TOOLKIT · NO SIGNUP REQUIRED
Crypto position size calculator — free tool
Enter your balance, risk %, entry and stop loss to instantly get position size, MT5 lot size, the R:R ratio and estimated liquidation price. Works for crypto futures, forex and indices. Free, no signup.
Position Size Calculator
Crypto · Forex · Indices · instant calculations
Inputs
Result · calculation receipt
Max risk
$100.00
= $10,000 × 1%
Position size
0.050000 units
= $100.00 ÷ $2,000.00
Position value
$4,750
Margin required
$475
at 10x
Stop-loss distance
$2,000.00
2.11% from entry
MT5 lot size
0.0500 units
1 unit = 1 base coin
Estimated liquidation price
$85,500
Simplified estimate · 0.5% MMR · each exchange has its own margin tiers
R:R ratio
1 : 3.00
Good R:R
Expected profit
$300
if take profit is hit
Stop loss is above the liquidation price — the trade exits before liquidation.
What this tool does
This tool answers a single question: given your balance and chosen risk, what is the maximum position size? Enter your account balance, risk % per trade, entry price, stop loss and (optionally) take profit — the tool instantly computes the amount at risk, position size in coins/units, MT5 lot size, margin required at your chosen leverage, estimated liquidation price and the R:R ratio. Every result updates instantly as you edit any input.
It works across three market groups: crypto (BTC and perpetual pairs), forex (e.g. EUR/USD) and indices/metals (e.g. NAS100). This is pre-trade preparation that locks in your risk instead of guessing by feel.
How to use
Enter your account balance
Total capital in your trading account (USD) — total equity, not just the portion you plan to use for this trade.
Set your risk %
Professional traders risk at most 1–2% per trade. Drag the slider or type it directly — the risk-level label updates itself.
Enter entry, stop loss, take profit
Planned entry price, stop loss (required), take profit (optional — unlocks the R:R ratio and expected profit).
Read the results
See max position size, margin required, MT5 lot size, estimated liquidation price and the R:R ratio. Edit any field to update instantly.
The formula (in words)
Risk ($) = Balance × Risk %
Stop distance = |Entry − Stop loss|
Position size (units) = Risk ($) ÷ Stop distance
Position value ($) = Position size × Entry
Margin required = Position value ÷ Leverage
Lot size (forex) = Position size ÷ 100,000
Liquidation price (long) ≈ Entry × (1 − 1/Leverage)
Liquidation price (short) ≈ Entry × (1 + 1/Leverage)
R:R ratio = Take-profit distance ÷ Stop-loss distance. The liquidation formula above is a simplified version (it ignores each exchange's detailed maintenance margin tiers).
Worked example (assumptions stated)
Example: long BTC 10x, 2% risk
Assumptions
- Balance
- $1,000
- Risk
- 2%
- Entry
- $77,220
- Stop loss
- $75,680
- Take profit
- $81,000
- Leverage
- 10x
Result
- Risk $
- $20.00
- Stop distance
- $1,540
- Position size
- 0.012987 BTC
- Position value
- $1,002.86
- Margin required
- $100.29
- Liquidation ≈
- $69,498
- R:R ratio
- 1 : 2.45
- Expected profit
- $490.91
Results are rounded; the figures shown in the tool after clicking “Try example” are the full version.
Limits
- Position size uses the fixed-percentage risk method — it ignores fees, slippage and compounding.
- The liquidation price is a simplified estimate assuming 0.5% MMR; every exchange has its own maintenance margin tiers, so the real figure can differ.
- The tool assumes isolated margin; with cross margin, liquidation depends on your entire account balance.
- MT5 lot size assumes 1 lot = 1 BTC; other brokers may define it differently.
Frequently asked questions
How do I calculate position size for crypto futures?
Formula: Position size = (Balance × Risk %) ÷ Stop-loss distance. Example: $10,000 balance, 1% risk, BTC entry $95,000, stop $93,000. Risk $ = $100. Stop distance = $2,000. Position size = $100 ÷ $2,000 = 0.05 BTC. At $95,000/BTC, that is a $4,750 position needing $475 margin at 10x leverage.
What is the 1% rule in trading?
The 1% rule means never risking more than 1% of your total account on a single trade. On a $10,000 account the maximum risk per trade is $100. Even a streak of 20 losses only costs 20% of your capital — enough to stay in the game until your edge plays out. Most successful traders operate between 0.5% and 2% risk per trade.
What is a good R:R ratio for crypto?
A minimum of 1:2 is considered standard — risking $1 to make $2. At 1:2 you only need to win 34% of trades to break even (after fees). Many professional traders target 1:3 or higher on swing trades. Scalpers sometimes use 1:1.5 with very high win rates. Never take a trade below 1:1.
Which lot size should I use in MT5 for Bitcoin?
In MetaTrader 5 the Bitcoin lot size depends on your broker's contract specification. Most brokers define 1 lot = 1 BTC. So if the tool outputs 0.05 BTC you enter 0.05 lots in MT5. Always check your broker's lot specification in contract specifications before placing the order.
Why does the liquidation price matter?
The liquidation price is the level at which your position is force-closed and you lose the entire margin. If price reaches liquidation before your stop, the exchange closes you out — not your stop order. Always set your stop so the trade exits before forced liquidation.
Related reading
Lowest-fee exchange
The lowest published fee structure among the exchanges Ron tested — with a dated check.
Contains affiliate links; I may earn a commission at no extra cost to you. Scores are not affected. Read the disclosure
Best for: Lowest futures fees (0% maker)
Pros
- 0% maker and 0.01% taker on futures
- Easiest VIP 1 threshold ($10K/month)
- Wide altcoin coverage
Cons
- Thinner liquidity than Bybit/Binance
- No options trading
- Slower customer support
Fee checked 21/09/2026
Open MEXC accountRisk note
Trading crypto derivatives with leverage carries a high risk of losing your capital. Nothing on this page is financial advice. Fee, leverage and feature figures change — always confirm current terms with the exchange before you trade.