Playing with contracts for so long, I’ve found that many beginners get stuck on basic calculations. Today, I’ll share the contract margin formulas I’ve organized, hoping to help everyone avoid pitfalls.

First, let’s talk about margins. There are actually two ways to approach margin: one is fixed margin, where the exchange directly specifies how much you need to pay to open a contract. For example, some contracts might require a minimum of 100 USDT, non-negotiable. The other is dynamic margin, which is more flexible. It’s calculated by multiplying the contract value by the margin ratio. For example, if the Bitcoin contract value is 50,000 USDT and the margin ratio is 10%, then your contract margin is 5,000 USDT.

Next is leverage, which is especially important for beginners. Leverage is the contract value divided by the margin. Suppose I open a Bitcoin contract worth 100,000 USDT and only need to pay 10,000 USDT margin, then the leverage is 10x. The higher the leverage, the greater the risk. I personally recommend beginners not to use too high leverage.

Then comes profit and loss calculation, which is most commonly used in practice. When going long, profit = (Close Price - Open Price) ( × Contract Quantity × Contract Multiplier. For example, if I open 10 Bitcoin contracts at 40,000 USDT each, with a multiplier of 0.001 BTC per contract, and then close at 45,000 USDT, my profit is (45,000 - 40,000) ) × 10 × 0.001 = 50 USDT. The logic for short positions is reversed: profit = (Open Price - Close Price) ( × Contract Quantity × Contract Multiplier. If I open at 45,000 and close at 40,000, I also make a profit of 50 USDT. Losses are calculated the same way, just resulting in a negative number.

Finally, and most critically—liquidation price. This must be calculated carefully; otherwise, you might get liquidated unexpectedly. The formula for long liquidation price = Open Price × )1 - Maintenance Margin Rate ÷ Leverage(. For example, opening at 40,000 USDT with 10x leverage and a 5% maintenance margin rate, the liquidation price is 40,000 × )1 - 5% ÷ 10( = 38,000 USDT. The formula for short positions is slightly different: liquidation price = Open Price ÷ )1 + Maintenance Margin Rate ÷ Leverage(. Under the same conditions, it’s 40,000 ÷ )1 + 5% ÷ 10( = 38,095.24 USDT.

Honestly, these formulas look complicated at first, but after using them a few times, you’ll get familiar. The key is to understand the logic behind contract margins and then set leverage and positions according to your risk tolerance. Sometimes, earning less but staying alive is much smarter than going all-in. The contract tools on Gate can automatically calculate these for you, but understanding these formulas gives you peace of mind.