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Position Math

Free trading calculators, no signup

Position size, liquidation, recovery, prop rules. Run the numbers.

What gain reverses a 20% loss? What leverage gets you liquidated? Type the numbers in, get the answer. Free, in your browser, no signup.

No signupRuns locallyNo broker connection
Manual example · not live pricesPosition sizing
Open full calculator
Estimated units89.29 units
Notional value (not margin)$16,642.86

units = (account × risk percent / 100) / |entry − stop|

For a USD account and USD prices per share/unit. Defaults are examples, not quotes. Excludes contract multipliers, FX, fees and slippage. Units are approximate; round down to the supported order increment.

★ Top tools

Funded-account checks

Use these three pages as a simple path: understand the rules, stress a scenario, then track consistency before a payout.

Four questions behind the calculator.

Every result exposes its assumptions, so the number can be checked instead of merely accepted.

01

How do you calculate position size from account risk?

For USD-priced shares or units without a contract multiplier, divide the USD risk budget by the per-unit stop distance. A $25,000 account, 1% risk and $2.80 distance gives about 89.29 units. Round order size down to the permitted increment; fees and slippage are excluded.

02

How much should a trader risk per trade?

There is no universal percentage. The useful question is whether the chosen loss still leaves enough room for normal losing streaks, open portfolio risk and any daily or trailing drawdown limit.

03

Why can a profitable strategy still hit a dangerous drawdown?

Win rate and average payoff do not determine the order of wins and losses. Monte Carlo simulation rearranges that sequence across many paths, showing a range of drawdowns instead of one unusually smooth backtest.

04

How do prop-firm rules change position sizing?

A funded account can have a tighter effective loss budget than its headline size suggests. Daily loss limits, trailing floors and consistency rules all reduce the usable buffer.

Prop firm

Pairs trading

Trading

Loss Recovery / Break-Even Calculator

The loss recovery calculator takes your drawdown and returns the exact gain needed to get back to break-even — the climb out is always steeper than the fall in.

Average Down / Cost Basis Calculator

The average down calculator blends every purchase — share counts, prices and fees — into a single weighted cost basis and the price your whole position breaks even at.

Target Break-Even Calculator

The target break-even calculator answers a blunt question: how many more shares it takes to drag your break-even down to a price you choose, and how much bigger your position gets to reach it.

Position Size Calculator

Estimate shares or units from a USD risk budget and USD entry/stop prices per unit.

Risk/Reward Ratio Calculator

The risk-reward calculator turns entry, stop and target into your R multiple, then the minimum win rate that ratio needs just to break even — a 2:1 trade breaks even near a 33% win rate.

Stop-Loss & Take-Profit Calculator

The stop-loss and take-profit calculator converts the percentages in your head into exact price levels for long or short trades, with the dollar risk and reward waiting at each level.

DCA (Dollar-Cost Average) Calculator

The DCA calculator takes each fixed contribution and the price it bought at, then returns the units you accumulated and your blended dollar-cost-average cost across the whole plan.

Break-Even After Fees Calculator

The break-even after fees calculator folds your buy-side and sell-side costs into one number: the exit price where proceeds finally cover everything you paid to get in and out.

Expectancy Calculator

The expectancy calculator turns your measured win rate and average win/loss into per-trade expectancy, profit factor and the break-even win rate your payoff has to clear.

Losing Streak Calculator

The losing streak calculator estimates how often a run of consecutive losses shows up across a sample of trades — the streaks that arrive even when the long-run win rate looks reasonable.

Portfolio Heat Calculator

The portfolio heat calculator adds up the stop-risk across every open position, then shows both naive total heat and a correlation-adjusted estimate of your real combined exposure.

Monte Carlo Equity Curve Simulator

The Monte Carlo simulator stress-tests one set of assumptions by dealing the same win rate, payoff ratio and fixed-fractional risk into thousands of possible equity paths — so you see the range of outcomes, not one lucky backtest.

CSV Trade Journal Analyzer

The trade journal analyzer reads a CSV export from your broker or journal and returns your core stats — win rate, net P&L, profit factor, expectancy, streaks and max drawdown — plus an equity curve, entirely inside your browser.

Investing

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Information and education only, not investment, trading, tax or financial advice. Manual calculations run in your browser without a broker connection. Fees, slippage and gaps can make losses exceed the estimate. Shared URLs contain selected inputs; optional email registration is saved separately. See the privacy details.

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