Share Calculator

Calculate profit and loss for stock trades with precision. Includes commission costs, percentage returns, and break-even analysis for both long and short positions.

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Position Info

Position Type:Long
Shares:-
Entry Price:$-
Target Price:$-

Commission Guide

Many brokers now offer $0 commission stock trades
Options trades typically have per-contract fees
International stocks may have additional fees
Include SEC fees and other regulatory costs

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Long vs Short Positions

Long Position: Buy low, sell high. Profit when stock price increases.
Short Position: Sell high, buy low. Profit when stock price decreases.
Short selling involves borrowing shares and has unlimited loss potential.

Commission Impact

Commissions directly reduce your net profit and increase your break-even price.
Example: $5 commission on 100 shares = $0.05 per share cost.
Always factor in all trading costs for accurate P/L calculations.

Risk Management

Never risk more than you can afford to lose on any single trade.
Stop Loss: Set exit points to limit losses before entering trades.
Position Size: Calculate appropriate share quantities based on account size.
Diversification and proper position sizing are key to long-term success.

Popular Trading Strategies

Common approaches to stock trading and their profit/loss characteristics

Day Trading

Buy and sell stocks within the same trading day to profit from short-term price movements.

Advantages:
  • • No overnight risk
  • • Quick profits possible
  • • High liquidity focus
Risks:
  • • High stress levels
  • • Requires full attention
  • • Pattern day trader rules

Swing Trading

Hold positions for several days to weeks, capturing medium-term price swings.

Advantages:
  • • Less time intensive
  • • Larger profit potential
  • • Technical analysis focus
Risks:
  • • Overnight/weekend gaps
  • • Longer drawdown periods
  • • Market timing required

Value Investing

Buy undervalued stocks and hold long-term for fundamental appreciation.

Advantages:
  • • Lower stress approach
  • • Tax advantages
  • • Compound growth
Considerations:
  • • Requires patience
  • • Fundamental analysis
  • • Longer capital tie-up

Growth Investing

Invest in companies with strong growth potential, often at premium valuations.

Advantages:
  • • High return potential
  • • Innovation focus
  • • Market leadership
Risks:
  • • Higher volatility
  • • Valuation risk
  • • Growth disappointment

Frequently Asked Questions

Common questions about stock trading and profit/loss calculations

Q
How do I calculate profit/loss on stock trades?

For long positions: Profit/Loss = (Sell Price - Buy Price) × Number of Shares - Total Commissions. For short positions: Profit/Loss = (Short Sell Price - Cover Price) × Number of Shares - Total Commissions.

Example Long Trade:

Buy 100 shares at $50, sell at $55 = ($55 - $50) × 100 = $500 gross profit

Q
What's the difference between long and short positions?

Long positions profit when stock prices rise - you buy first, then sell. Short positions profit when prices fall - you sell borrowed shares first, then buy them back later at a lower price.

Long Position:

• Buy → Hold → Sell

• Profit when price rises

• Limited loss (maximum 100%)

Short Position:

• Borrow & Sell → Buy Back → Return

• Profit when price falls

• Unlimited loss potential

Short selling requires margin approval and carries higher risk due to unlimited loss potential.

Q
Do most brokers still charge trading commissions?

Many major brokers now offer commission-free stock trading, but other fees may still apply depending on the trade type and broker.

Free: Most stock trades at major brokers (TD Ameritrade, E*TRADE, Schwab, Fidelity)

Fees May Apply:

• Options: $0.50-$0.65 per contract

• International stocks: $5-$25 per trade

• OTC/Pink Sheet stocks: $5-$7 per trade

• SEC regulatory fees: ~$0.008 per $1,000 sold

Always check your broker's current fee schedule as policies change frequently.

Q
How do I calculate my break-even price?

Your break-even price accounts for all trading costs. For long positions, add total commissions to your buy price. For short positions, subtract total commissions from your short sell price.

Long Break-even:

Buy Price + (Total Commissions ÷ Shares)

Example: $50 + ($10 ÷ 100) = $50.10

Short Break-even:

Short Price - (Total Commissions ÷ Shares)

Example: $50 - ($10 ÷ 100) = $49.90

The stock must move beyond your break-even price for the trade to be profitable.

Q
What's a good percentage return on stock trades?

Returns vary greatly depending on your trading strategy, time horizon, and risk tolerance. Here are some general benchmarks:

Annual Benchmarks:

• S&P 500 historical average: ~10% per year

• Conservative target: 6-8% per year

• Aggressive target: 12-15% per year

Day/Swing Trading:

• Small wins: 0.5-2% per trade

• Medium wins: 2-5% per trade

• Large wins: 5%+ per trade

Focus on consistent, risk-managed returns rather than chasing high-percentage gains.

Q
How much should I risk per trade?

Most professional traders recommend risking no more than 1-2% of your total account value on any single trade to preserve capital long-term.

Risk Management Examples:

• $10,000 account: Risk $100-200 per trade max

• $50,000 account: Risk $500-1,000 per trade max

• $100,000 account: Risk $1,000-2,000 per trade max

Position sizing formula:

Shares = Risk Amount ÷ (Entry Price - Stop Loss Price)

This approach helps you survive losing streaks and compound gains over time.

Q
Are there tax implications for stock trading?

Yes, stock trading profits are subject to capital gains taxes, with different rates depending on how long you hold the position.

Long-term (1+ year):

• 0%, 15%, or 20% tax rate

• Based on income level

• More tax-efficient

Short-term (<1 year):

• Taxed as ordinary income

• 10%-37% tax rate

• Higher tax burden

Consult a tax professional for advice specific to your situation and jurisdiction.

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