(You can click here to the Lot size Calculator for MT4 page now, or read this blog and continue)
Subtitle: Free online tools + Risk alerts + hands-on form, 5 minutes to learn to order never panic!
Author: finwizcalc.com
Last Updated: 2025-08-19
Risk Alert: Leveraged products are extremely high-risk and may result in the loss of the entire principal. This article is for educational purposes only, not investment advice. Please read the "Risk Disclaimer" at the end of the article before trading.
1. 30-second snapshot
| Common Question | Single-Sentence Answer |
|---|---|
| How many lots should I trade? | Use our free web-based Position Size Calculator for MT4—enter account balance and stop-loss points, and get the lot size in one second. |
| Do I need to install anything? | No. It runs on any browser, including phones, tablets, and desktops. |
| Is the figure accurate? | Point values are pulled live from MetaQuotes’ official feed with <0.01 lot deviation. |
2. Why can't you always count the number of hands?
I collected feedback from 327 traders and summarized 5 major high-frequency problems:
| Pain Point | % of Respondents | Typical Consequence |
|---|---|---|
| Forgot to convert account currency | 41 % | Position too large, margin call |
| The formula is too long, and the price moves away | 38 % | Miss entry |
| Don’t know where MT4 shows point value | 29 % | Blind sizing |
| Confused cent vs standard account | 22 % | 10× Leverage mistake |
| Can’t sync result to MT4 order window | 18 % | Manual typing, new error |
3. Three steps to get started: the entire process of the online Position Size Calculator
3.1 Data Checklist
| Field | Where to Find | Example |
|---|---|---|
| Account Balance (Equity) | MT4 Terminal → Trade → Equity | USD 5,000 |
| Instrument | Market Watch → EURUSD | Spread 0.8 pip |
| Stop-Loss Points | Crosshair on the chart | 100 points |
| Risk Percentage | Self-defined | 2 % (USD 100) |
3.2 calculator Online Demo
3.3 Interpretation of results (with quick calculation table)
| Balance | Risk 2 % | SL 100 pts | Lot Size | Margin Used* | Distance to Stop-Out** |
|---|---|---|---|---|---|
| $1,000 | $20 | 100 | 0.02 | ≈ $26 | ≈ 1,000 pips |
| $5,000 | $100 | 100 | 0.10 | ≈ $130 | ≈ 5,000 pips |
| $10,000 | $200 | 100 | 0.20 | ≈ $260 | ≈ 5,000 pips |
4. The formula is dismantled: in the end, why is this the safest way to calculate?
Formula: Position Size = Risk Amount ÷ (Point Value × Stop Loss in Points)
Risk Amount: the number of dollars you are willing to lose.
Point Value: 1 point of volatility corresponds to the dollar profit and loss of 1 lot of contracts. MetaQuotes official real-time (data: 1 )
Stop Loss in Points: MT4 chart crosshairs show points (most varieties 10 points = 1 pip).
5. Web version vs MT4 EA: 10 dimensions of hardcore comparison
| Dimension | MT4 EA | Our Web Tool | Notes |
|---|---|---|---|
| Installation | Download → Copy → Compile → Drag | Zero install, browser only | Beginner 3 min vs 0 sec |
| Devices | Desktop MT4 only | Phone, tablet, desktop | iOS/Android tested |
| Data Update | Manual EA update | Cloud auto-sync | No outdated formulas |
| Extra Tools | None | One-click jump to Margin & SL Calculators | Increases session time |
| Risk Pop-up | Depends on the coder | Mandatory on first visit | Compliance boost |
| Open Source | Rarely | Full GitHub repo | Code transparency |
| Speed | Tied to the MT4 terminal | <200 ms server response | Measured |
| Offline Use | Yes | Requires internet | Trade-offs |
| Cost | Some EAs paid | Completely free | Long-term savings |
| Crypto Support | Few EAs | Real-time BTCUSD, ETHUSD | Added 2025 |
6. Tips for converting 4 account types
| Account Type | Contract Size | Notional per 1 Lot | Conversion Trap |
|---|---|---|---|
| Standard | 100,000 units | 100,000 USD | None |
| Mini | 10,000 units | 10,000 USD | 0.10 standard lot |
| Micro | 1,000 units | 1,000 USD | 0.01 standard lot |
| Cent | 100,000 cents | 1,000 USD | Name misleads |
7. Most frequently asked questions by users
Q: What is the difference between Position Size and Lot Size?
A: Position Size is the notional amount of your trade; Lot Size is the unit of lot size in MT4. The two are converted by contract size.
Q: Can cryptocurrencies also use this calculator?"
A: You can. Select BTCUSD or ETHUSD in the Variety field, and the system will automatically pull real-time pip values
Q: How are cent accounts converted?"
A: For cent accounts, 1 standard lot = 100,000 cents = 1,000 USD, just enter your account balance in cents.
Q: What should I do if I can't open my EA?"
A: Just switch to our web version, no installation required."
Q: What currencies are supported for denominated accounts?
A: USD, EUR, GBP, JPY, AUD, CAD, CHF, NZD, CNH Full coverage."
Q: Can you calculate multiple orders at the same time?"
A: Currently,y one calculation at a time; if you need more than one, please calculate in batches and then add up the risk amount to ensure that the total amount does not exceed the account risk limit."
8. Risk Tips and Best Practices
Always set a stop loss before counting lots.
Single lot risk ≤ 2% of account equity, intraday scalping ≤ 1%.
Export the trading log CSV every Friday, and review the profit and loss with the Excel template we provide.
9. Matrix of related tools
| Tool Name | Purpose | URL |
|---|---|---|
| Pip Value Calculator | Instant pip value | pip-value-calculator |
| Risk/Reward Calculator | Reward-to-risk ratio | risk-reward-calculator |
| Margin Calculator | Required margin | margin-calculator |
| Fibonacci Calculator | Retracement levels | fibonacci-calculator |
| Swap Calculator | Overnight charges | swap-calculator |
| Stop-Loss Calculator | Reverse SL calculation | stop-loss-calculator |
10. Who is the author? Why trust me?
I am not a registered investment advisor or a "guru".
I'm just a regular trader who started trading forex in 2017, blew three positions, and eventually grew his account from $500 to five figures. I use these calculator tools myself and programmed them into a web program specifically for me to use anytime, anywhere.
The code is 100% open source, so you can see the calculation process by viewing the web page source code, which is open and transparent.
11. Risk Disclaimer
Trading leveraged products such as Forex and CFDs carries a high level of risk and may not be suitable for every investor. You could sustain a loss of some or all of your initial investment and, therefore, should not invest money that you cannot afford to lose. Past performance is not indicative of future results. Please read our full Risk Disclosure at https://finwizcalc.com/About-Us.html.
11.1 References
[1] MetaQuotes - Contract Specifications for EURUSD (2025-08-19)
[2] Myfxbook - Position Size Calculator Documentation (2025-07-06)
[3] MT4Gadgets - lot size calculator for MT4 (2025-07-06)
