Forex Position Size Calculator — Lot Size by Risk & Stop‑Loss
Last updated Feb 4, 2026
Position Size Calculator
Calculate lot size by risk — with tick/pip value, stop distance, rounding, margin estimate, and country‑aware broker picks.
Inputs
Fill the fields — results update instantly.
Results
We compute raw lot size, then round down to your selected lot step.
- Position size
- Raw: 0.05 lots
- Risk
- Mode: 1%
- Stop distance
- Stop price: 1.098
- Tick value
- Per 1 lot (per 1 pip)
Notes1 item(s)
- Contract specs vary by broker. Verify contract size, tick size, and minimum lot in your platform.
How the calculator works
We compute how much 1 tick/pip/point costs for 1 lot in your account currency, then size the lot so that StopDistance × TickValue × Lots ≈ Risk.
Lots = Risk / (StopTicks × TickValuePerLot)
For FX when your account currency equals the base currency, we convert quote→base using 1/entry price.
Disclaimer: This tool is for informational purposes only. Contract specs (contract size, tick size, minimum lot, margin rules) can vary by broker and account type. Always verify symbol settings in your trading platform. Trading CFDs involves risk.
Broker picks
Explainable picks from our dataset — tuned to your instrument + preferences.
Risk warning: Your capital is at risk.
Position sizing (aka lot sizing) is one of the simplest ways to manage risk in Forex and CFD trading. This calculator turns your risk limit (either % of balance or a fixed cash amount) into a suggested trade size — in lots and units — based on your stop-loss distance and contract specs.
Unlike many “basic” lot calculators, it also shows pip/tick value, handles currency conversion when your account currency differs from the quote/settlement currency, and rounds down to your broker’s lot step so you don’t accidentally exceed your planned risk. Optionally, you can estimate margin for a chosen leverage.
At the bottom you’ll also see country-aware broker picks from our dataset (with clear reasons and links to full reviews).
What this calculator can do
- Risk modes: % of balance or fixed money risk per trade.
- Stop distance: by pips/points or by exact stop price.
- Contract specs: contract size (units per 1 lot) + pip/tick size.
- Rounding: rounds down to a selected lot step (0.01, 0.1, etc.).
- Conversion rates: only when needed (account currency ≠ quote/settlement currency).
- Optional margin estimate: notional ÷ leverage (leverage varies by broker/instrument).
- Broker picks: explainable, country-aware suggestions (not investment advice).
How to use the calculator
- Choose the instrument and your account currency.
- Enter balance and select the risk mode.
- Set the stop-loss (pips/points or stop price).
- Confirm contract size and lot step (or keep presets).
- Review results: lots, units, money-at-risk, and (optionally) margin.
Notes (important)
- Contract specs can vary by broker — especially for metals, indices, and crypto CFDs. Verify contract size, tick size, and minimum lot in your platform.
- If the calculator asks for a conversion rate, enter it in the direction shown (e.g., 1 USD → ? AUD).
Risk warning: Trading Forex and CFDs involves significant risk. This page is for educational purposes only and is not financial advice.
FAQ
How does the position size (lot size) calculator work?
We take your money risk, your stop distance, and the contract specs to compute the loss per 1 lot at the stop. If needed, we convert into your account currency, then derive a lot size and round it down to your chosen lot step.
What's the difference between lots and units?
Lots are a broker/platform sizing convention. Units are the underlying quantity. In FX, 1 standard lot is typically 100,000 units of the base currency, but CFDs can differ — that’s why contract size matters.
What is pip value / tick value?
It’s how much one pip (or one tick) is worth in your account currency for a given position size. It’s the key link between stop distance and money risk.
Why do you round down to a lot step?
Brokers usually allow only fixed increments (like 0.01). Rounding down ensures your final rounded position does not exceed your planned risk.
When do I need a conversion rate?
When your account currency is different from the quote/settlement currency of the instrument. The calculator will prompt you and show the exact direction (e.g., 1 USD → ? AUD).
Does leverage change the recommended lot size?
Leverage affects margin requirement, not the stop-loss risk itself. The tool shows margin separately so you can confirm you have enough free margin.
Can I use it for gold (XAU/USD), indices, or other CFDs?
Yes — as long as the contract size and tick/pip size are correct. These specs can vary by broker, so always verify them in your trading platform.
Do I need an account? Is my data saved?
No login needed. Your settings are stored locally in your browser (local storage). Clearing site data resets everything.
How do broker picks work?
We rank brokers using our dataset and your preferences, prioritizing brokers available in your country when that data exists. Picks are explainable and link to full reviews; they are not personal financial advice.
