Calculator Panel
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Enter your values above and click Calculate.
What This Calculator Does
This calculator tracks capital appreciation by comparing the current market value of an asset against your initial cost basis. It determines both your absolute dollar gain and your total percentage growth.
How to Use This Calculator
Input your initial cost basis and the current market value of your asset. Click Calculate to immediately view your absolute paper gain and percentage appreciation.
How the Calculation Works
The underlying math engine processes your inputs using exact formulas. This systematic approach ensures professional, institutional-grade calculation precision:
Mathematical Formula
Formula Legend:
- · MV = Current market value of the asset position.
- · CB = Cost basis or initial purchase capital.
Practical Example
Suppose you purchase an investment at a cost basis of $12,500 and its current market value rises to $19,250:
Step-by-Step Mathematical Walkthrough:
- 1 Subtract your cost basis from the current market value: $19,250 - $12,500.
- 2 The absolute dollar gain is exactly $6,750.
- 3 Divide the dollar gain by the cost basis: $6,750 / $12,500 = 0.54.
- 4 Multiply by 100 to find the gain percentage: 0.54 * 100 = 54.0%.
Important Assumptions & Notes
- The current market value is accurate and up-to-date.
- The cost basis includes all transaction costs and commissions.
- The calculated gain represents unrealized paper gains until the asset is sold.
- Taxes are not factored into the unrealized gain calculation.
Common Mistakes or Considerations
- Confusing unrealized paper gains with realized cash profits, which only occur after liquidation.
- Failing to update your cost basis when making additional purchases over time.
- Ignoring the impact of inflation on the purchasing power of your gains.
- Neglecting capital gains tax liabilities that will apply once you sell the asset.
Frequently Asked Questions
What is an unrealized gain?
An unrealized gain (or paper gain) is an increase in the value of an asset that has not yet been sold for cash.
What does cost basis mean?
Cost basis is the total cost of acquiring an asset, including the purchase price and any broker fees or commissions.
How is percentage gain calculated?
Percentage gain is calculated by dividing the absolute dollar gain by your cost basis and multiplying by 100.
Does this calculator account for dividends?
No, this calculator focuses strictly on capital appreciation (price changes). Reinvested dividends should be added to your current market value to reflect total gain.
Why is tracking cost basis critical?
An accurate cost basis is essential for calculating your true investment performance and reporting taxable capital gains to the IRS.
How do capital gains taxes work?
When you realize a gain by selling an asset, you owe taxes on the profit. Long-term capital gains (held over 1 year) are taxed at lower rates than short-term gains (held under 1 year).