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
Mortgage affordability calculator: estimate how much house you can afford from income, debts, and down payment using front-end and back-end DTI. Free.
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
Mortgage refinance break even calculator: compare closing costs against monthly savings to find when refinancing pays off. Free, editable rates, no signup.
Featured
Rent Affordability Calculator
Rent affordability calculator: find max rent by income using the 30% rule, debt, and rent-to-income ratio. Free, private, runs in your browser, no signup.
Useful
Down Payment Calculator
Down payment calculator: work out home down payment amount, loan to value, cash to close, and closing costs from your available cash. Free, no signup.
Useful
Savings Goal Calculator
Savings goal calculator: find the monthly deposit or timeline needed to hit a savings target with compound interest. Free, editable rates, runs locally.
Useful
School Supply Budget Calculator 2026: Estimate Costs by Grade
School supply budget calculator: estimate back to school costs by grade from supply lists and prices, and plan your 2026 shopping budget. Free, no signup.
Useful
BMI Calculator
bmi calculator that computes body mass index from height and weight, with healthy ranges by age for men and women. Free, private, runs locally in your browser.
Useful
Pregnancy Calculator
Pregnancy calculator: find your due date, current week of pregnancy, and estimated conception date from your last period. Free, in your browser, no signup.
Useful
Ideal Weight Calculator
Ideal weight calculator by height: compare the Devine, Robinson, Hamwi, and Miller formulas side by side and see why they disagree. Free, runs in your browser.
Useful
LED Savings Calculator
LED savings calculator: compare LED vs incandescent bulbs and compute yearly energy cost savings and payback period. Free, runs in your browser, no signup.
Useful
Electricity Cost Calculator
Electricity cost calculator: compute what any appliance costs to run from wattage, hours used, and your rate. Editable rates, free, runs locally in your browser.
Useful
Flooring Calculator
Flooring calculator: work out square footage, boxes needed, and a waste allowance for hardwood, laminate, tile, or vinyl so you order right. Free, no signup.
Useful
Paint Coverage Calculator
Paint coverage calculator: estimate gallons of paint needed for walls and ceilings by room size and coats. Free, private, runs in your browser, no signup.
Useful
Concrete Calculator
Concrete calculator: work out slab volume, cubic yardage, and how many concrete bags you need from your slab dimensions. Free, no signup, runs locally.
Useful
Savings Growth Calculator
Savings calculator: project how much your savings will grow with compound interest, deposits, and time to reach a future value. Free, runs in your browser.
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.