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    Position Size & Risk Budget

    Size a position from a fixed portfolio-risk budget — fee-inclusive, so the reported max loss equals the risk you typed.

    Data basis
    Formula
    1. 1Set risk budget
    2. 2Add entry & stop
    3. 3Get position size
    1. Your risk inputs
    2. Your position
    Position size
    $91.32
    91.3242 tokens
    % of portfolio
    9.13%
    Risk budget
    $10.00
    Portfolio × max risk %
    Max loss (incl. fees)
    $10.00
    Equals your risk budget by construction
    Round-trip fees
    $0.87
    Buy + sell, per-side model
    Break-even price
    $1.01
    After fees, before the stop
    Direction
    LONG
    Stop below entry
    Assumptions behind this estimate
    • Fees use a symmetric per-side model applied to both the buy and the sell; sizing is fee-inclusive so max loss reconciles exactly to your risk budget.
    • Spot only — no margin, borrow cost or funding is modelled, even when the implied size exceeds your portfolio.
    • Slippage and price impact are ignored; fills are assumed at the exact entry and stop prices.
    • The stop is assumed to fill precisely at the stop price (no gapping or partial fills).
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    How this calculation works — the formula, its inputs, what it assumes, and what it does not establish.

    Calculator guide

    How to use this crypto position size calculator

    Size a crypto position from portfolio value, maximum risk and stop distance. The calculator includes fees in maximum loss and can compare the planned reward with the amount at risk.

    Risk-budget position sizing

    The risk budget is the maximum modeled loss for the trade, usually expressed as a percentage of portfolio value. A wider stop requires a smaller position for the same budget.

    Fees and stop distance

    Entry and exit fees consume part of the risk budget. Ignoring them can make actual maximum loss larger than intended.

    Liquidity still limits position size

    Risk-budget math does not guarantee executable entry or stop prices. Thin liquidity and gaps can produce larger losses, so pool-depth analysis remains necessary.

    Understand the assumptions

    Position Size FAQ

    How large should my position be if I only risk X% of my portfolio?

    Size a position from a fixed portfolio-risk budget, with fee-inclusive max loss and R:R. MoonMath labels the data basis for this tool as Formula.

    Is the Position Size a prediction or recommendation?

    No. The Position Size & Risk Budget is an educational scenario tool, not financial advice, a recommendation, or a forecast. Provider coverage, liquidity, routing, fees and market conditions can make real outcomes materially different.

    How does stop-loss distance affect crypto position size?

    For a fixed portfolio-risk budget, a wider distance between entry and stop produces a smaller position, while a tighter stop produces a larger mathematical size.