How this calculator works
Required margin is the collateral the broker locks while a leveraged position is open. The formula is (contract size × lots × price) ÷ leverage.
Free margin equals account balance minus required margin and is what's available to open additional positions or absorb floating losses.
Trading example
Trading 1 lot of EUR/USD at 1.0852 with 1:100 leverage requires ≈ $1,085 margin. With a $10,000 balance, free margin is around $8,915.