Free budget calculators
for every situation
30+ calculators for daily spending, housing, travel, family milestones, and debt — all free, no sign-up.
Practical estimates, real spending data
Every calculator draws on recognised frameworks — BLS averages, 50/30/20, EPI family budgets, lender rules — so results reflect how people actually spend.
Common questions
Everything you need to know about the calculators.
Yes — every calculator on CalculatorMom is completely free. There is no premium tier, no subscription, and no account required. Enter your numbers and get results immediately, on any device.
Results are calibrated against Bureau of Labor Statistics consumer expenditure data, standard lender affordability guidelines, and industry cost benchmarks. They give a solid planning baseline — your actual costs will vary by location, household size, and lifestyle. Use the outputs as a starting framework and adjust to your own situation.
Start with the Budget Based on Income calculator. Enter your monthly take-home pay and it applies the 50/30/20 rule — 50% to needs, 30% to wants, and 20% to savings or debt payoff. Once you have that framework, use the dedicated category tools to sharpen each line item.
The 50/30/20 rule divides after-tax income into three buckets: 50% for needs (rent, groceries, utilities, minimum debt payments), 30% for wants (dining out, subscriptions, hobbies), and 20% for savings and extra debt repayment. It is a widely used starting point, not a rigid rule — households in high-cost areas often need to adjust the percentages to fit their reality.
The Trip and Budget Calculator for Trip cover end-to-end travel costs — flights, accommodation, and activities. The Road Trip calculator is built for driving journeys, factoring in fuel, tolls, and overnight stops. The Vacation Food Budget isolates just the dining portion of any trip, useful when planning meals separately from the overall travel budget.
The Food Budget Calculator covers your total food spend — groceries, takeout, restaurants, and meal delivery combined. The Grocery Budget Calculator focuses specifically on supermarket spending for a given household size. Use Food for all-in costs, Grocery when setting a weekly shop target.
Start with the Homebuying Budget Calculator to find a price range based on your income and savings. Most lenders recommend keeping total housing costs — mortgage, taxes, and insurance — below 28% of gross monthly income. The Household Budget Calculator can then model your ongoing monthly costs once you move in.
The Debt Budget Calculator shows your total interest cost and payoff timeline, letting you compare the cost of carrying debt against what you would earn by saving instead. As a general rule, if your debt’s interest rate exceeds your expected savings return, paying it down first makes mathematical sense. A financial adviser can factor in your full picture — tax situation, emergency fund, retirement contributions.
A quick monthly check is enough for most people — compare actual spending against what you planned in each category. Do a full review whenever your income changes, you take on a new fixed expense, or you are approaching a milestone such as a wedding, new baby, or home purchase. The calculators here are designed to be re-run as circumstances change.
Nothing you enter is saved, transmitted, or retained. All calculations run locally in your browser and disappear when you close the tab. There are no accounts, no tracking of individual inputs, and no sharing of your figures with any third party.