Trading
Risk management, position sizing, growth and edge math for active traders.
Crypto
Crypto-specific tools — fees, exchanges, sizing.
Forex
Pip math and forex-specific sizing.
Journal & Analytics
Log trades, track performance, calculate edge metrics.
Options
Option P&L, break-evens, payoff diagrams.
Position Sizing
How much to put on each trade. The single biggest lever in trading.
Position Size Calculator
How many shares, units or lots to buy given your account size and risk tolerance.
Average Down / DCA Calculator
Blend multiple buys at different prices into a single average cost basis.
Margin & Leverage Calculator
Required margin, capital used, and liquidation distance for any leveraged position.
Kelly Criterion Calculator
The mathematically optimal position size based on your win rate and win/loss ratio.
Returns & Growth
Project where consistent returns compound to over time.
Risk Management
R:R, drawdown recovery, and the math that keeps you in the game.
Drawdown Recovery Calculator
See exactly how much gain you need to recover from a drawdown. The asymmetry is brutal.
Risk / Reward Calculator
Compute R:R ratio, break-even win rate, and expected value for any trade setup.
Sharpe Ratio Calculator
Measure your strategy's risk-adjusted return — the universal trader benchmark.
Free trading calculators that run in your browser
Every tool on this page is a calculator. You type in an account size, an entry, a stop or a fee rate and get back the number you were about to work out on an envelope. Nothing is uploaded and there is no account to create.
Risk management
Risk management is the arithmetic that keeps an account alive. The risk/reward calculator gives a setup's ratio, break-even win rate and expected value. The drawdown recovery calculator shows the gain a given loss needs to get back to flat, always more than the loss itself. The Sharpe ratio calculator turns return and volatility into one risk-adjusted figure.
Position sizing
Size is the decision that matters most, so position sizing has the most tools. The position size calculator takes account size, risk per trade and stop distance and returns a share or unit count. The Kelly criterion calculator works from win rate and payoff ratio instead, with half and quarter Kelly. The margin and liquidation distance calculator shows how far price can move against a margined position before the exchange closes it. The average down calculator blends several buys into one cost basis and break-even.
Returns and growth
Returns and growth checks a trade after the fact and projects the account forward. The profit and loss calculator nets out a long or short trade with fees on both entry and exit. The trading compound calculator compounds a steady monthly return over years, with optional withdrawals.
Forex
Currency pairs are quoted in pips and sized in lots, so forex has its own two tools. The pip value calculator gives the worth of one pip in your account currency for a pair and lot size, yen pairs included. The forex position size calculator turns a stop in pips into units and standard, mini and micro lots.
Options
The two options tools answer different questions. The options profit calculator draws the payoff at expiry for a long or short call or put, with max profit, max loss and break-even. The Black-Scholes calculator prices a European option and returns the Greeks alongside.
Crypto
Exchange fees are the quiet cost of crypto trading. The crypto exchange fee comparator puts the published maker and taker rates of the major spot exchanges side by side and prices them against your own volume.
Journal and analytics
The trading journal logs each trade, with a note on how you felt, and works out win rate, expectancy and profit factor. Trades stay in your browser's local storage and export as CSV. It has journal and analytics to itself.
Which tool do I need?
- You know your stop and want a share count: the position size calculator.
- You want to know if a setup is worth taking: the risk/reward calculator.
- You are down and want the gain that gets you back: the drawdown recovery calculator.
- You want to know if your edge is real: the trading journal, then the Sharpe ratio calculator.
What these tools do and do not do
Each calculator does arithmetic on the numbers you give it. It has no market data feed, no opinion on direction, and no idea whether your stop is in a sensible place. Black-Scholes assumes constant volatility and no early exercise, so it explains a quote better than it predicts one. None of this is investment advice. It is the math you would do anyway, done without the typos.