Position size, profit/loss and stop-loss calculators — work out exactly how much to buy, what you'll make, and where to place your stop. Everything runs privately in your browser.
Free calculators get you started — these books and tools build the discipline and market understanding that keep you consistent.
The world's most popular charting platform, with screeners, real-time alerts and a community of millions of traders.
Mark Douglas's classic on the mental edge — why discipline and consistency, not prediction, separate profitable traders from the rest.
A timeless collection of parables on saving, growing and protecting wealth — the foundation every investor builds on.
Burton Malkiel's guide to rational investing — the case for index funds and against trying to beat the market.
Affiliate disclosure: As an Amazon Associate, TradeSizer earns from qualifying purchases. We may also earn a commission on the other links — at no additional cost to you. This never affects our calculators, which remain free and objective.
The idea is simple and it stays the same across every market. Risk a fixed amount, measure your stop, then let the math decide the size.
Most traders keep it to 1% or less of the account on one trade. On a $10,000 account, 1% is $100.
Find the gap between your entry and the price where the trade is wrong — per share, per pip or per contract.
Divide the money you'll risk by the risk on one unit. That number is the exact size to buy.
A good trade can be ruined by a size that's too big. Position sizing is the one variable fully in your control.
Drawdowns are asymmetric. Losing 50% of an account requires a 100% gain just to break even. Keeping each loss small prevents holes you can't climb out of.
Losing streaks are normal. Even a strategy that wins half the time can lose six trades in a row. At 1% risk per trade, that streak costs roughly 6% — painful, but survivable.
Don't widen the stop to fit a size. Decide the stop based on the chart first, then size the position. The order matters — the stop is never a consequence of how much you want to buy.
Consistency beats one big win. Traders who size every trade by the same rule remove emotion, and emotion is what turns small losses into account-ending ones.
Position sizing determines how many shares, lots or contracts to buy so that a single losing trade risks only a small, fixed percentage of your account. It is the main tool for surviving a string of losses.
Most professional traders risk between 0.5% and 2% per trade. Risking more than 2% can produce severe drawdowns after a few consecutive losses.
A pip is the smallest standard price move, usually 0.0001 for major pairs and 0.01 for yen pairs. A standard lot is 100,000 units, a mini lot is 10,000 and a micro lot is 1,000.
Yes. Choose Shares / Crypto and enter the entry and stop-loss prices. It returns the exact number of coins, including fractional amounts.
No. All calculations run in your browser. Your balance and trade details are never sent to or stored on a server.
TradeSizer publishes free, browser-based calculators that help traders manage risk the same way on every trade — no sign-up and no personal data stored.
Our mission. Most blown accounts fail because of position size, not strategy. We build the simple tools that keep one losing trade from becoming a disaster.
How the tools work. Every calculation runs entirely in your browser with standard risk formulas. Your balance, entries and stops never leave your device.
Last updated: 2026. This site is built to collect as little data as possible.
1. No personal data. The calculators run locally in your browser. We do not see, collect or store your account balance or trades.
2. Cookies and advertising. We use Google AdSense, which uses cookies to serve ads based on your prior visits to this and other websites.
3. Third-party vendors. Third-party vendors, including Google, use cookies to serve ads. You can opt out of personalized advertising in Google Ads Settings.
4. Questions. For any privacy question, use the contact details below.
Questions, feedback or a tool you'd like to see? Send an email and we'll reply.