EUR/USD is the most traded pair in the world and the easiest to size correctly: one standard lot is 100,000 euros, one pip is 0.0001, and a pip is worth $10 per lot on a USD account — no conversion, no moving parts. This calculator takes your balance, risk per trade and stop loss in pips and returns the exact lot size, down to the micro lot.
EUR/USD contract facts
| Item | Value |
|---|---|
| Standard lot | 100,000 EUR |
| Mini / micro lot | 10,000 / 1,000 EUR |
| Pip | 0.0001 (4th decimal; most brokers quote a 5th "pipette") |
| Pip value, 1 lot | $10.00 on a USD account |
| Pip value, 0.10 lot / 0.01 lot | $1.00 / $0.10 |
| Typical spread | 0.0–1.0 pip on ECN/raw accounts |
| Typical daily range | roughly 50–80 pips, wider around data |
| Most liquid hours | London open through the London–New York overlap (roughly 08:00–17:00 UTC) |
Because the quote currency is USD, the pip value is fixed. That is not true for USD/JPY or USD/CAD, where the pip value moves with the exchange rate — use the pair-specific calculators for those.
The lot size formula for EUR/USD
Lot size = (Account balance × Risk %) ÷ (Stop loss in pips × $10)Example 1 — $10,000 account, 1% risk, 20-pip stop:
- Risk amount: $100
- Loss per lot at 20 pips: $200
- Lot size: $100 ÷ $200 = 0.50 lots
Example 2 — $2,000 account, 1% risk, 15-pip stop:
- Risk amount: $20
- Loss per lot: $150
- Lot size: 0.13 lots
Example 3 — $100,000 prop-firm account, 0.5% risk, 30-pip stop:
- Risk amount: $500
- Loss per lot: $300
- Lot size: 1.67 lots
Quick reference: EUR/USD lot size at 1% risk
| Account | 10-pip stop | 20-pip stop | 30-pip stop | 50-pip stop |
|---|---|---|---|---|
| $1,000 | 0.10 | 0.05 | 0.03 | 0.02 |
| $5,000 | 0.50 | 0.25 | 0.17 | 0.10 |
| $10,000 | 1.00 | 0.50 | 0.33 | 0.20 |
| $50,000 | 5.00 | 2.50 | 1.67 | 1.00 |
| $100,000 | 10.00 | 5.00 | 3.33 | 2.00 |
Halve every figure for 0.5% risk; double it for 2%.
Five things that change EUR/USD sizing in practice
- Spread and slippage widen the real stop. A 20-pip chart stop filled with a 0.5-pip spread and half a pip of slippage is a 21-pip stop. Size on 21. On an ECN account this is minor; on a 2-pip standard account it is a 10% difference.
- News compresses the room. ECB decisions, Fed decisions, US CPI and non-farm payrolls regularly move EUR/USD 50–100 pips in minutes. A 15-pip stop placed before the release is a coin flip, and the fill can be well past it.
- Range decides the stop, the stop decides the size. EUR/USD commonly moves 50–80 pips a day. A 10-pip stop on a 4-hour setup is inside the noise; a 40-pip stop on a scalp is outside the reward. Set the stop from the chart's structure and let the lot size follow.
- Correlation stacks risk. A long EUR/USD and a short USD/CHF are close to the same trade. Two 1% positions there are effectively a 2% position.
- Session matters for scalpers. Spreads are tightest in the London–New York overlap and widest in the late New York and early Asian hours, when a 20-pip stop can be a 23-pip stop.
Common EUR/USD sizing mistakes
- Sizing by leverage. 1:100 leverage lets a $1,000 account open 1 lot, where a 20-pip loss is $200 — a fifth of the account. Leverage limits what you can open, not what you should.
- Fixed lot size regardless of stop. 0.5 lots with a 15-pip stop and 0.5 lots with a 60-pip stop are a 4× difference in risk.
- Rounding up. 0.13 lots is 0.13, not 0.15. Small roundings compound over hundreds of trades.
- Ignoring the pipette. On a 5-digit quote, 1.08500 → 1.08520 is 2 pips, not 20. Count pips at the 4th decimal.
Track your EUR/USD trades in Fips
Fips's free trading journal records every EUR/USD trade with its R-multiple, pip result and session, so you can see whether your London trades outperform your New York trades and whether your stops are too tight for the pair's range. Connect an MT4, MT5 or cTrader account and trades import automatically. The backtesting tools let you check a EUR/USD setup's historical win rate and worst losing streak before you risk real money, and the economic calendar flags the ECB, Fed and US data releases that move the pair.
Frequently asked questions
How much is 1 pip on EUR/USD?
$10 per standard lot, $1 per mini lot and $0.10 per micro lot on a USD-denominated account. On a EUR-denominated account it is $10 converted at the current rate — roughly €9.
What lot size should I use on a $1,000 EUR/USD account?
At 1% risk ($10) and a 20-pip stop, 0.05 lots. At a 10-pip stop, 0.10 lots. Most brokers allow 0.01-lot increments, so a small account can size precisely.
Is 0.01 lots a good size for beginners?
It is the smallest size most brokers offer and risks $0.10 per pip — a 20-pip loss is $2. It is a good size for learning execution, but the right size is always the one the formula gives for your balance, risk and stop.
What is a reasonable stop loss on EUR/USD?
It depends on the timeframe. Intraday setups commonly use 10–25 pips, 4-hour setups 30–60, daily setups 80–150. Whatever the stop, size the position so the loss is the percentage you chose.