Futures Position Size Calculator in Whole Contracts

Start with the exact contract specification

A futures price increment has both a quoted size and a cash value. Dividing a price distance by tick size gives stop ticks; multiplying those ticks by tick value gives the modeled gross movement for one contract. CME explains the relationship between price change, contract size and profit or loss. Similar product names do not establish identical tick values.

Enter the hypothetical monetary budget, stop distance in ticks, monetary tick value per contract, and modeled round-trip cost per contract. Keep every monetary input in the same currency. If the contract settles in another currency, document a conversion assumption first. This calculator does not retrieve an exchange specification or a current currency quote.

Calculate a whole-contract example

Assume a budget of 620 units, a stop distance of 18 ticks, a tick value of 12.50 units and an estimated round-trip cost of 5 units per contract. One contract implies 18 × 12.50 + 5 = 230 units at the modeled stop. The raw ratio is 620 ÷ 230, approximately 2.69565.

The result is two whole contracts, implying 460 units under the assumptions. Three contracts would imply 690 and exceed the budget. The unused 160 units are not added to the position automatically. This example is deliberately generic: its numbers describe a hypothetical contract, not a current product recommendation or a claim about broker fees.

Why margin is a separate calculation

A stop-distance budget estimates one adverse-price scenario. Margin is collateral required by an exchange, clearing arrangement or broker. The two quantities can differ substantially. CME describes initial and maintenance margin; requirements and broker policies must be checked for the actual account and session.

A contract count that fits the hypothetical budget may fail margin checks. Conversely, an account may meet margin requirements while the potential market loss exceeds the chosen budget. Overnight holding, delivery deadlines and broker closeout rules introduce requirements that a simple tick calculation cannot resolve.

Check failure modes before comparing accounts

Zero or negative tick value and stop distance are invalid. A zero budget returns zero contracts, and a budget below one modeled contract also returns zero. Decimal stop ticks can represent an estimate, but an actual order price must respect the contract's price grid. Verify that your price distance can be submitted at all.

Stops may fill beyond their intended price, and a stop-limit can remain unfilled. Fees may include exchange, clearing, broker and currency-conversion components. A constant round-trip cost is only an approximation. When comparing a source and follower account, reconstruct each contract's exposure rather than copying the numerical count across a standard and smaller contract. Save the specific month, multiplier, tick size, currency and fee basis with your worksheet so the result remains reproducible.