Quick answer: Position size is the amount at risk divided by the distance between entry and stop loss. Enter your account size, risk percent, entry and stop loss in the calculator below and it shows the exact quantity to trade, the position value, whether leverage is needed and your risk to reward ratio. Everything runs in your browser and nothing is stored.
Crypto position size calculator
This tool computes position size from your own risk inputs. It is not trading or investment advice. Crypto prices are highly volatile, stop loss orders can fill at worse prices than set (slippage), and leveraged positions can be liquidated. Never risk money you cannot afford to lose.
TLDR: With a $10,000 account risking 1 percent, you can lose at most $100 on the trade. If your entry is $60,000 and your stop is $58,800, the risk per coin is $1,200, so the position is $100 divided by $1,200, which is 0.0833 BTC worth $5,000. The formula sizes every trade so a stopped-out loss always equals the same small fraction of your account.
Table of contents
The position size formula
Three numbers decide the size of every trade: how much of your account you are willing to lose, where you enter, and where your stop loss sits. The formula is position size equals risk amount divided by the distance between entry and stop. Nothing about the coin, the timeframe or your conviction changes it. A tighter stop allows a larger position for the same risk, and a wider stop forces a smaller one.
This is the reverse of how most losing traders operate. They pick a position size first, often the maximum the exchange allows, and then discover what the loss is when the stop hits. Sizing from risk means the loss is decided before the trade is placed.
Worked examples
All rows use an entry of $60,000 on BTC. Watch how the position responds to each input.
| Account | Risk per trade | Stop distance | Position size | Position value |
|---|---|---|---|---|
| $1,000 | 1 percent ($10) | $1,200 | 0.0083 BTC | $500 |
| $10,000 | 1 percent ($100) | $1,200 | 0.0833 BTC | $5,000 |
| $10,000 | 2 percent ($200) | $1,200 | 0.1667 BTC | $10,000 |
| $10,000 | 1 percent ($100) | $3,000 | 0.0333 BTC | $2,000 |
The last two rows show the two levers separately. Doubling the risk percent doubles the position. Widening the stop from $1,200 to $3,000 shrinks the position, because each coin now carries more risk. The calculator does exactly this arithmetic live.
Where leverage fits in
Leverage does not change your risk when you size from the stop loss. It only determines whether the position value fits inside your account balance. In the examples above, a $5,000 position in a $10,000 account needs no leverage at all. If the formula produced a $25,000 position, you would need 2.5x leverage to open it, but the amount lost at the stop would still be $100. The calculator shows the leverage needed as a separate line so you can see this distinction directly.
The real dangers of leverage are liquidation and slippage. A leveraged position can be force-closed before your stop if the account margin runs out, and in fast crypto moves stop orders can fill at worse prices than set. Both mean the actual loss can exceed the planned risk amount, which is a strong argument for keeping both the risk percent and the leverage low.
Common questions
What risk percent should I use?
There is no universal number, but the widely repeated range in risk management writing is between 0.5 and 2 percent per trade. The reasoning is survival arithmetic: at 1 percent risk, a streak of ten straight losses costs roughly 10 percent of the account, which is recoverable. At 10 percent risk, the same streak is close to fatal.
Does this work for short positions?
Yes. Place the stop loss above the entry and the calculator switches to short automatically. The formula is identical because it only uses the distance between the two prices.
Does it work for coins other than Bitcoin?
Yes, for any pair. The inputs are just prices, so it works for ethereum, small caps or any market where you can set an entry and a stop, including stocks and forex. For very low priced coins the quantity will simply be a large number of units.
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