What to know before sizing ES
ES is the CME E-mini S&P 500 future. Its specification is set by the exchange, not the broker: $50 per index point, a minimum price move (tick) of 0.25 points worth $12.50. A single contract is large. At 5,000 on the index it represents $250,000 of exposure, and one point against you costs $50, so a 10 point stop is $500 per contract.
The consequence is granularity. You cannot trade 0.2 of a contract: position size rounds down to whole contracts, and a small account's 1% risk can be less than the smallest ES position. The Micro E-mini (MES) is one tenth the size at $5 per point and exists for that reason. The future trades nearly 24 hours from Sunday evening to Friday afternoon (New York time) with a short daily break, and rolls quarterly in March, June, September and December.
Watch for
- Count in ticks when you can. The tick is 0.25, so a stop of 10 points is 40 ticks, and each tick is $12.50 per contract.
- Round down to whole contracts and recompute the risk. At small account sizes the minimum one-contract risk can exceed your limit. Move to the micro contract instead of widening the risk.
- Margin is set by the exchange and broker, and day-trading margin is often lower than overnight. The calculator shows position value and leverage, not margin. Check your broker's figure.
- Make sure you trade the contract month you are charting. Volume rolls to the next quarterly contract about a week before expiry.
ES contract specifications (example)
| Instrument | E-mini S&P 500 futures (ES) |
|---|---|
| Contract size (example) | $50 per index point; tick 0.25 point = $12.50 (Micro E-mini MES: $5 per point, $1.25 per tick) |
| Value of 1 point per 1 contract | $50.00 at the example price |
| Tick size and value | 0.25 = $12.50 per contract |
| Minimum size and step (example) | 1 contract (the micro contract is one tenth) |
| Example price used | 5,000.00 |
| Currency handling | Priced in USD, so no conversion is needed. |
Example specification. Brokers differ: confirm the contract size, minimum size and step in your platform's contract specification before you size a real trade.
Worked examples for ES
Every number below is computed with the same formulas as the calculator, at the example prices shown, for a USD account.
Value of one point at different sizes
At the example price of 5,000.00, the money value of one point on ES for a USD account:
Sizing a trade on ES from your risk
Account $50,000, risk 1% ($500), stop 10 points. Each point is worth $50.00 per contract, so the exact size is 500 ÷ (10 × $50.00) = 1 contract. Rounded down to a tradable size that is 1, and the real risk is $500.
Full contract or micro (MES)?
Same 10 point stop, 1% risk, at two account sizes. Full contract: $50.00 per point. MES: $5.00 per point.
Dollar risk limit at $10,000 is $100; one full contract risks $500 with this stop.
The math behind the numbers
size = (balance × risk %) ÷ (stop in points × value of 1 point per contract)
round down to a multiple of 1
position value = size × contract × price (converted to USD)Same formulas as the pip value and position size calculators (ES numbers above are examples at the price shown). Rounding down keeps real risk at or below your limit.
To run your own numbers for another currency or contract, use the lot size calculator, the pip value calculator or the position size calculator. How much to risk per trade is a separate question, covered in how much to risk per trade, and the step-by-step is in how to calculate position size.
ES questions
What is the tick value of ES?
One tick is 0.25 index points, which is $12.50 per contract. One full point is four ticks, or $50. The Micro E-mini S&P 500 (MES) is one tenth of that: $1.25 per tick, $5 per point.
How many ES contracts can I trade with a small account?
Work out your dollar risk (account × risk %), divide by stop points × $50, and round down. If the answer is below one, the full-size contract is too large for that stop, and the micro contract (MES) may fit.
What is the difference between ES and SPX500?
ES is the exchange-traded future with a fixed $50 per point. SPX500 or US500 is a broker CFD on the same index whose contract the broker sets. Their prices differ slightly because of futures pricing and dividends.
How much is one point worth on ES?
For a USD account, one point on 1 contract is about $50.00 at the example price of 5,000.00, and $5.00 on MES. Brokers differ, so confirm the contract size before you rely on it.
What size should I trade on ES with $50,000?
It depends on your risk and stop, not on the account alone. With 1% risk and a 10 point stop the example size is 1 contract, which risks $500. Change the stop and the size changes with it. This is arithmetic, not advice.
Know what each point is worth, then place the stop.
Once you know what a point on ES is worth, the stop distance sets your risk. These indicators help you find where the stop belongs.
Last updated November 2026. For education only. Not financial advice. Position sizing limits the loss you plan, but stops can slip and losses can exceed the planned amount. Results depend on your inputs and cannot predict future performance.