How to Use the Lot Size Calculator

Convert Lots to Units with Confidence

Trading platforms and broker statements often reference different units (lots, mini lots, micro lots, units). Our Lot Size Calculator removes the guesswork so you know exactly how many currency units you're trading.

Lot Size Basics

Standard Lot: 1.00 lot = 100,000 currency units
Mini Lot: 0.10 lot = 10,000 units
Micro Lot: 0.01 lot = 1,000 units
Nano Lot: 0.001 lot = 100 units (offered by few brokers)

Forex brokers quote position size in lots
Some tools (including our Pip Calculator) require units
This calculator converts instantly between the two

Using the Calculator Step-by-Step

1. Select Account Currency

Choose the currency your trading account is denominated in. This ensures unit conversions consider the correct base currency.

2. Choose Currency Pair

Select the pair you plan to trade (EUR/USD, GBP/JPY, etc.). The calculator adjusts unit conversions if your account currency differs from the pair's base currency.

3. Enter Lot Size or Units

Know Lots? Type the lot size (e.g., 0.25 lots). The calculator converts to units.
Know Units? Enter total units (e.g., 17,500 units). The calculator converts to standard, mini, and micro lots.

4. Review Detailed Output

The results include:

Total units
Equivalent standard, mini, and micro lots
Notional trade value in account currency
Required margin preview (if leverage field enabled)

Practical Example

Scenario: You want to trade exactly 15,000 units of EUR/USD.

Enter account currency: USD
Select pair: EUR/USD
Input units: 15,000
Results:
- Standard Lots: 0.15
- Mini Lots: 1.5
- Micro Lots: 15
- Notional Value: €15,000 (converted to USD at current rate)

Execution Tip: Check your broker's minimum lot step. Many accept 0.01 increments; some ECN brokers allow 0.001.

Use Cases

Pip Calculator Input: Convert lot size to units before calculating pip value.
Risk Management: Combine with Position Size Calculator to double-check final trade size.
Journal Accuracy: Record exact units in your trading journal for performance analytics.
Partial Closures: Plan partial exits (e.g., close 0.30 lots from a 0.75 lot position).

Tips & Best Practices

Round Smartly: If calculator suggests 0.37 lots and your broker only allows 0.1 increments, round to 0.30 or 0.40 and adjust stop size accordingly.
Check Contract Size: Some CFD products (indices, oil) use different contract sizes—verify with broker specs.
Match Account Currency: When account currency differs from base pair (e.g., GBP account trading EUR/USD), double-check conversion results.