Famous Forex Calculator Lot Size References. A standard lot size is equal to 100,000 units of a currency. You only need to enter inputs in the yellow boxes.

For example, if the eurusd rate is 1.1845, you will need 118,450 base currency units to open the position of 1 lot. Lastly, enter the number of pips you are willing to hold the trade. When choosing the lot size for your trade, you may want to consider a few factors: