Taxes

Federal income tax estimator
How much self-employment tax will I pay?
Tax refund estimator
Tax Freedom Day

Investments & retirement

How do taxes and inflation impact my investment return?
Social security retirement income estimator
Compare taxable vs. tax-free investment return
How long will my money last?
Historical inflation – Compare purchasing power

Credit

Comprehensive mortgage calculator
What are the tax savings generated by my mortgage?
Which is better, cash up front or payments over time?
What is the impact of making extra debt payments?
Should I pay off debts or invest the money?

Business calculators

How many units do I need to sell to breakeven?
What are my tax savings with Section 179 deduction?
Should I lease or buy equipment?