Trading Calculator Tools
Every calculator a prop firm trader needs. Position size, drawdown, risk/reward, futures tick value, lot size, pip value, and more. Pre-loaded with rules from 20+ firms. All free. No account required.
Risk
Position Size Calculator
Calculate max position size based on account balance, risk percentage, and stop loss distance. Pre-loaded with prop firm daily loss limits.
Drawdown Calculator
Model drawdown scenarios. See how many consecutive losses it takes to breach your account at different risk levels.
Trailing Drawdown Simulator
Visualize static vs trailing EOD vs trailing intraday drawdown on your actual trade sequence. The most misunderstood rule in prop trading.
Risk/Reward Calculator
Calculate R:R ratios, required win rate for profitability, and expected value per trade. Kelly criterion and expectancy included.
Leverage Calculator
Calculate effective leverage, margin used, and free margin. See how leverage amplifies both gains and rule violations.
Forex
P&L
Rules
Firm-Specific Calculators
Need calculators pre-loaded with a specific firm's rules? The calculators hub has every tool above configured for FTMO, TopStep, Apex, and all 20+ firms.
Firm-specific calculatorsFrequently Asked Questions
Are all tools free?
Yes. Every calculator and tool on this page is free. No account required. No credit card. The tools use the same prop firm data that powers Vigil audits, so the rulesets and limits are always accurate.
What is the most important calculator for prop firm traders?
The position size calculator and drawdown calculator. Position sizing determines whether a losing trade stays within your daily loss limit. The drawdown calculator shows how many losses you can survive. Together they prevent the most common cause of account failure: oversizing.
How is the trailing drawdown simulator different from a regular drawdown calculator?
A regular drawdown calculator shows cumulative loss from starting balance. The trailing drawdown simulator shows how trailing rules (EOD or intraday) move the drawdown floor as your equity changes. This matters because a profitable trade sequence can actually reduce your buffer on trailing accounts -- something most traders do not realize until they breach.
Can I use these tools without a prop firm account?
Yes. The tools work for personal accounts, demo accounts, and any trading strategy. The prop firm presets are a convenience -- you can enter custom values for any field.