Margin calculator
See how much of your money a trade holds as margin while it is open.
Margin needed
3,000.00 USDT
You need about 3,000.00 USDT margin to open this trade.
- Trade size
- 0.5 BTC
- Contracts
- 500
- Margin in your account currency
- 3,000.00 USDT
- Trading fees (open and close)
- 36.00 USDT
- Rebate via RebateFXSample
- 3.60 USDT
- Cost after rebate
- 32.40 USDT
- The rebate rate is a sample, not a live offer.
- Rebates on a share of spread or fees are estimates.
- 0.5 BTC at 1:10 leverage.
- Margin is a deposit, not a fee. You get it back when you close, minus any loss.
- Your trading terminal shows the exact margin. Brokers can apply their own rates.
Spec used for BTC/USDT
- Symbol at KuCoin
- XBTUSDTM
- Contract size
- 0.001 BTC per contract
- Price step (tick)
- 0.1
- Price decimals
- 1Worked out from the broker's figure
- Trade size (contracts)
- Min 1 · step 1 · max 1,000,000Worked out from the broker's figure
- Margin
- Leverage-based, in USDT
- Maximum leverage
- 1:125
- Maker / taker fee
- 0.02% / 0.06%
- Funding
- Every 8 hours
- RebateFX rebate
- 10% of the trading feeSample value — check with your broker
Sources · Checked on 28 Oct 2026.
How this is calculated
- Crypto (USDT): margin = coins × entry price ÷ leverage.
- Trading fee: coins × price × fee %, on the open and again on the close.
- Rebate: the rate per lot × lots, or the rate % of the spread or of the fee.
- OKX Help — Futures PnL calculation rules:
Initial margin = face value * |number of contracts| * multiplier * mark price / leverage
Estimate only. Spread is not included, and other costs only where a line shows them. Your trading terminal shows the exact numbers. This is not investment advice. Read the risk disclosure
How to calculate margin
Margin is the part of your money the broker holds while a trade is open.
- Multiply your lots by the contract size. This is your trade size in the base currency.
- Divide by your leverage.
- For gold and other CFDs, also multiply by the price.
- Convert the result to your account currency at the current price.
Worked examples
The first example uses the calculator's example values; the others change the product and inputs. Every result comes from the calculator above.
EUR/USD on a $10,000.00 account
- 1 lot × 100,000 = 100,000 units of EUR.
- Divide the trade value by the leverage: €100,000.00 ÷ 100 = €1,000.00.
- In your account currency, that is about $1,100.00.
XAU/USD on a $10,000.00 account
- 0.1 lot × 100 = 10 units of XAU.
- Divide the trade value by the leverage: $25,000.00 ÷ 200 = $125.00.
USD/JPY on a $10,000.00 account
- 0.5 lot × 100,000 = 50,000 units of USD.
- Divide the trade value by the leverage: $50,000.00 ÷ 500 = $100.00.
Common mistakes
- Treating margin as a cost. It is a deposit you get back when you close.
- Thinking higher leverage makes a trade safer. It lowers the margin, not the loss.
- Using almost all your balance as margin. A small move can then bring a margin call.
- Forgetting that every open trade holds margin. Each new trade takes more of your free margin.
How a rebate changes this
A rebate does not lower your margin
The rebate is paid after you trade, so the margin a trade holds stays the same. It returns part of your fees, but it does not turn a losing trade into a winning one.
Questions
Is margin a fee?
No. It is a deposit held while the trade is open. You get it back when you close, minus any loss.
What does leverage mean?
It sets how large a trade your margin can open. At 1:100, margin is 1/100 of the trade size.
What are a margin call and a stop out?
A margin call warns that your margin is running low. A stop out closes trades automatically.
Already trading? Part of your fees can come back.
Open your account through RebateFX, and the broker pays part of your fees back to you. Your spread and fees stay the same.
Compare rebates