Calculators
Decision-support tools for sizing, cost, capacity, runtime, ownership, and other practical planning questions.
Estimate a 529 account's future balance from its starting balance, monthly contributions, savings period, and a fixed annual return. Assumes contributions are made at the end of each month and excludes fees and taxes.
Estimate a premature baby's adjusted age by subtracting the weeks born before 40 weeks of gestation from their chronological age. This arithmetic estimate does not assess development or replace guidance from a pediatric clinician.
Calculate the difference between two ages in years and months using each person's age in completed years and additional months.
Estimate a babysitting charge from an hourly base rate, hours worked, number of children, experience level, and additional task time. This simple worksheet-style estimate uses the entered hourly rate as its starting point and assumes fixed per-child and per-task adjustments.
Estimate a party budget from guest count, venue cost, food cost per guest, and activity cost per guest. This simple worksheet adds the costs you enter and does not include taxes, fees, or other unlisted expenses.
Estimate take-home bonus pay by applying your chosen withholding rate to the gross bonus. This is a simple planning estimate, not a calculation of final tax liability.
Estimate monthly childcare hours from the number of care days per week, hours per care day, and weeks in your planning month.
Estimate weekly gross pay from childcare shift length, shifts per week, and hourly pay rate.
Estimate the combined geometric volume of a children’s book collection in cubic inches using the number of books and the average length, width, and thickness of one book. The estimate assumes every book has the same average dimensions and does not account for gaps or shelving space.
Estimate your weekly and annual fuel cost for a regular commute using your round-trip distance, commuting days, vehicle fuel economy, and fuel price. This estimate covers fuel only.
Estimate the annual income needed in a target location to match the purchasing power of your current income, using monthly expense totals you provide. This is a planning estimate, not a live regional cost comparison.
Estimate the ingredient cost for each serving of a recipe by dividing the total ingredient cost by the number of servings. Enter costs and servings using the same batch of food.
Estimate weekly daycare tuition from care days, hours per day, an hourly rate you enter, and an optional age-group adjustment. This worksheet does not include fees, discounts, or provider-specific pricing rules.
Estimate diaper spending over a chosen period from your daily diaper use and the price per diaper. The estimate assumes one average price and steady daily use.
Estimate daily diaper use and the number needed for a chosen planning period from a child's current average daily use. This is a household planning estimate based on the rate you enter.
Calculate the savings and final price of a grocery item after a percentage discount.
Estimate your household's monthly budget balance by subtracting planned family expenses from take-home income. This simple worksheet model uses the amounts you enter and does not predict future costs or recommend how to spend.
Estimate a weekly grocery budget from household size, meals eaten at home, and your household’s observed grocery cost per person per meal. The result is a planning estimate based on the costs you enter.
Estimate a weekly grocery budget by multiplying the number of people by the planned daily food cost per person, then adding a chosen weekly amount for household staples and other shared groceries.
Estimate the annual value of health coverage and paid leave benefits using monthly dollar values and the number of months covered.
Estimate a freelance hourly rate from your target annual pay, annual business expenses, planned unpaid time, and billable hours per working week. This transparent model spreads your annual income and costs across expected billable hours.
Estimate how many projects fit into your available work hours by dividing those hours by the hours required for each project. This simple planning estimate assumes each project takes the same amount of time and does not account for breaks, administration, or changing workloads.
Estimate a grocery budget from your planned weekly spending, household size, meals prepared at home, and pantry coverage. The result scales a weekly per-person baseline by meal frequency and the share of groceries already on hand.
Compare two offers by subtracting their annual salary, expected recurring bonus, and employer retirement contribution totals. Enter each amount in the same currency. The result shows the annual difference between these selected compensation items and does not value other benefits or predict bonus payments.
Estimate the budget gap across a planned job transition by multiplying the difference between monthly expenses and monthly income by the number of transition months. A positive result indicates a gap under these assumptions, while a negative result indicates income exceeds expenses.
Estimate a child's target adult height from both parents' heights using a conventional sex-adjusted mid-parental height formula. This is a rough family estimate, not a prediction of an individual child's final height.
Estimate weekly gross nanny pay from an hourly base rate, scheduled hours, overtime hours, and an additional-child adjustment. This simple worksheet applies one stated overtime multiplier and a flat hourly adjustment for each additional child.
Estimate take-home income by subtracting the taxes and other payroll deductions you enter from gross pay for a chosen pay period.
Estimate gross weekly pay from regular hours, hourly rate, overtime hours, and an assumed overtime pay multiplier. This simple estimate does not determine legal eligibility or account for taxes and other pay rules.
Estimate the difference between income you expect to miss during parental leave and the weekly savings you plan to use. Enter weekly amounts and leave duration to see a simple budget gap estimate.
Estimate gross pay from an hourly wage and typical weekly hours. Choose a pay period to see the equivalent amount before taxes and deductions.
Compare your current gross pay with proposed gross pay to see the amount and percentage of a pay cut over the selected pay period.
Estimate your new annual salary and the dollar value of a raise from your current salary and raise percentage. This simple estimate excludes taxes, benefits, bonuses, and changes to work hours.
Calculate the cost per ounce of a grocery item from its package price and net weight to compare package sizes and meal-budget options.
Find the unit price of a grocery item by dividing its total price by its weight in pounds.
Estimate how your wage's purchasing power changed after accounting for inflation over the same period.
Estimate a recipe’s ingredient cost per serving from the package prices, package amounts, and quantities used. Enter package and recipe amounts in the same unit for each ingredient.
Scale an ingredient quantity from an original recipe to a different serving count. Enter the recipe's original servings, the servings you want, and the ingredient amount from the original recipe.
Compare the annual value of two job offers using salary, annual bonus, and estimated annual benefits. Enter each offer in the same currency and use consistent estimates. The result is the difference in estimated annual compensation, with positive values favoring Offer A.
Convert an annual salary into an estimated hourly wage using your paid workweeks and hours per week. The estimate assumes the same schedule throughout the year and does not account for taxes or unpaid time off.
Estimate total study hours across a school term or year from the number of study days per week, hours studied per day, and number of school weeks.
Add a child’s recreational and school-related screen use to estimate total screen time per day, while viewing each category separately.
Estimate gross severance pay from a user-entered weekly pay amount and assumed weeks of severance per completed year of service. This is a planning estimate, not a determination of legal entitlement.
Calculate what percentage of your monthly income goes toward your monthly student loan payment. This simple ratio uses the payment and income amounts you enter, expressed in dollars for the same month.
Estimate annual take-home pay by subtracting the federal, state, and other payroll withholding amounts you enter from gross annual pay. This simplified worksheet does not calculate tax liability or determine withholding rates.
Estimate your available time off in hours from an opening balance, hours earned per pay period, completed pay periods, and hours already used. This estimate assumes a fixed accrual rate and does not account for employer-specific rules.
Estimate annual total compensation by adding base salary, target bonus, annualized equity, and employer retirement contributions. This simplified estimate does not value benefits or predict variable compensation payments.
Calculate the internal geometric volume of a rectangular toy storage bin from its length, width, and height in inches. The estimate assumes straight sides and dimensions measured inside the bin.
Compare a starting wage with a current wage to calculate the percentage increase and the change in pay per hour.
Calculate total paid work hours from clock-in and clock-out times entered as decimal hours, then subtract unpaid break time. This simple worksheet assumes one continuous shift and same-day times.