Calculator.surf

Futures Liquidation & Margin Risk

Approximate liquidation, margin buffer and scenario stress for isolated perpetual futures. Exchange-agnostic, planning-only.

Position & account inputs

Define your futures position and stress assumptions.

Isolated mode approximation

Side

Entry price

Position size

coin

Leverage

Maintenance margin rate

Isolated margin allocated

USDT

Stop-loss price (optional, for buffer calc)

Max adverse move to plan for

Scenario step

Safety buffer above move (for leverage suggestion)

Simplified liq formula: Long ≈ entry × (1 − 1/leverage), Short ≈ entry × (1 + 1/leverage)

Risk metrics & scenarios

Key ratios plus adverse-move stress grid.

0 scenarios

Notional size

–

entry × size

Approx. liquidation price

–

ignoring fees, simplified model

Risk buffers

–

entry→liq and stop→liq distance

Initial margin used

–

notional / leverage vs allocated

Max move vs liq distance

–

planned move vs liquidation gap

Suggested max leverage

–

for move + safety buffer

Adverse move	Scenario price	Unrealized PnL	Margin remaining	Margin ratio	Flag