Do the math before you place the order: how much fees take, how big the position should be, where price gets you liquidated, and what a month of funding costs. Every number is editable, results update instantly, and every formula is laid out.
Fees are charged on notional value (the order size including leverage), once on open and once on close. See what a round trip costs, what share of your margin it takes, and how far price has to move before you break even.
entry notional × entry rate + exit notional × exit rate.entry × (1+o) ÷ (1−c), short entry × (1−o) ÷ (1+c), where o / c are the entry / exit fee rates; roughly o + c.Decide first how much you can lose if the stop is hit, then work backward to the position size. This is also how CoinTech2u's system sizes orders (see What Leverage Actually Is). Change the leverage and you'll see that only the margin changes; the loss at your stop stays the same.
max loss ÷ (stop distance + 2 × one-way fee rate) (the same formula as the calculator in article #95; fees are approximated on entry notional).Liquidation price estimates for USDT-margined linear contracts: how far price has to move against you before the position's margin is down to maintenance margin and the exchange force-closes it.
liquidation price ≈ entry × (1 − 1/leverage + MMR), short liquidation price ≈ entry × (1 + 1/leverage − MMR).entry × (1 − W/notional + MMR), short entry × (1 + W/notional − MMR). With a zero balance it matches isolated; a long result ≤ 0 means price can fall to 0 without liquidation.Perpetuals have no delivery date; funding is what keeps the price tethered near spot. When the rate is positive, longs pay shorts; when it's negative, the reverse. The longer you hold, the less you can ignore it.
Most major contracts settle every 8 hours; some pairs use 4 hours or 1 hour. Check the exchange's contract details page.
notional value × funding rate; rate > 0: longs pay and shorts receive; < 0: shorts pay and longs receive.notional × rate × settlements per day × days; annualized = rate × settlements per day × 365 (relative to notional value; multiply by leverage to get it relative to margin).This page is only a cost and risk estimation tool. Results are simplified estimates and not investment advice; the exchange's rules and order page are what actually apply. Crypto futures trading is extremely risky and you can lose all of your margin.
Fee = notional value × fee rate, charged once on open and once on close. Notional value is the order size including leverage (not your margin), so with the same 1,000 USDT of margin, opening a 10,000 USDT position at 10x costs 10 times the fee of 1x. Maker orders are usually cheaper than Taker orders; the exact rates depend on the exchange's website and your VIP tier.
Let the opening fee rate be o and the closing fee rate be c. Long break-even price = entry × (1+o) ÷ (1−c); short break-even price = entry × (1−o) ÷ (1+c). It doesn't depend on position size or leverage and is approximately o + c. For example, with 0.05% Taker on both sides, a long needs to rise about 0.1% to break even.
Position size (notional value) = max loss ÷ (stop distance + 2 × one-way fee rate), where max loss = account equity × risk per trade. Example: a 10,000 USDT account, 1% risk (100 USDT), a 2% stop distance and a 0.05% fee gives a position size of 100 ÷ 2.1% ≈ 4,761.90 USDT. Margin = position size ÷ leverage, and effective leverage = position size ÷ account equity. Leverage only changes how much margin is tied up; it doesn't change how much you lose when the stop is hit.
Simplified estimate for USDT-margined isolated positions: long liquidation price ≈ entry × (1 − 1/leverage + maintenance margin rate); short liquidation price ≈ entry × (1 + 1/leverage − maintenance margin rate). Example: a long opened at 100,000 with 20x and a 0.5% maintenance margin rate has a liquidation price of about 95,500, 4.5% away. Real exchanges use tiered maintenance margin rates, reserve a closing fee and trigger on mark price, so the actual liquidation price is usually a bit closer than the estimate.
Isolated margin absorbs losses with only that position's margin; cross margin draws on the rest of your available account balance. This page's cross estimate plugs in W = (initial margin + remaining available balance): long ≈ entry × (1 − W/notional + maintenance margin rate), short ≈ entry × (1 + W/notional − maintenance margin rate). It assumes the account holds only this one position; with several positions, the unrealized PnL of the others moves the liquidation price too.
Each settlement you pay or receive: notional value × funding rate. When the rate is positive longs pay shorts; when it's negative shorts pay longs. Total over the holding period = notional × rate × settlements per day × days; annualized = rate × settlements per day × 365. Example: 0.01% every 8 hours (3 times a day) is about 10.95% annualized (relative to notional value). Actual rates change every period; this page estimates with a fixed rate.
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