Crypto Futures Calculator

How the crypto futures calculator works (and where it falls short)

Most position size mistakes happen before the trade is open. Someone picks 20x because it sounds like a reasonable middle-ground number, drops in $500 of margin, and only checks the liquidation price after the position is already underwater. By then the only thing left to do is watch.

That's the gap this crypto futures calculator closes. Plug in your entry price, leverage, position size, and direction. It returns the liquidation price, ROE, profit at any exit, and the margin you actually need to put up. No login, no exchange connection, nothing saved on a server. Open it, run the numbers, close the tab.

Before working out leverage on a single trade, it helps to know which way the broader market is leaning. Our live crypto bubble chart gives you that read in a few seconds, and it sometimes changes the leverage decision before you even open the calculator.

What the calculator gives you back

Hit calculate and four numbers come out.

The liquidation price tells you where the position gets wiped out. Long position, the liquidation sits below your entry. Short position, above. The bigger the leverage, the closer that line creeps toward your entry price. At 20x on a long, a 5% drop is roughly the danger zone. At 50x, a 2% wick can do it.

ROE (return on equity) is what your margin earns or loses, expressed as a percentage of the margin you put in. This is the number people usually mean when they say "I made 200% on this trade." It is not the same as the price movement of the underlying asset. A 10% move on 10x leverage is roughly a 100% ROE. The calculator shows both so you can see the difference.

Profit and loss at exit price is the dollar amount, with fees subtracted on both ends. The fee math here uses standard taker rates of around 0.06% per side. If you are using maker orders or have a discounted fee tier, your real number will be slightly better.

Required margin is straightforward: position size divided by leverage. Useful when you are sizing backwards from a maximum acceptable loss instead of forwards from an arbitrary leverage number.

Liquidation price is where most people get burned

This is the number to stare at before opening the position. Not after.

The math is straightforward in theory. On a long, your liquidation price equals your entry price minus (entry price ÷ leverage), give or take maintenance margin. On a short, you flip the sign. In practice, exchanges layer maintenance margin requirements that scale with position size, so the actual liquidation triggers slightly earlier than the textbook formula suggests. The calculator uses linear approximation, which is close enough for sizing decisions but not exact.

The pattern that catches people: leverage scales risk faster than it scales reward, especially at the high end. Going from 5x to 10x doubles your buying power and roughly doubles your ROE. Going from 25x to 50x doubles your buying power but moves your liquidation from a comfortable distance to roughly two percent away from entry. Two percent is normal Bitcoin noise. It is also where most blown accounts start.

I used to think 50x was reasonable for tight scalps because of how compact the holding period was. I was wrong about that. Even a 30-second scalp can take a 1.5% spike against you if liquidity goes thin, and at 50x that is enough to close the trade for you at the worst possible price. Now I cap at 10x for anything held longer than a minute and 20x for genuine scalps.

A small thing the calculator cannot do: account for funding rates over multi-day holds. If you are paying 0.05% funding three times a day on a long during a strong uptrend, that compounds. After a week the cumulative cost can hit one full percent of your position notional, which moves your real breakeven price up. The calculator's profit number assumes funding is zero. Hold a position overnight and you will need to subtract those costs separately.

ROE versus ROI, and why traders mix them up

These two numbers look similar and are not.

ROI is your return on investment as a fraction of the underlying asset move. If Bitcoin moves from $98,000 to $107,800, that is a 10% ROI on a spot position. Leverage does not change it.

ROE is your return on equity, which means return on the margin you put up. That same 10% Bitcoin move, on a 10x long, is approximately 100% ROE. On 20x, approximately 200%. Leverage scales ROE; it does not touch ROI.

The mix-up matters because most exchange interfaces show ROE by default and call it "PNL%" or just "%". Traders see "+150%" and think the asset moved 150%. It did not. The asset moved roughly 7.5% on 20x leverage. The crypto futures profit calculator on this page shows both numbers separately so you can see the raw asset move and the leveraged return side by side.

When 10x is too much, and when it isn't enough

Leverage choice is mostly about timeframe and volatility, not about how confident you feel.

For positions held under five minutes on a major pair like BTC or ETH, 10x to 20x is reasonable assuming a tight stop loss. The wider your stop, the lower the leverage should be, because the stop and the liquidation price together set your maximum loss, not the leverage number alone. People forget this and run 20x with a 4% stop, which is the same risk as 5x with the same stop, except now the liquidation sits at roughly 5% and the stop sits at 4%, leaving almost no buffer if the stop fails to fill in a fast move.

For overnight or multi-day swings, 3x to 5x is the upper bound for most people. Funding eats more than they expect, daily candles wick further than they expect, and the psychological cost of watching a position bleed for forty hours is higher than they planned for.

For altcoin positions, cut whatever the BTC/ETH leverage would be roughly in half. Alts wick further. The tier system on most exchanges drops the maximum allowable leverage for smaller-cap coins anyway, but even within the allowed range, 10x on a low-cap alt behaves more like 25x on Bitcoin in terms of liquidation risk. If you want to gut-check how an altcoin's volatility compares to Bitcoin or Ethereum before sizing a position, the crypto comparison tool on this site puts them side by side.

The takeaway is simple. Leverage is the coarse knob, position size is the fine one. Most traders adjust the wrong one.

Where the calculator falls short

A few honest limitations.

The calculator does not connect to your exchange. It does not know your actual fee tier, your unrealized PNL on other positions, your cross-margin balance, or whether the maintenance margin on a particular contract is currently elevated. For finalizing a trade, the exchange's own order entry preview will always be more accurate than this tool. Use the exchange preview to pull the trigger; use this calculator earlier, when you are still working out whether the trade makes sense at all.

It also does not handle isolated versus cross margin differently in any meaningful way. If you are running cross margin with multiple positions, the real liquidation behavior depends on the entire account state, not just the position you are calculating. The number this tool gives you is the isolated-margin equivalent, which is conservative for cross-margin setups but inaccurate.

The other thing it does not model is slippage. On a thin order book or during a fast move, your real entry price can be meaningfully worse than the price you typed in, which shifts every other number downstream. For low-liquidity coins or larger position sizes, run the numbers through our slippage calculator before trusting the profit estimate from the futures calculator.

For exchange-specific math, Binance and Bybit both have decent built-in calculators tied to your account that handle fee tiers and cross-margin edge cases. If you are doing serious multi-position management on one exchange, just use theirs. This tool is for the earlier step, the one where you are still working out on the back of an envelope whether the setup is even worth taking.

If you are looking for advanced position-sizing math like Kelly criterion or risk parity across a portfolio, this is not that tool. Spreadsheets still beat web calculators for that work.

A note for people specifically searching for a bitcoin leverage calculator

The math for Bitcoin futures is the same as for any other linear perpetual contract. Leverage, ROE, and liquidation price all calculate identically. The only thing slightly different about Bitcoin specifically is that maintenance margin tiers on the largest exchanges scale by position size more aggressively than they do for altcoins, because position sizes get larger.

Practically: if you are trading $50,000 of BTC notional, the maintenance margin tier is the same as $50,000 of ETH notional on most platforms. At $5 million in notional, BTC may have slightly different tier breaks. The calculator does not know which exchange you are using, so it cannot bake in those tier-specific rates. For position sizes under $100,000 notional, the difference is negligible and you can trust the output. Above that, sanity-check against the exchange's own tier table.

A worked example

Take a long BTC position with $1,000 of margin at 10x leverage, BTC at $98,400. Position size: $10,000 notional. The calculator returns a liquidation price around $88,800. Set a stop at $96,500.

If BTC reaches $101,000 within the day, ROE is roughly 26%. Hit the stop at $96,500, ROE is roughly negative 19%.

The calculation took less than a minute. The decision of whether the trade is actually worth taking took a lot longer. The calculator does not help with that part. It just makes sure the numbers you are deciding between are the right numbers.

To run the numbers on your own setup, scroll back up and use the calculator at the top of the page.