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Plan with clearer assumptions

Clear answers for everyday money decisions.

Explore borrowing, saving, and investing scenarios with focused calculators that show how your inputs shape the estimate.

Choose a calculator
Built for comparison

Adjust one assumption at a time, then review the result and the path behind it.

Start with your question

Which decision are you working through?

Life planning

What if I quit?

How long could my savings last if I stopped working for a while?

Explore time away

Borrowing

Auto loan

What could my car payment and total purchase cost be after a trade-in, taxes, fees, and insurance?

Estimate an auto loan

Home planning

Mortgage affordability

What home price range may fit my income, debts, down payment, and monthly budget?

Explore a home price range

Investing

Investment returns

How might contributions, fees, inflation, and an assumed return affect long-term value?

Model investment returns

A simple process

How it works

  1. Enter assumptions

    Use values that reflect the scenario you want to explore.

  2. Review results

    See the main estimate alongside the factors that influence it.

  3. Explore the chart

    Compare how balances, costs, or growth may change over time.

Understand the estimate

Your numbers should come with context.

These tools are designed to make assumptions visible, not to hide uncertainty behind a single result.

  • Transparent formulas

    Methods, conventions, and rounding choices are documented for review.

  • Calculated in your browser

    Your calculator inputs stay in the current page unless you explicitly choose to share or export them.

  • Educational, not predictive

    Results are modeled estimates, not quotes, approvals, advice, or guaranteed outcomes.

Look under the hood

See how every estimate is built.

Review the formulas, calculation conventions, rounding approach, assumptions, and known limitations used across the site.

Read our methodology