Calculate your exact lot size before every trade
The most accurate Forex Lot Size Calculator for MT4 and MT5. Instantly determine your position size for XAUUSD (Gold), Bitcoin, and 50+ Forex pairs. Never risk too much on a single trade again.
Risk management
The Ultimate MT4 & MT5 Lot Size Calculator Guide
Risk management is the single most important pillar of successful trading. Without a reliable Forex lot size calculator for MT4 and MT5, you are merely gambling with your capital. Whether you are trading major currency pairs like EURUSD, highly volatile metals like XAUUSD (Gold), or crypto assets like Bitcoin (BTC), calculating your exact position size before executing a trade is mandatory.
Why Position Sizing Matters
If you guess your lot size, a single losing trade can wipe out weeks of profits. Our position size calculator MT4 ensures you never risk more than 1–2% of your account per trade.
Institutional Accuracy
The MT5 lot size calculator free engine dynamically accounts for pip values and contract sizes to deliver pinpoint accuracy across all asset classes.
Gold & Crypto Support
Built-in support for XAUUSD (Gold), XAG/USD (Silver), BTC/USD, ETH/USD, and US30, NAS100 indices with correct contract sizes.
Mobile Ready
Calculate your lot size right from your phone before pulling the trigger on any trade, no app download required. Works on any modern browser.
Advanced tools
Built for prop firm traders and serious retail traders
The advanced calculator goes beyond basic lot sizing. These three features are built for traders who manage funded accounts and need precision at every step.
Stay within daily drawdown limits
Set your FTMO, The Funded Trader, or MyForexFunds drawdown rules. The calculator shows exactly how many losing trades you can take before hitting your daily limit — with a live safety gauge that turns red as you approach the breach.
- Daily drawdown limit tracker
- Trades-before-breach counter
- Visual danger zone warning
See the real cost to open every trade
Enter your broker's spread in pips and instantly see the exact dollar cost to open the position. Pairs it with a breakeven price — the exact price where moving your SL covers the spread so you exit at zero cost.
- Dollar spread cost per trade
- Breakeven price after spread
- Works across all 50+ pairs
Plan your partial exit before entering
When you set a take profit, the calculator automatically shows what happens if you close 50% there — how much profit you lock in, your remaining lot size, and whether moving SL to entry gives you a break-even trade on the rest.
- Profit locked at 50% close
- Remaining position risk
- Break-even trade analysis
Getting started
How to use the MT4 Lot Size Calculator
Using our tool is incredibly simple and takes less than 5 seconds before every trade.
Select Your Currency
Choose the base currency of your MT4 or MT5 trading account (e.g., USD, EUR, GBP).
Account Balance
Enter your total available equity. The calculator uses this to compute your maximum risk amount.
Risk Percentage
Professional traders never risk more than 1% to 2% of their account on a single setup.
Stop Loss Price
Enter your stop loss price level. The tool calculates the pip distance automatically from your entry.
Select Trading Pair
Choose the asset you are trading. The calculator will output the exact Standard, Mini, or Micro lots to enter in MetaTrader.
Asset coverage
50+ instruments across all major asset classes
Forex Majors & Minors
EURUSD, GBPUSD, USDJPY, AUDUSD, NZDUSD, USDCAD and 20+ cross pairs. Full coverage for MT4 and MT5 Forex lot size calculations.
Gold Lot Size Calculator
Calculating position size on Gold is notoriously difficult because pip values and contract sizes differ drastically from standard Forex pairs. Our engine handles it automatically.
Bitcoin & Crypto
If you trade Bitcoin on MT4 or MT5, position sizing can be incredibly confusing due to massive contract sizes. Use our tool as a Bitcoin Lot Size Calculator to avoid blowing your account during volatile crypto spikes.
US30, NAS100, S&P 500
Index CFDs have unique contract structures. The calculator accounts for the correct lot sizes for Dow Jones (US30), Nasdaq 100, S&P 500, DAX and FTSE.
MT4 vs MT5 Lot Size Calculations
Whether you are searching for a forex lot size calculator mt4 or a lot size calculator mt5, the underlying formula remains the same:
However, some brokers use different contract sizes on MT5 compared to MT4. If you notice a discrepancy, adjust the Contract Size field in the advanced calculator to match your broker's specifications perfectly.
PLATFORM COMPATIBILITY
- MetaTrader 4 (MT4)
- MetaTrader 5 (MT5)
- cTrader & TradingView
LOT FORMATS OUTPUT
- Standard Lots (100,000 units)
- Mini Lots (10,000 units)
- Micro Lots (1,000 units)
Tired of manually calculating risks?
Automate your entire trading strategy with our institutional-grade algorithms. Get perfect risk management built-in on every single trade.
Knowledge base
Commonly asked questions
The most accurate Free Forex Lot Size Calculator for MT4 and MT5. Instantly determine your position size for Gold (XAUUSD), Bitcoin, and 50+ pairs.
How do I use a Forex Lot Size Calculator?
To use the Forex position size calculator, enter your account base currency, your current balance, and the percentage of risk you want to take (e.g., 1%). Input your entry price and stop loss price. The tool will instantly calculate the exact Lot Size (Standard, Mini, or Micro) required to keep your risk within your limit.
What is the best Lot Size Calculator for MT4 and MT5?
While many traders use external web tools, the best approach is an on-chart MT5 Lot Size Calculator EA. Our tool provides the mathematical output for web users, but we also offer a native MetaTrader 5 utility that allows you to drag-and-drop your stop loss directly on the chart for instant execution.
How is XAUUSD (Gold) lot size calculated?
Gold (XAUUSD) has different contract sizes compared to standard Forex pairs. Our engine functions as a dedicated Gold Lot Size Calculator, automatically accounting for the $10 per pip move (on a standard lot) to ensure your risk remains accurate whether you are trading 0.01 or 10.0 lots.
Can I calculate Position Size for Bitcoin and Crypto?
Yes. This tool serves as a Bitcoin (BTC/USD) Lot Size Calculator. Because Crypto markets are highly volatile, using a Position Sizer is critical. The calculator adjusts for the high decimal precision and contract specifications of crypto-assets offered by major Forex brokers.
Why is my Lot Size different on MT4 vs MT5?
The math remains the same, but the contract size determined by your broker might vary. Our calculator allows you to input 'Contract Size' (usually 100,000 for Forex) to ensure your MT4 lot size calculation matches your broker's specific requirements perfectly.
Can I use this as a Prop Firm lot size calculator for FTMO or The Funded Trader?
Yes. Enable Prop Firm Mode in the advanced calculator and enter your challenge's daily drawdown limit (typically 5% for FTMO) and maximum drawdown (typically 10%). The calculator will show you exactly how many losing trades you can take before breaching your daily limit, and a safety gauge turns red when you are approaching the boundary. This works for FTMO, The Funded Trader, MyForexFunds, and any other firm with similar drawdown rules.
How do I calculate the breakeven price after the spread?
Enter your broker's spread in pips in the 'Broker Spread' field of the advanced calculator. The tool instantly calculates your breakeven price — the exact price level where moving your stop loss would result in a zero-cost exit, fully covering the spread. For a Buy trade, the breakeven is always slightly above your entry. For a Sell trade, it is slightly below. This is critical for scalp traders where spread eats a significant portion of the expected profit.
What does the Partial Close calculator show?
When you have a Take Profit set, the calculator shows what happens if you close 50% of your position at that TP: how much profit you lock in, your remaining position size, and two scenarios for the remaining position — if you move your Stop Loss to your entry price, you get a break-even trade on the rest; if you leave the original SL in place, your remaining dollar risk is exactly half the original.
Need an MT4 version?
We build customized MT4/MT5 Expert Advisors and Risk Managers based on your specific requirements. Get a professional on-chart tool for instant execution.
Technical Specifications & Supported Assets
High-Performance Position Sizing Infrastructure
Asset Classes
- Forex (Majors/Minors)
- Commodities (XAU, XAG)
- Crypto (BTC, ETH)
- Indices (US30, NAS100)
Platform Compat.
- MetaTrader 4 (MT4)
- MetaTrader 5 (MT5)
- cTrader & TV
Calculation Types
- Risk Percentage
- Fixed Monetary Risk
- Prop Firm Drawdown Safety
- Spread Cost & Breakeven
- Partial Close Planner
Lot Formats
- Standard Lots (100k)
- Mini Lots (10k)
- Micro Lots (1k)
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