Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Investing
Cost Basis Calculator
Calculates your average cost per share across multiple stock purchases by dividing total dollars invested by total shares owned. Use it to determine your tax cost basis when selling shares bought at different prices.
Fill in the required fields to see your result.
Investing
Roth IRA Calculator
Project your Roth IRA's tax-free balance at retirement by combining your existing savings with years of annual contributions compounding at your expected return. Use it to see how much tax-free income you can generate after age 59Β½.
Fill in the required fields to see your result.
Key differences
| Cost Basis Calculator | Roth IRA Calculator | |
|---|---|---|
| Category | Investing | Investing |
| Inputs required | 2 | 6 |
| Result | Average Cost Basis ($) | Tax-Free Retirement Balance ($) |
| What it does | Calculates your average cost per share across multiple stock purchases by dividing total dollars invested by total shares owned. Use it to determine your tax cost basis when selling shares bought at different prices. | Project your Roth IRA's tax-free balance at retirement by combining your existing savings with years of annual contributions compounding at your expected return. Use it to see how much tax-free income you can generate after age 59Β½. |