Position Size Calculator for Topstep
Topstep is a leader in the futures prop space. Futures trading uses contracts instead of lots, and Topstep has strict Daily Loss Limits. This calculator helps you size positions to respect these limits.
Futures contract sizing is distinct from forex lots. 1 contract of ES (S&P 500) moves $50 per point, whereas NQ (Nasdaq) moves $20 per point. Topstep's trailing drawdown (in some accounts) and hard Daily Loss Limit mean you calculate risk based on "ticks" rather than pips. A few ticks of slippage in futures can violate rules faster than in forex.
Important Notice
This tool is not affiliated with Topstep. Futures trading involves substantial risk. Verify current rules with Topstep.
Example Calculation
Step-by-step lot size calculation for TOPSTEP:
The Formula
Step 1: Your Trading Parameters
Instrument
E-mini S&P 500 (ES)
Account Size
$50,000 (combine)
Risk Per Trade
1%
Stop Loss
10 ticks
Step 2: Risk Amount
$500
Maximum loss per trade
Step 3: Lot Size
$500 ÷ (10 ticks × pip value)
2 contracts (ES)
Risk exactly $500 with 10 ticks SL
💡 Note: Lot size determines your risk, while leverage determines your margin requirement. With higher leverage (e.g., 1:100), you need less margin to open the same position, but your risk stays the same.
TOPSTEP Volatility: High - Futures markets move fast
Frequently Asked Questions
Common questions about TOPSTEP lot sizing.
This page is part of our main Lot Size Calculator, which supports all forex pairs, indices, and crypto.
Contract limits depend on your account size and step. A $50k Buying Power account typically starts with a max of 5 contracts, but your risk management (stop loss) should usually dictate a smaller size than the max allowed.