Free calculators for a busy home, with the maths shown
10 quick tools for family money, home projects and everyday wellness: a 50/30/20 budget, debt payoff, savings goals, your USDA grocery budget, paint and rug sizes, a chore chart by age, water, sleep and steps. Every figure comes from a published source, linked on the page.
MoneyHomeWellness
Money
Budget calculator (50/30/20)Split your pay 50/30/20, or give every dollar a job.Debt payoff calculatorSnowball vs avalanche, or one credit card.Savings goal & emergency fundWhen you’ll get there, plus 52-week and envelope challenges.Grocery budget calculatorYour family’s USDA food-plan cost, by age.
Home
Wellness
Quick answers
| Question | Answer | |
|---|---|---|
| What is the 50/30/20 rule? | 50% needs, 30% wants, 20% savings and debt | Budget |
| How much do groceries cost for a family of 4? | About $1,388 a month (USDA moderate plan) | Groceries |
| How much does a gallon of paint cover? | About 350–400 sq ft per coat | Paint |
| What size rug for a queen bed? | 8 × 10 ft | Answer |
| How much water should I drink a day? | About 9.3 cups (women) to 12.7 cups (men) of drinks | Water |
| How many steps in a mile? | About 2,000 to 2,500 | Steps |
How we keep it honest
- Figures come from sources such as the USDA, the American Academy of Pediatrics, the National Academies and the American Academy of Sleep Medicine, linked on every page.
- Where a rule is only a rule of thumb, the page says so.
- No diet, calorie or supplement tools: those need a professional who knows you.
- Your entries never leave your browser.
