Binance ロスカット価格計算ツール

Long 1 BTC on BTCUSDT perpetuals at an entry price of $65,000 with 20x isolated leverage. Position notional = 1 × $65,000 = $65,000. Initial margin (IMR = 1/20 = 5%) = $3,250.

On Binance's BTCUSDT tiered margin schedule, a $65,000 notional sits in the lowest bracket. Maintenance Margin Rate (MMR) = 0.40% = 0.004. Maintenance Amount (cum_b) for that bracket = 0 USDT. These values are published in the 'Leverage & Margin' table on the Binance Futures page for each symbol.

Liq Price = (Wallet Balance + Maintenance Amount − Position Size × Entry Price) ÷ (Position Size × (MMR − 1)). Plugging in: (3,250 + 0 − 1 × 65,000) ÷ (1 × (0.004 − 1)) = (−61,750) ÷ (−0.996) ≈ $62,002.

The shorthand Entry × (1 − IMR + MMR) = 65,000 × (1 − 0.05 + 0.004) = 65,000 × 0.954 = $62,010 lands within ~$8 of the exact answer because the bracket's Maintenance Amount is zero. The approximation breaks down at higher tiers where Maintenance Amount is non-zero.

Binance's displayed liquidation price excludes future funding payments and trading fees, which gradually pull the liq price closer to entry on a long that pays funding. Adding margin to an isolated position (Wallet Balance ↑) pushes the long liq price down; withdrawing margin pushes it up. Recalculate after every margin change.

On binance.com/en/futures/BTCUSDT (or your chosen pair), the calculator icon sits in the top-right of the order entry panel, next to the leverage selector. The same calculator is available in the mobile app under the position screen.

The calculator has three tabs: PnL (returns a profit/loss given entry, exit and size), Target Price (returns the exit price needed for a target ROE%), and Liquidation Price. They share inputs but solve for different unknowns — make sure you're on the Liquidation Price tab before reading the output.

In Isolated mode the calculator asks for entry price, leverage, position size and direction, and computes liq price from the margin allocated to that single position. In Cross mode the input set changes — your full futures wallet balance backs the position, so the displayed liq price moves whenever your wallet balance or other open positions change.

On an isolated long, increasing the assigned margin in the calculator pushes the liq price further below entry; reducing it pulls liq price toward entry. This lets you size a margin add (e.g. 'how much USDT do I need to move liq from $58k to $55k?') before clicking Add Margin on the live position.

The displayed liquidation price is a snapshot at t=0. It does not include the 0.05% taker fee on close, accumulated funding payments (charged every 8 hours on Binance perpetuals), or any future MMR change if your notional grows into a higher bracket. On a position held for days or weeks, the real liq price drifts — recompute periodically.