Position Size Calculator
Risk-based sizing: base quantity from risk budget and stop distance. Leverage sets margin only.
Calculate
Results
From estimate to a live bot scenario
Carry the same logic into Veles: set comparable parameters, preview the order grid, then backtest before you launch.
- Match direction, leverage, grid, Martingale, and TP/SL
- Inspect orders, capital allocation, and average entry
- Stress-test fees, drawdown, and MAE in a backtest
Assumptions & conventions
- Linear instrument; loss at stop ≈ |entry − stop| × size (+ optional total round-trip fees in per-unit risk).
- Long stop must be below entry; short stop must be above entry.
- Risk percent of account: enter 1 for 1%.
- Leverage does not scale quantity — it only affects required margin.
Frequently asked questions
How do you calculate crypto position size from risk percent?
Choose how much account equity you are willing to lose if the stop hits (risk percent × balance). Position size is then sized so that the loss from entry to stop — including round-trip fee drag — stays near that risk budget.
Direction matters: stops must sit on the correct side of entry for long vs short.
Why include fees in position sizing?
Fees reduce the effective distance you can “spend” before hitting the risk budget. Ignoring them systematically oversizes positions.
Enter the total round-trip fee rate as a human percent (0.08 for 0.08%). Per-unit drag uses (rate / 2) × (entry + stop).
Does leverage change the recommended position size?
This tool sizes base quantity primarily from risk and stop distance. Leverage still matters operationally because exchanges require initial margin ≈ notional ÷ leverage and may reject oversized notionals.
After sizing, check liquidation and margin headroom on your venue.
What risk percent should I use?
Many discretionary traders risk about 0.5%–1% of equity per idea; systematic or high-frequency styles may use less. There is no universal correct number.
Pick a percent you can survive across a streak of losers, then let the calculator translate that into quantity.
Position size vs notional — which number do I order?
Position size is in base asset units (for example BTC). Notional is the quote-currency exposure at entry (price × size).
Most crypto UIs accept either base quantity or quote notional — convert carefully and re-check after leverage is applied.
Is this the same as a forex lot-size calculator?
The risk logic is related, but crypto linear perpetuals use base-asset quantity and venue-specific fee/margin rules instead of forex lots and pip values.
Always validate stop distance and contract specs for the symbol you trade.
Related calculators
Risk/Reward Calculator
Fee-free risk/reward ratio and break-even win rate from entry, SL, and TP.
Stop & Take Profit Calculator
PnL at stop and take profit levels with optional risk/reward.
Liquidation Price Calculator
Estimate isolated liquidation for USDT-margined linear perpetuals with generic, Binance, or Bybit formula presets.