Calculator Comparison

Income Tax Calculator vs Roth Conversion Calculator

Not sure which calculator to use? Here's a side-by-side comparison of the Income Tax Calculator and Roth Conversion Calculator to help you pick the right one for your needs.

Income Tax Calculator

Tax

Estimate your federal income tax liability based on your income, filing status, deductions, and credits for the current tax year.

What you enter

Filing Status
Gross Annual Income
Total Deductions
Number of Dependents

What you get

Estimated Federal Tax(primary)
Effective Tax Rate
Marginal Tax Rate
After-Tax Income

Includes visual bar chart breakdown

Use Income Tax Calculator

Roth Conversion Calculator

Tax Planning

Calculate the tax cost and long-term benefits of converting a traditional IRA or 401(k) to a Roth IRA.

What you enter

Conversion Amount
Current Taxable Income
Filing Status
Years Until Retirement
Expected Annual Return
Expected Retirement Tax Rate

What you get

Tax on Conversion(primary)
Marginal Rate After Conversion
Future Roth Value
Tax Savings at Retirement

Includes visual bar chart breakdown

Use Roth Conversion Calculator

Key Differences

Feature	Income Tax Calculator	Roth Conversion Calculator
Category	Tax	Tax Planning
Inputs	4 required fields	6 required fields
Outputs	4 results	4 results
Chart	bar chart	bar chart
FAQs	3 answered	3 answered

Input Comparison

Shared Inputs

Filing Status

Only in Income Tax Calculator

Gross Annual Income
Total Deductions
Itemized Deduction Amount
Number of Dependents

Only in Roth Conversion Calculator

Conversion Amount
Current Taxable Income
Years Until Retirement
Expected Annual Return
Expected Retirement Tax Rate

Which Calculator Should You Use?

Use the Income Tax Calculator if you need to:

Calculate estimated federal tax
When you know your filing status and gross annual income
Want a visual bar chart breakdown

Use the Roth Conversion Calculator if you need to:

Calculate tax on conversion
When you know your conversion amount and current taxable income
Want a visual bar chart breakdown

Frequently Asked Questions

What is the standard deduction for 2026?

For 2026, the standard deduction is approximately $15,000 for single filers, $30,000 for married filing jointly, and $22,500 for head of household. These amounts are adjusted annually for inflation.

What is the difference between marginal and effective tax rate?

Your marginal rate is the tax rate on your last dollar of income (your highest bracket). Your effective rate is the average rate across all income, which is always lower than the marginal rate.

When should I do a Roth conversion?

Roth conversions make sense when: you expect higher tax rates in retirement, you're in a temporary low-income year, you want tax diversification, you have cash to pay the tax outside the IRA, or you want to leave tax-free money to heirs. Avoid conversions in high-income years.

How much tax will I pay on a Roth conversion?

The converted amount is added to your taxable income for the year and taxed at your marginal rate. A $50k conversion in the 24% bracket costs about $12k in federal tax. Large conversions can push you into higher brackets, so many people convert gradually over several years.

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Bottom Line

Choose the Income Tax Calculator if you need to calculate estimated federal tax. Use the Roth Conversion Calculator if you need to calculate tax on conversion. Both calculators are free and require no sign-up.

Use Income Tax Calculator Use Roth Conversion Calculator

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