BTC Contract Position Calculator
Risk-control position sizing calculator. Enter your entry price, stop loss, margin, and max risk tolerance — get the exact number of contracts to open. Supports USDT-Margined (linear) and Coin-Margined (inverse) contracts.
Contract Type
Price
Risk Management
▸ Advanced: Funding Rate
Results Appear Here
Fill in the inputs and click Calculate to see your position size, max loss, liquidation price, and more.
How to Use the BTC Position Calculator
1. Choose Contract Type
USDT-M (U-Based): Linear contracts where margin and PnL are in USDT. Used on Binance USDⓈ-M. 1 contract = 0.01 BTC. Best for most traders.
Coin-M (Inverse): Inverse contracts where margin and PnL are in BTC. Used on Binance COIN-M. 1 contract = $100 face value. Best for BTC-denominated accounts.
2. Set Direction and Price
Choose Long (bet price rises) or Short (bet price falls). Enter your entry price and stop loss — the distance between them determines your per-contract risk.
3. Configure Risk Management
Enter your available margin (collateral) and leverage. Then set your max risk percentage — this is the maximum loss you're willing to take on this single trade as a percentage of your margin. The calculator ensures:
Single trade loss ≤ Margin × Risk %
4. Read Your Results
The calculator outputs suggested contracts (floored to 0.1), position size in BTC, notional value, required margin, max loss, actual risk %, potential profit, risk/reward ratio, and liquidation price. All warnings are shown in yellow.
Why Use a Risk-Control Calculator?
Most traders focus on profit targets and ignore risk. Professional traders do the opposite: they define their max loss FIRST, then calculate position size accordingly. This calculator enforces that discipline — it will never suggest a position where your stop loss exceeds your predetermined risk tolerance.
Frequently Asked Questions
How to calculate position size with stop loss?
The formula is simple: divide your acceptable dollar loss by the per-contract risk distance. If you risk $30 per trade and your stop loss is $600 away from entry, you can open 5 contracts (USDT-M, where each contract = 0.01 BTC with a $6 risk per $600 move). Our calculator automates this — just enter your stop loss price, margin, and risk percentage.
What's the difference between USDT-M and coin-margined position sizing?
USDT-M (linear) contracts are simpler: margin is in USDT, 1 contract = 0.01 BTC, and the position size formula is contracts = (margin × risk%) / (0.01 × |stopLoss - entry|). Coin-margined (inverse) contracts use BTC as margin with a $100 face value per contract. The inverse formula accounts for non-linear PnL: contracts = (margin_btc × risk%) / (100 × |1/stopLoss - 1/entry|). Most calculators only support linear — ours handles both.
How many contracts should I open in crypto futures?
The answer depends entirely on your stop loss distance and risk tolerance, not on how confident you feel. A trader with a $1,000 margin risking 2% at a $300 stop distance opens fewer contracts than one risking 5% at a $100 stop. Our calculator prevents overleveraging by making position size a result of your risk parameters, not an input guess.
What leverage should I use for BTC futures trading?
Leverage determines your margin requirement, not your risk. At 5x or 50x, if your stop loss is hit, you lose the same dollar amount — the difference is only how close your liquidation price sits to your entry. For most traders, 5x–20x provides a good balance between capital efficiency and liquidation safety. Our calculator shows your exact liquidation price at any leverage level.