the pip value, which may vary depending on the pair. Traders can also select their account currency to ensure accurate lot size calculations.

Yes, there are different types of Forex lot size calculators available. Some calculators are standalone tools that can be downloaded or accessed online. Many trading platforms also offer built-in lot size calculators or position sizing tools that automatically calculate the appropriate lot size based on the specified parameters.

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Written By: Allen Matshalaga


Allen is a professional forex trader, blogger, and online enthusiast who spends most of his time testing and reviewing legit ways of making money online and is determined to help others succeed.