Note: This calculator uses approximate values for illustration. Actual spreads, margin rates and funding costs vary by broker, market conditions and time of day. Overnight funding shown is an estimate based on SONIA + typical broker markup. Always check your broker's live rates before trading.
How to use this calculator
Select the market you want to trade, choose your direction (buy if you think the price will rise, sell if you think it will fall), and enter your stake per point. The calculator instantly shows your spread cost, margin requirement and overnight funding charges.
To calculate profit or loss, enter both an entry and exit price. The calculator deducts spread and funding costs to show your net result — helping you understand the true cost of a trade before you open it.
Margin is based on FCA retail leverage limits: 30:1 for major forex (3.33%), 20:1 for indices (5%), 10:1 for commodities (10%), and 5:1 for shares (20%). Overnight funding uses an approximate annual rate of 6.23% (SONIA + typical broker markup) — the actual rate varies by broker.