Decision workspace

Calculate costs. Compare your options.

Free calculators for car loans, mortgages, income, savings and everyday math. Enter your numbers, see the assumptions, and compare what changes the result.

⌘ K

CalculateGet a clear answer

CompareEvaluate options

SimulateTest assumptions

PlanFollow a workflow

Quick access

Popular tools

View all 218 tools

01Car paymentComplete purchase cost 02MortgagePayment and ownership cost 03PaycheckEstimate take-home pay 04Compound growthProject savings over time 05PercentageSolve everyday percentages 06Debt consolidationCompare debt strategies

Guided work

Start with the decision—not the formula.

All workflows

01Buy a car

Price, financing, trade and ownership

02Buy a home

Affordability, mortgage and closing cash

03Pay off debt

Payoff order, time and interest

04Plan retirement

Savings, income and milestones

Library

Browse by category

Guides & research

Finance56 tools

Automotive27 tools

Math32 tools

Health & Fitness12 tools

Income & Work27 tools

Real Estate22 tools

Business26 tools

Everyday Life16 tools

Transparent by design

Visible formulas, editable assumptions, local-first storage, and results you can inspect.

Review methodology