What is a pip in forex?

A pip (percentage in point) is the smallest standard price move in a currency pair. For most pairs it is 0.0001 (the 4th decimal place). For JPY pairs it is 0.01 (the 2nd decimal place).

What is a standard lot?

A standard lot equals 100,000 units of the base currency. A mini lot is 10,000 units and a micro lot is 1,000 units.

Why does the quote currency matter?

Pip value is denominated in the quote currency. If your account is in USD and the quote currency is not USD, you need to convert pip value using the current exchange rate.

What risk percentage should I use?

Most professional traders risk between 0.5% and 2% per trade. Risking more than 5% per trade significantly increases the chance of account ruin over a long series of trades.

Does this tool work for JPY pairs?

Yes. The calculator automatically adjusts the pip value for JPY pairs (where 1 pip = 0.01) when you select a JPY pair from the list.

How do you calculate forex position size?

Position size = (account balance × risk %) ÷ (stop-loss in pips × pip value per lot). For example, risking 1% of a $10,000 account ($100) with a 20-pip stop and a $10 pip value per standard lot gives 0.5 lots.

Forex Position Size Calculator

Name: Forex Position Size Calculator
Availability: InStock
Author: Nham Vu

Calculate the correct forex lot size based on account balance, risk percentage, stop-loss pips, and currency pair pip value.

Trade Parameters

Account Balance

Risk Percentage (%)

Stop-Loss Distance (Pips)

Currency Pair

Quote→Account Rate (e.g. USD/USD = 1)

Fill in your trade parameters and click Calculate

Summary

Calculate the correct forex lot size based on account balance, risk percentage, stop-loss pips, and currency pair pip value.

How it works

Enter your account balance and select the account currency.
Set the percentage of your account you are willing to risk on this trade (e.g. 1%).
Enter the stop-loss distance in pips for the trade setup.
Select the currency pair and enter the current exchange rate if the quote currency differs from the account currency.
The calculator outputs the position size in standard lots, mini lots, micro lots, and units, plus the exact dollar risk.

Use cases

Determine exact lot size before entering a forex trade to enforce strict risk management.
Compare position sizes across different currency pairs under the same risk budget.
Back-test trade setups by replaying historical pip distances and account sizes.
Teach new traders the relationship between lot size, pip value, and account risk.

Frequently Asked Questions

Last updated: 2026-06-25 · Reviewed by Nham Vu