TradeRiskMath

Trading Risk · Portfolio · Calendar · Education

Make Every Financial Decision With a Plan.

The Numbers Behind Smarter Market Decisions.

Calculate trading risk. Track your portfolio. Stay ahead of market events. Organize your money.

TradeRiskMath brings practical trading calculators, portfolio tools, market calendars, and financial education together in one place — built for traders and investors who want to plan every decision with clear, honest math instead of guesswork.

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Practical financial tools. Clear calculations. Educational resources.

Position Size Calculator

Multi-Asset · Options

Illustrative
Account Equity
$25,000
Risk per Trade
2%
Entry Price
$3.20
Premium Stop
25%

Results

  • Max Dollar Risk$500
  • Risk per Contract$80
  • Position Size6 contracts
  • Total Outlay$1,920
  • Risk : Reward1 : 2

Illustrative example using deterministic sizing math. Real inputs update instantly in the live tool below.

What You Can Do

Everything You Need to Plan With Confidence

Four connected toolsets — trading risk, market events, portfolio management, and personal finance — built to help you make more informed decisions.

  • Manage Your Trading Risk

    Calculate position sizes, evaluate risk-to-reward, and understand potential losses before entering a trade.

    Explore Trading Tools

  • Stay Ahead of Market Events

    Keep important earnings announcements, dividend dates, economic releases, and your own scheduled activities organized in one calendar.

    Explore the Calendar

  • Understand Your Portfolio

    Organize holdings, review portfolio performance, and monitor relevant investment information using the tools available on TradeRiskMath.

    Explore Portfolio Tools

  • Take Control of Your Money

    Explore available tools and educational resources for budgeting, cash flow, financial organization, and long-term planning.

    Explore Personal Finance

See It In Action

Tools That Turn Financial Questions Into Clearer Answers

The calculators below run entirely in your browser — no account required. Enter your numbers and the math updates instantly.

TradeRiskMath Calculators

Every calculator in one place. Pick a tool below — position sizing, expectancy, dividend income, emergency fund, or budget — and the matching inputs, outputs, and recent calculations appear instantly. All math runs 100% in your browser.

100% client-side

Options, stocks, futures & forex sizing

Multi-Asset Risk Calculator

100% client-side

Size option contracts from premium-based stop distance. Each contract controls 100 shares.

Options Calculator

Risk Model

Single Option — Quick Size

Option & Stop

Stop Loss %

Target & Geometry

Target Risk-to-Reward Ratio
Projected Target$4.80
Target Gain+50.0%
Stop Exit$2.56
Multiplier fixed at 100 shares/contract

Live Execution Dashboard

1:2.50

Core Position Sizing

Max Recommended Contracts

7

$64.00 risk each

Total Capital Outlay

$2,240.00

9.0% of account

Total Dollar Risk at Stop

-$448.00

20% stop · $2.56 exit

Trade Geometry & Targets

Target Contract Exit Price

$4.80

+50.0% from entry

Total Potential Profit at Target

+$1,120.00

$160.00 / contract

Net R:R Ratio

1 : 2.50

risk : reward

Required Break-Even Win Rate

28.6%

1 / (1 + R:R)

Implied Volatility (IV)

45%

Annualized · sizing context

Risk -$448.00Reward +$1,120.00

Payoff Diagram

P/L at expiration
Options strategy payoff diagram at expirationPayoff diagram at expiration for 7 contracts of the selected strategy. Break-even underlying price: $3.20. Planned stop loss: -$448 reached near $2.56. Planned take profit: +$1,120 reached near $4.80. Current underlying price: $3.20.-$448+$0+$1,120$2.05$2.56$3.20$4.80$5.76Option premium at exitProfit / Loss
Break-even
$3.20
Stop Loss
-$448
Take Profit
+$1,120
Contracts
7

Payoff diagram at expiration for 7 contracts of the selected strategy. Break-even underlying price: $3.20. Planned stop loss: -$448 reached near $2.56. Planned take profit: +$1,120 reached near $4.80. Current underlying price: $3.20.

No recent calculations. Enter your trade parameters above to start logging your session history.

Want strike-level break-even and a full payoff chart? Choose Long Call or Long Put in the strategy picker above. Spreads, covered calls and cash-secured puts are there too.

Why TradeRiskMath

Built to Help You Make More Informed Decisions

  • Plan Before You Act

    Understand potential risk, position sizing, and financial scenarios before making a decision.

  • Keep Important Information Organized

    Bring relevant portfolio information, market events, and personal financial activities into a more organized workflow.

  • Learn the Reasoning Behind the Numbers

    Access educational material that explains financial concepts, formulas, assumptions, and practical examples.

  • Build More Consistent Habits

    Use planning tools and tracking features to support more disciplined financial decision-making.

Knowledge Base

Learn the Concept. Apply It With the Right Tool.

Understand the reasoning behind the numbers, then use the matching calculator to put it into practice. Browse the full library on the TradeRiskMath Knowledge Base.

Browse the Knowledge Base

Frequently Asked Questions

  • Is TradeRiskMath free to use?

    Yes. Every calculator — the multi-asset position sizer, the expectancy tool, and the personal-finance calculators — is free and runs entirely in your browser. There is no account, no login, and no data sent to a server for the public calculators.

  • Which asset classes does the position sizer support?

    The Multi-Asset Risk Calculator sizes positions for Options, Stocks, Futures, and Forex from the same risk-first inputs: account equity, risk tolerance %, entry price, stop loss price, and target price. Each asset class applies its own contract multiplier, lot size, and leverage guardrail so the math stays accurate to that market.

  • What is the difference between the Multi-Asset Calculator and the Advanced Options Calculator?

    The Multi-Asset Calculator gives you instant position sizing and R:R across all four asset classes. The Advanced Options Calculator goes deeper on options specifically — modeling six strategies with strikes, premiums, payoff diagrams, and a seven-scenario P&L table. Use the multi-asset tool for fast sizing across markets; open the Advanced Options Tools for full payoff analysis on a specific option strategy.

  • What is the Expectancy Calculator for?

    The Expectancy Calculator evaluates the mathematical edge of a trading system from its win rate, average win, and average loss. It reports per-trade expectancy, profit factor, average R:R, and the break-even win rate your system must exceed to be profitable — so you know whether your strategy makes money over a large enough sample.

  • Does the calculator store my trades or account balance?

    No. The only history kept is a short, browser-only recent-calculations list stored in your device’s localStorage. It never leaves your browser and can be cleared at any time.

  • Does TradeRiskMath provide financial advice or trade recommendations?

    No. TradeRiskMath is an educational risk-modeling tool. It performs math on the values you enter; it does not recommend, endorse, or guarantee any trade, strategy, or security. Trading involves risk of loss and is not suitable for all investors. See our full Disclaimer.

  • Why is there no Estimated Win Rate or Expected Value in the Advanced Calculator?

    A real expected-value calculation requires a defensible probability estimate for the underlying reaching a target, which depends on assumptions the tool cannot validate. Showing a fabricated probability would be misleading, so the Advanced Calculator intentionally reports only the deterministic geometry of a trade — break-even, max loss, max profit, R:R, and P&L scenarios — not a speculative EV. The separate Expectancy Calculator evaluates system edge from your own historical win rate and average win/loss instead.

More walkthroughs and the metric glossary live in the Help Center.

Start With a Better Plan.

Explore the tools and resources available on TradeRiskMath and find a practical next step for your trading, investing, or financial organization.

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What the calculators do

  • Compute position size from account equity × risk % ÷ per-unit risk across four asset classes.
  • Project break-even, max loss, max profit, and R:R from the values you enter.
  • Render payoff diagrams and seven-scenario P&L tables at expiration (options).
  • Evaluate system expectancy, profit factor, and break-even win rate from your own stats.

What the calculators do not do

  • They do not predict whether a trade will be profitable or estimate win probability.
  • They do not account for commissions, fees, slippage, or bid-ask spread.
  • They do not provide quotes, execute orders, or connect to a brokerage.
  • They intentionally exclude Estimated Win Rate and Expected Value (EV) from the Advanced Calculator.

TradeRiskMath is an educational risk-modeling tool, not financial advice. Trading involves risk of loss and is not suitable for all investors. See our full Disclaimer and Terms.