Tools
Calculators for perpetual futures
These tools run in the browser. Each page states the formula and the assumptions. They do not connect to an exchange, and they are not the sizing PERP KING uses when it trades.
The tools
Position size from risk
Quantity equals the quote amount you are willing to lose, divided by the absolute distance between entry and stop.
Initial margin
Initial margin equals notional divided by leverage.
Risk and reward
Risk distance is the absolute difference between entry and stop. Reward distance is the absolute difference between target and entry.
Fee impact
You type both notionals and both fee rates. PERP KING does not look up the exchange's current schedule.
Funding cost
The magnitude is position notional times the funding-rate fraction times the number of intervals.
Linear perpetual P&L
A long result is the exit price minus the entry price, times quantity. A short result is the entry price minus the exit price, times quantity.
API permission checklist
Compare your answers with what the six integrations ask for. The checklist does not connect to an exchange and does not inspect a key.
Liquidation distance
You type the entry, the leverage and a maintenance-margin percent. The page does not ask an exchange for its tier.
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