Why You Must Calculate Before You Trade

The number one reason traders get liquidated isn’t bad market analysis — it’s entering trades without understanding the numbers. They don’t know their liquidation price, don’t account for fees, and get surprised when a “small” move wipes their position.

Binance has a built-in futures calculator. Here’s how to use it — and how to do the calculations yourself so you always know your exact risk.

Accessing the Calculator

On the Binance futures trading page:

  1. Click the calculator icon (usually in the top-right area of the trading panel)
  2. Select the calculation type: PnL, Target Price, or Liquidation Price
  3. Enter your parameters and click Calculate

Alternatively, you can calculate manually using the formulas below — which is what experienced traders do.

PnL (Profit and Loss) Calculation

The formula:

For Long positions:

PnL = Position Size × (Exit Price - Entry Price) / Entry Price

For Short positions:

PnL = Position Size × (Entry Price - Exit Price) / Entry Price

Example: BTC Long

  • Entry price: $60,000
  • Exit price: $63,000
  • Position size: $10,000 (at 10x leverage, margin = $1,000)
PnL = $10,000 × ($63,000 - $60,000) / $60,000
PnL = $10,000 × 0.05
PnL = $500 (50% return on $1,000 margin)

Example: BTC Short

  • Entry price: $60,000
  • Exit price: $57,000
  • Position size: $10,000
PnL = $10,000 × ($60,000 - $57,000) / $60,000
PnL = $10,000 × 0.05
PnL = $500 (50% return on margin)

Including fees in PnL:

Real PnL must account for entry fee, exit fee, and any funding payments:

Real PnL = Gross PnL - Entry Fee - Exit Fee - Funding Fees

Using the long example with referral + limit orders:

  • Gross PnL: $500
  • Entry fee: $10,000 × 0.016% = $1.60
  • Exit fee: $10,000 × 0.016% = $1.60
  • Funding (held 2 days, 6 payments × 0.01%): $10,000 × 0.06% = $6.00
  • Real PnL: $500 - $1.60 - $1.60 - $6.00 = $490.80

Without discounts (market orders):

  • Entry fee: $10,000 × 0.05% = $5.00
  • Exit fee: $10,000 × 0.05% = $5.00
  • Funding: $6.00
  • Real PnL: $500 - $5.00 - $5.00 - $6.00 = $484.00

Difference: $6.80 per trade. Over 200 trades/year: $1,360 more profit with referral code RATE20 + limit orders.

ROE (Return on Equity) Calculation

ROE tells you the percentage return on your actual invested margin, not the total position:

ROE = (PnL / Margin) × 100%

Or more simply:

ROE = Price Change % × Leverage

ROE examples at different leverage:

Price Change2x Leverage5x10x20x
+1%+2%+5%+10%+20%
+5%+10%+25%+50%+100%
-1%-2%-5%-10%-20%
-5%-10%-25%-50%-100% (liquidated)

This table makes it clear why high leverage is dangerous. At 20x, a mere 5% adverse move means total loss.

Margin Calculation

Margin is how much USDT you need in your futures wallet to open a position.

Initial Margin:

Initial Margin = Position Size / Leverage

Maintenance Margin:

The minimum margin required to keep the position open. This varies by position size:

Position Size (USDT)Maintenance Margin Rate
0 - 50,0000.40%
50,000 - 250,0000.50%
250,000 - 1,000,0001.00%
1,000,000+2.50%

Example:

  • Position size: $20,000
  • Leverage: 10x
  • Initial margin: $20,000 / 10 = $2,000
  • Maintenance margin: $20,000 × 0.40% = $80

You need $2,000 to open the position, and your account must stay above $80 to avoid liquidation.

Liquidation Price Calculation

This is the most important calculation. It tells you exactly where Binance will forcibly close your position.

For Long positions (Cross Margin):

Liquidation Price = Entry Price × (1 - 1/Leverage + Maintenance Margin Rate)

For Short positions (Cross Margin):

Liquidation Price = Entry Price × (1 + 1/Leverage - Maintenance Margin Rate)

Examples: BTC Long at $60,000

LeverageLiquidation PriceDistance from Entry
2x~$30,300-49.5%
3x~$40,400-32.7%
5x~$48,240-19.6%
10x~$54,240-9.6%
20x~$57,240-4.6%
50x~$58,896-1.8%
100x~$59,460-0.9%

Cross vs Isolated Margin:

Cross Margin: Your entire futures wallet balance is used as margin. Liquidation is less likely, but if it happens, you lose your entire futures balance.

Isolated Margin: Only the margin allocated to this specific position is at risk. Liquidation happens sooner, but your loss is limited to that position’s margin.

Recommendation: Use Isolated Margin for individual trades. It limits your risk per position and prevents a single bad trade from draining your entire futures wallet.

Target Price Calculation

If you want to know what price is needed to achieve a specific ROE:

For Long:

Target Price = Entry Price × (1 + Target ROE / Leverage)

For Short:

Target Price = Entry Price × (1 - Target ROE / Leverage)

Example: 50% ROE target on BTC Long at $60,000, 10x leverage:

Target Price = $60,000 × (1 + 50% / 10)
Target Price = $60,000 × 1.05
Target Price = $63,000

BTC needs to move just 5% for you to double half your margin at 10x leverage.

Complete Pre-Trade Checklist

Before every futures trade, calculate:

  1. Position size: Based on your risk tolerance (max 2% of account per trade)
  2. Margin required: Position size / leverage
  3. Liquidation price: How far can price move against you?
  4. Stop-loss placement: Must be above liquidation price (with buffer)
  5. Risk in dollars: Position size × stop-loss distance %
  6. Take-profit target: At least 2x your risk
  7. Fees: Entry + exit + estimated funding
  8. Net profit at target: Gross profit - all fees

Example pre-trade calculation:

  • Account balance: $5,000
  • Max risk: 2% = $100
  • Strategy stop-loss: 1.5% from entry
  • Leverage: 5x
  • Maximum position size: $100 / (1.5% × 5) = $1,333… round to $1,300
  • Position with leverage: $6,500
  • Entry: $60,000 (BTC long)
  • Stop-loss: $59,100 (-1.5%)
  • Take-profit: $61,800 (+3%, giving 2:1 reward/risk)
  • Entry fee (limit + referral): $6,500 × 0.016% = $1.04
  • Exit fee: $1.04
  • Max loss if stopped: ~$100 (as planned)
  • Profit at target: $195 - $2.08 fees = $192.92

This is how professional traders approach every single position. The calculations take 2 minutes and prevent catastrophic errors.

Sign up with referral code RATE20 to ensure your fee calculations use the discounted rates from day one.

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