Plan the move
Size a mortgage, rent, or refinance decision against income and budget.
Home & family calculators
Home & Family Calculators for Housing, Household, and Planning Decisions
Plan a housing move, household budget, energy bill, or family milestone with private tools that keep assumptions visible and results in your browser.
Built for homeowners, renters, families, soon-to-be parents, students, and household planners. Inputs stay local unless a tool clearly says otherwise.
Decision support
Use these tools before money changes hands
Run the household
Estimate energy, savings goals, and school budgets around family priorities.
Family health & timing
Use transparent health screening and planning tools with clearly stated methods.
Tool cluster
Recommended tools
Featured
Mortgage Affordability Calculator
Find an affordable home price from income, debts, down payment, rate, taxes, insurance, HOA, and your DTI cap.
Featured
Mortgage Payment Calculator
Estimate your monthly mortgage payment including principal, interest, taxes, and insurance. Enter loan amount, rate, and term for a full breakdown. Private.
Featured
Mortgage Refinance Break-Even Calculator
Compare old and new mortgage payments and estimate refinance break-even time.
Featured
Rent Affordability Calculator
Estimate affordable rent using your income, chosen cap, debt, and savings. Your suggested maximum is the lower of the income cap or cash available.
Useful
Down Payment Calculator
Calculate your down payment, loan amount, closing costs, and cash needed to close in percent or dollar-amount mode.
Useful
Savings Goal Calculator
Calculate the monthly deposit needed to reach a savings goal with an editable APY and deadline.
Useful
School Supply Budget Calculator
Estimate a back-to-school supply budget by grade level and number of children, including clothing, backpack extras, and estimated tax.
Useful
BMI Calculator
Calculate BMI quickly and privately in your browser.
Useful
Pregnancy Calculator
Estimate your pregnancy due date and current week from your last period, conception date, or a known due date. Private, no account.
Useful
Ideal Weight Calculator
Estimate your ideal body weight using seven common formulas (Hamwi, Devine, Robinson, Miller, Broca, Lorentz, Peterson) plus a healthy BMI range.
Useful
LED Savings Calculator
Compare old and LED lighting energy cost, annual savings, and simple payback period.
Useful
Electricity Cost Calculator
Estimate appliance energy use and daily, monthly, and annual electricity cost.
Useful
Flooring Calculator
Estimate flooring area, waste allowance, and boxes required for a room.
Useful
Paint Coverage Calculator
Estimate paintable wall area and gallons needed after subtracting doors and windows.
Useful
Concrete Calculator
Estimate concrete volume, weight, and bags for a slab. Includes a built-in waste factor so you order enough the first time.
Useful
Savings Growth Calculator
Savings calculator for monthly compound growth. Enter an amount, annual rate, and years to estimate your future savings value.
Trust model
Useful pages, not thin pages
These collections group existing tools around real decisions. The calculators keep assumptions visible, link to related tools, state important limitations, and point toward quality evidence so you can verify inputs before relying on a result.
FAQ
Common questions
Are the health calculators medical advice?
No. Screening and planning tools are for general estimates and have stated limitations. Consult a qualified professional for medical guidance.
Do household estimates match my actual bills?
They are planning estimates. Actual utility, tax, and family costs vary with location, use, and lifestyle.
Which tool fits my situation?
Start with the decision (housing, energy, savings, or family health) and the hub links related tools for each.