How to Calculate Position Size in Crypto (Formula and Examples)

Author: Crypffalo Research · 22:47 23/10/2026

The position sizing formula: Position = Capital × Risk % ÷ Stop distance %. Worked examples for spot, leveraged futures, scaling in, fees, and capping total open risk.

How to Calculate Position Size in Crypto (Formula and Examples)

The right question before a trade is not "how much should I buy to make the most" but "how much do I lose if I am wrong". Risk-based position sizing answers exactly that.

This guide goes from the core formula to spot, futures, scaling in, and capping total risk across several open trades. You can check every number with the position size calculator.

Quick summary

Formula: Position size = Capital × Risk % ÷ Stop distance %.
Risk level: beginners should risk 1% of capital per trade, 2% at most.
Stop first, size second: place the stop from price structure, then calculate size.
Leverage: only reduces margin; it does not change what you lose at the stop.
Total risk: keep the sum of all open trades under about 5–6% of capital.

Why calculate position size?

Two traders buy the same coin at the same price with the same stop. One uses 10% of capital and loses 0.5% when wrong; the other uses 80% and loses 4%. The difference is size, not coin choice.

When every trade risks a small fixed share, a run of 5–6 losses still leaves you able to recover.

The position size formula

Step 1, money at risk: Capital × Risk %. 2,000 USDT at 1% → 20 USDT.
Step 2, stop distance: (Entry − Stop) ÷ Entry. Entry 3.00, stop 2.80 → 6.67%.
Step 3, position size: Money at risk ÷ Stop distance. 20 ÷ 6.67% ≈ 300 USDT.
Step 4, coins: 300 ÷ 3.00 = 100 coins.

If price hits 2.80 you lose about 20 USDT, exactly 1%. If you take profit at 3.40 you gain about 40 USDT, a 1:2 risk-reward.

Risk-based position sizing, example with 2,000 USDT capital.

Reference table: 2,000 USDT capital, 1% risk (20 USDT)

Stop distance	Position size	Note
2%	1,000 USDT	Tight stop, larger size
5%	400 USDT	Typical short swing
8%	250 USDT	Volatile altcoin
12%	~167 USDT	Wide stop on a higher timeframe

The wider the stop, the smaller the size, so the loss stays at 20 USDT.

The wider the stop, the smaller the position, with the same loss.

Position size for futures

In futures, the formula gives you the position value, not the margin. Leverage only decides how much margin you post.

A 1,000 USDT position at 5x needs about 200 USDT margin.
The same position at 10x needs about 100 USDT margin.
Either way, a stop 2% away loses about 20 USDT.

A common mistake is picking leverage first and then "using all available margin". Size is then set by leverage, not by risk. Make sure your liquidation price sits well beyond your stop.

Do not forget fees and slippage

Trading fees: opening and closing fees add to the loss. On 1,000 USDT at 0.05% per side, fees are about 1 USDT.
Slippage: a market stop can fill worse than its price, especially on big news such as FOMC night.
Fix: keep a small buffer, for example size at 0.9% instead of 1%, or check net results with the crypto profit calculator.

Scaling in

Many traders enter 2–3 times within one zone. Then the total risk of the whole group is what must stay within 1–2%.

2,000 USDT capital, 1% total risk = 20 USDT, shared stop at 2.80.
Buy 1 at 3.00 (6.67% away), buy 2 at 2.90 (3.45% away).
Split the risk: 10 USDT each → buy 1 about 150 USDT, buy 2 about 290 USDT.

Even if both fill, the maximum loss is still 20 USDT.

Capping total risk across trades

Open risk: add up what every trade loses if all stops hit. Keep it under about 5–6% of capital.
Correlated coins: three altcoin longs usually fall together when Bitcoin drops, so treat them as one large trade.
After a losing streak: cut risk to 0.5% per trade until you are winning again.

Mistakes that break the formula

Moving the stop further away when price goes against you.
Sizing from money you cannot afford to lose, or borrowed money.
Setting the stop by how much you want to lose instead of by price structure.

If you want suggested entries, targets and stops, Crypffalo Trade Copilot sends LONG setups with price levels on Telegram. You still apply the sizing formula above to fit your own capital.

FAQ

Do small accounts need position sizing?

Yes. Small accounts are the easiest to wipe out with a few large trades. Sizing at 1–2% gives you enough trades to learn.

My stop is close, so the size gets very large. Is that a problem?

Tight stops get hit by noise. Place the stop from the chart and accept a smaller size, instead of pulling the stop closer to trade bigger.

Is 1% always right?

It is a safe starting point. With a stable track record some traders move to 1.5–2%, rarely higher.

For information only, not financial advice.

Tags: Risk management, Position size, Stop loss, Risk-reward, Futures, Beginners

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