How to Calculate Lot Size for Ethereum (ETHUSD): Contract Size and Position Sizing
BY TIOmarkets
|March 21, 2026Ethereum is one of the most actively traded cryptocurrency CFDs in retail markets, with a price that can move hundreds of dollars in a single session.
Before placing an ETHUSD trade, understanding how lot sizes translate into actual ETH exposure, what each dollar move in the Ethereum price is worth, and how much margin a given position requires gives you the foundation to size trades deliberately and manage risk consistently.
This guide covers how ETHUSD contracts are structured at TIOmarkets, how to calculate dollar value per price move, how to work out required margin, and how to apply a position sizing formula.
ETHUSD Contract Structure
At TIOmarkets, one standard lot of ETHUSD represents 10 ETH coins. The minimum lot size is 0.01 lots, which represents 0.1 ETH. Positions can be sized in increments of 0.01 lots, giving traders control over their ETH exposure from 0.1 coins at the minimum up to 200 coins at the maximum of 20 lots per trade.
ETHUSD is quoted in US dollars per ETH coin, meaning the price on your chart represents what one ETH is worth in USD. All profit, loss, and margin calculations are denominated in USD.
Dollar Value Per Price Move
ETHUSD is quoted to three decimal places, making the minimum tick USD 0.001 per coin. On a standard lot of 10 ETH, one minimum tick equals USD 0.01. However, because Ethereum regularly moves tens or hundreds of dollars in a session, the more practical unit for position sizing is the dollar-per-coin move.
For a USD 1.00 move in the Ethereum price:
Standard lot (1.0, 10 ETH): USD 1.00 x 10 = USD 10.00 per dollar move. Mini lot (0.10, 1 ETH): USD 1.00 x 1 = USD 1.00 per dollar move. Micro lot (0.01, 0.1 ETH): USD 1.00 x 0.1 = USD 0.10 per dollar move.
To put this in practical terms: a USD 100 move in the Ethereum price on a standard lot position produces a USD 1,000 change in profit or loss. On a 0.10 lot it produces USD 100, and on a 0.01 lot it produces USD 10. Given that Ethereum can move several hundred dollars in a single trading session, working out the dollar value of price moves relative to your lot size before entering a position is an important step in understanding your exposure.
Calculating Required Margin for ETHUSD
ETHUSD carries a 10% margin requirement at TIOmarkets, corresponding to leverage of 1:10. Because the margin is a percentage of the notional value of the position, and the notional value is based on the current Ethereum price, the required margin changes as the ETH price moves.
The formula is: required margin = lot size x coins per lot x current ETH price x margin percentage.
Using an illustrative Ethereum price of USD 2,150 (this is an example only and not a current market quote):
Standard lot (1.0): 1.0 x 10 x USD 2,150 x 0.10 = USD 2,150. Mini lot (0.10): 0.10 x 10 x USD 2,150 x 0.10 = USD 215. Micro lot (0.01): 0.01 x 10 x USD 2,150 x 0.10 = USD 21.50.
Because Ethereum prices can vary significantly over time, the required margin at any given moment may differ substantially from these illustrative figures. Use TIOmarkets' margin calculator at tiomarkets.com/margin-calculator to get the exact margin requirement at the current price before placing a trade.
Leverage on ETHUSD is subject to change depending on market conditions and applicable regulatory requirements.
Position Sizing for ETHUSD
Position sizing determines what lot size to use so that your potential loss, if your stop loss is triggered, stays within a defined limit relative to your account balance. The consistent approach is to set a maximum risk percentage per trade, then work backwards to the appropriate lot size.
The formula is: lot size = account risk in USD / (stop loss in USD x dollar value per lot per $1 move).
Worked Example
Suppose you have a USD account with a balance of USD 3,000. You are willing to risk 1% per trade, which is USD 30. Your analysis of the ETHUSD chart suggests a stop loss USD 50 below your entry price.
Dollar value per standard lot per $1 move: USD 10.
Lot size = USD 30 / (50 x USD 10) = USD 30 / USD 500 = 0.06 lots.
Trading 0.06 lots with a USD 50 stop loss risks USD 30 if the stop is triggered, exactly matching the 1% risk limit. At USD 2,150 per ETH, a 0.06 lot position represents 0.6 ETH with a notional value of USD 1,290 and a required margin of approximately USD 129.
If your stop were tighter at USD 25, the same USD 30 risk budget would support 0.12 lots. If your stop were wider at USD 100, you would need to reduce to 0.03 lots to stay within the same risk limit. The formula ensures your lot size adjusts to your stop distance, keeping risk consistent regardless of how volatile conditions are at the time of the trade.
Using TIOmarkets' Calculators for ETHUSD
TIOmarkets provides an online calculator suite at tiomarkets.com to help traders work through position sizing before placing a trade.
The margin calculator at tiomarkets.com/margin-calculator takes your instrument, account currency, leverage, and lot size as inputs and returns the required margin at current prices. For ETHUSD, entering your lot size gives the exact margin figure at the current Ethereum price, which is more reliable than a manual calculation using an illustrative price.
The profit calculator at tiomarkets.com/profit-calculator allows you to model a trade by entering your open price, close price, lot size, and account currency, returning an estimated profit or loss. This is useful for checking how a specific stop loss or take profit level translates into USD before committing to the trade.
Spreads, Commissions and Overnight Financing
ETHUSD spreads at TIOmarkets are variable and fluctuate with market conditions. Crypto CFD spreads can widen significantly during periods of high volatility, around major announcements, and at market open and close. Minimum spread figures represent the lowest observed under favourable conditions and are typically higher in practice. On a Raw account, a commission of USD 6 per round turn lot applies, charged in full when the position is opened and covering both the open and close of the trade. On Standard and VIP Black accounts there is no commission, with costs reflected in the spread.
Overnight financing on ETHUSD should be checked inside the MT4 or MT5 platform before holding positions overnight.
ETHUSD Trading Hours
ETHUSD trades from 00:00 to 24:00 Monday through Thursday and from 00:00 to 23:00 on Friday. The market is closed on Saturday and Sunday. Despite the common perception that Ethereum trades continuously, TIOmarkets' ETHUSD CFD instrument follows a defined weekly schedule and is not available at weekends. All times refer to MetaTrader server time.
FAQ
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TIOmarkets offers an exclusively execution-only service. The views expressed are for information purposes only. None of the content provided constitutes any form of investment advice. The comments are made available purely for educational and marketing purposes and do NOT constitute advice or investment recommendation (and should not be considered as such) and do not in any way constitute an invitation to acquire any financial instrument or product. TIOmarkets and its affiliates and consultants are not liable for any damages that may be caused by individual comments or statements by TIOmarkets analysis and assumes no liability with respect to the completeness and correctness of the content presented. The investor is solely responsible for the risk of his/her investment decisions. The analyses and comments presented do not include any consideration of your personal investment objectives, financial circumstances, or needs. The content has not been prepared in accordance with any legal requirements for financial analysis and must, therefore, be viewed by the reader as marketing information. TIOmarkets prohibits duplication or publication without explicit approval.
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