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Portfolio Gain/Loss Calculator

Calculate total profit or loss across multiple stock positions.

Use this deterministic portfolio gain/loss calculator to sum unrealized or realized P/L across multiple holdings.

Inputs

Results

Total portfolio P/L

+$550.00

Portfolio P/L is +$550.00 (+3.79%).

Total cost basis
$14,500.00
Total current value
$15,050.00
Total P/L
+$550.00
Portfolio return %
+3.79%

Formula

Portfolio P/L = Σ(Current Value - Cost Basis)

Example

  • Position 1 cost basis: 5000
  • Position 1 current value: 5600
  • Position 2 cost basis: 7000
  • Position 2 current value: 6650
  • Position 3 cost basis: 2500
  • Position 3 current value: 2800

What does this mean?

  • •Positive total means your portfolio is above total cost basis.
  • •Negative total means your portfolio is below cost basis.
  • •Use this before trimming or adding positions to keep allocation decisions data-driven.

Track total portfolio performance at a glance

Aggregate position-level P/L quickly before rebalancing decisions.

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What is a portfolio gain/loss?

Use this deterministic portfolio gain/loss calculator to sum unrealized or realized P/L across multiple holdings. In practice, this means you can quantify portfolio gain/loss using position 1 cost basis, position 1 current value, position 2 cost basis, position 2 current value, position 3 cost basis, and position 3 current value without relying on hidden assumptions or black-box scoring.

Primary input set for this calculator: Position 1 cost basis, Position 1 current value, Position 2 cost basis, Position 2 current value, Position 3 cost basis, Position 3 current value.

How to calculate portfolio gain/loss

  1. 1.Step 1: Enter position 1 cost basis with the timeframe/context you want to evaluate.
  2. 2.Step 2: Enter position 1 current value with the timeframe/context you want to evaluate.
  3. 3.Step 3: Enter position 2 cost basis with the timeframe/context you want to evaluate.
  4. 4.Step 4: Enter position 2 current value with the timeframe/context you want to evaluate.
  5. 5.Step 5: Enter position 3 cost basis with the timeframe/context you want to evaluate.
  6. 6.Step 6: Enter position 3 current value with the timeframe/context you want to evaluate.
  7. 7.Step 7: Apply formula Portfolio P/L = Σ(Current Value - Cost Basis).
  8. 8.Step 8: Interpret output together with risk, liquidity, and catalyst context.

Why this metric matters

This metric turns trade assumptions into explicit numbers for sizing, entry/exit planning, and portfolio discipline.

Pair this calculator with catalyst context from headlines, filings, and options flow to avoid relying on isolated numbers.

When to use this calculator

  • ✓Before opening a new position where portfolio gain/loss impacts sizing or risk.
  • ✓After a catalyst to quantify how much conditions changed versus your baseline.
  • ✓When comparing setups across multiple tickers with one consistent formula.
  • ✓During weekly review to keep decision-making tied to measurable inputs.

Common scenarios

Positive total means your portfolio is above total cost basis

Use this portfolio gain/loss workflow to quantify this scenario with deterministic inputs.

Negative total means your portfolio is below cost basis

Use this portfolio gain/loss workflow to quantify this scenario with deterministic inputs.

Use this before trimming or adding positions to keep allocation decisions data-driven

Use this portfolio gain/loss workflow to quantify this scenario with deterministic inputs.

Event reaction review

Recalculate portfolio gain/loss immediately after earnings, filings, or macro headlines.

Interpretation tips

  • •Re-run portfolio gain/loss whenever key inputs change materially, not only when price moves.
  • •Document assumptions so the same methodology can be repeated across watchlist names.
  • •Use this metric as one layer in the decision stack, not as a standalone trade trigger.

Data caveats

  • –Outputs are deterministic from your inputs; input quality determines output quality.
  • –This page does not auto-adjust for broker fees, taxes, or slippage unless you include them in your assumptions.
  • –Validate corporate action details, filing dates, and data freshness before acting on results.

FAQ

How does the portfolio gain/loss calculator work?

Portfolio Gain/Loss Calculator is deterministic and uses only your inputs (position 1 cost basis, position 1 current value, position 2 cost basis, position 2 current value, position 3 cost basis, position 3 current value). Formula: Portfolio P/L = Σ(Current Value - Cost Basis).

What does this output tell me in practice?

Calculate total profit or loss across multiple stock positions. Pair this with a stop-loss and thesis review, not just return math.

Does the portfolio gain/loss calculator use real-time market feeds?

No. This page does not auto-pull live data. You control all inputs and can rerun instantly as market conditions change.

Can I use this result directly for trading decisions?

Use it as a planning layer. Combine with position sizing, liquidity, and catalyst context before any execution.

Disclaimer: This calculator is for educational purposes and does not constitute financial advice. Verify assumptions with official filings, broker statements, and your own risk framework.

After the calculation

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