Financial Calculators

Make the numbers behind everyday money decisions easier to understand.

DollarOak financial calculators are designed to help you explore common personal finance questions — from saving and debt repayment to mortgages, investing and retirement.

Enter your own information, adjust the assumptions, and compare different scenarios before making a decision.

Important: DollarOak calculators are educational tools. Results are estimates based on the information and assumptions entered and should not be considered individualized financial, investment, tax, legal or lending advice.

Popular Financial Calculators

Explore our most useful calculators for everyday financial decisions.

Retirement

Plan contributions, estimate long-term growth and explore different retirement-saving scenarios.

401(k) Growth Calculator
Estimate how your current balance, contributions, employer match, investment return and time horizon could affect your 401(k) balance.

Saving & Investing

Understand how contributions, time and compound growth can change your savings.

Compound Interest Calculator
Estimate how an initial investment and regular contributions could grow over time.

Credit & Debt

See how interest rates, monthly payments and additional payments may affect your debt.

Credit Card Payoff Calculator
Estimate how long it could take to pay off a credit card balance and how much interest you may pay.

Home & Mortgage

Explore the costs involved in borrowing for a home.

Mortgage Payment Calculator
Estimate monthly principal and interest payments based on the home price, down payment, loan term and interest rate.

Emergency Savings

Build a savings target based on your essential monthly expenses.

Emergency Fund Calculator
Estimate how much you may want to keep available for several months of essential expenses.

How DollarOak Calculators Work

We want our calculators to be understandable rather than black boxes.

Depending on the calculator, results may be based on:

• Standard mathematical formulas
• Information you enter
• Clearly stated assumptions
• Current U.S. government rules and limits when applicable
• Published information from sources such as the IRS, Social Security Administration, Consumer Financial Protection Bureau and other appropriate primary sources

Rules-based calculators identify the rules or tax year being used whenever that information could materially affect the result.

You can learn more about our approach in our Calculator Methodology.

Understand the Assumptions

Financial calculators cannot predict the future.

Investment returns can change. Interest rates vary between lenders. Taxes depend on individual circumstances. Insurance, housing costs and other expenses can differ considerably between households.

For that reason, DollarOak calculators are designed to help you explore scenarios, not promise outcomes.

Where possible, important assumptions are shown directly within the calculator so you can adjust them yourself.

Use Calculators Alongside Our Guides

A calculator can show you the numbers, but understanding what those numbers mean is just as important.

DollarOak pairs financial calculators with plain-English guides covering topics such as:

• Personal finance
• Credit and debt
• Saving
• Banking
• Investing
• Retirement
• Major financial decisions

Look for related DollarOak guides beneath individual calculators for additional explanation and context.

Calculator Accuracy and Updates

We review calculators when important formulas, limits or government rules change.

Calculators affected by annual U.S. limits or tax rules may display the applicable rules year and source information.

If you believe a calculator is producing an unexpected result, please contact DollarOak and include the calculator URL, the inputs you used and the result you received.

Important Information

DollarOak provides financial calculators for educational and informational purposes only.

Calculator results are estimates and may not reflect every factor that applies to your individual circumstances.

Before making significant financial, tax, investment, borrowing or retirement decisions, consider reviewing the relevant information from official sources or consulting an appropriately qualified professional.

Read our Financial Disclaimer for more information.