Family Calculators Comparison
All 40 Family calculators in one comparison table, with the formula and a worked example for each.
What you can work out with these calculators
Family calculators support the long-horizon planning that is hardest to judge by eye: predicting a child's adult height, building a family budget, saving toward education and estimating childcare costs. They use published growth and finance methods with clearly stated assumptions, and are planning aids rather than advice.
- Estimate a child's adult height from parents' heights and the child's current age.
- Build a family budget that separates fixed commitments from flexible spending.
- Project how much to save monthly to reach a future education cost.
- Estimate childcare costs for the hours and arrangement you actually need.
Compare calculators by what you enter
All 40 calculators here, one row each: what each tool works out and the fields it asks for before it does. Open any row to use the calculator itself.
| Calculator | What it works out | What you enter |
|---|---|---|
| Baby Weight Percentile | Track baby weight against percentiles | Age (months) · Weight (kg) · Gender |
| Baby Feeding Schedule | Calculate formula feeding amounts | Age (weeks) · Weight (kg) · Feedings/Day |
| Baby Sleep Schedule | Calculate optimal sleep schedule | Age (months) |
| Child Height Predictor | Predict adult height from parents | Father (cm) · Mother (cm) · Gender |
| Screen Time Limits | Calculate recommended screen time | Age (years) · Current (min/day) |
| Children BMI Percentile | Calculate BMI percentile for kids | Age (years) · Weight (kg) · Height (cm) · Gender |
| Family Monthly Budget | Plan a complete family budget | Monthly Income ($) · Housing ($) · Food ($) · Transport ($) · Utilities ($) |
| Childcare Cost Comparison | Compare daycare vs nanny costs | Children · Daycare/Child/Week ($) · Nanny/Week ($) · Parent Salary ($/mo) |
| 529 College Savings | Calculate college savings needed | Child Age · Monthly Savings ($) · Current Savings ($) · College Cost ($/yr) · Return % |
| UK Statutory Maternity Pay | Calculate UK Statutory Maternity Pay (SMP) | Average Weekly Earnings (£) · Leave Weeks (1-39) |
| Life Insurance Need | Calculate life insurance coverage | Annual Income ($) · Total Debts ($) · College Fund ($) · Years to Cover |
| Home Buying Budget | Calculate how much house you can afford | Annual Income ($) · Down Payment ($) · Monthly Debts ($) · Mortgage Rate % · Loan Term (years) |
| Wedding Budget Planner | Plan wedding budget by category | Total Budget ($) |
| Baby Name Popularity | Check baby name popularity trends | Name · Year |
| College Savings Calculator | Calculate monthly savings needed for college | Child Age · Annual College Cost ($) · Years of College · Expected Return % |
| Childcare Cost Calculator | Calculate annual childcare costs | Child Age (years) · Care Type · Days/Week |
| Family Budget Calculator | Plan family monthly budget | Monthly Income ($) · Housing ($) · Food ($) · Transport ($) · Utilities ($) |
| Maternity Leave Budget Planner | Savings needed to cover expenses during maternity leave | Monthly Expenses ($) · Weekly Leave Income ($) · Leave Weeks |
| US Paid Family Leave Planner | Estimate paid family/paternity leave benefits by state | Annual Salary ($) · State Program · Leave Weeks · Weekly Benefit Cap ($) |
| Allowance Calculator | Calculate age-appropriate allowance | Child Age · Chores Per Week · Method |
| Babysitter Rate Calculator | Calculate fair babysitter pay | Number of Kids · Hours Needed · Youngest Age · Location |
| Screen Time Guidelines | Calculate recommended screen time by age | Child Age |
| Diaper Cost Calculator | Calculate annual diaper expenses | Diapers/Day · Cost per Diaper ($) · Months |
| Family Vacation Cost | Budget a vacation with kids | Destination · Family Size · Days · Budget Level |
| Baby Formula Amount | Formula per feeding by age and weight | Baby Weight (kg) · Age (months) · Feedings per Day |
| Diaper Needs Calculator | Diapers per day and total cost | Age · Diapers per Day · Price per Diaper ($) · Months to Stock |
| Kids Shoe Size Converter | Convert child shoe sizes between systems | US Size · Gender |
| Family Meal Cost | Cost per family meal and weekly total | Family Members · Cost per Serving ($) · Home Meals per Week |
| School Supplies Budget | Back-to-school supplies budget | Children · Grade Level · Budget per Child ($) |
| Kids Birthday Party Cost | Plan a kids party budget | Kids Invited · Venue Cost ($) · Food/Goodies per Child ($) · Cake ($) |
| Child Allowance Calculator | Suggested weekly allowance | Child Age · Chores Completed/Week · Per Chore ($) |
| Teen Budget Calculator | Teach teens a monthly budget | Monthly Income ($) · Save % · Spend % · Share/Give % |
| Estate Planning Calculator | Estimate estate value and taxes | Total Assets ($) · Debts ($) · Exemption ($) · Heirs |
| Sibling Age Gap | Age gap between children | Older Child Birth · Younger Child Birth |
| Childcare Weekly Cost | Weekly childcare cost by hours | Hours per Week · Hourly Rate ($) · Days per Week |
| Baby Milestones Guide | Typical milestones reached by a given age | Baby Age (months) |
| Child Support Split Calculator | Income-proportional share of a base support amount | Your Monthly Income ($) · Other Parent Income ($) · Base Support Need ($/mo) |
| Ancestor Count Calculator | Ancestors at each generation back | Generations Back |
| Alimony and Spousal Support Estimator | Rough monthly spousal support estimate from the income gap, length of marriage and children. | Higher earner monthly income · Lower earner monthly income · Years married · Children |
| Bereavement Financial Runway Calculator | Estimate the financial runway after losing a partner and the key items that must be reviewed and recalculated. | A valid will exists · Life insurance payout · Existing savings · Monthly expenses · Survivor benefit expected |
Prefer the annotated list? Browse the full list with one line on what each calculator does.
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