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Currency & unitsUSD · Imperial

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Currency changes the unit of your amounts, not their value. No exchange rate or country-specific tax, benefit, or lending rule is applied. Money results and loan schedules retain the calculators’ two-decimal precision; this does not apply local cash-rounding rules.

Measurement changes convert valid existing quantities. Incomplete entries stay as typed; finish them using the units shown. Other units stay as labeled. Enter numbers as 1,234.56; a decimal comma is not supported.

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Payments, saving, and the cost of borrowing.

APR CalculatorEstimate an annualized borrowing rate from net proceeds and monthly payments, or from a fixed loan rate and one-time fees. See the underlying cash flows.APY CalculatorConvert a nominal annual rate to APY or reverse APY to a nominal rate. Compare compounding frequencies, including continuous compounding, and a deposit example.Auto Loan CalculatorCalculate car loan payments or find a vehicle price from your monthly budget. Include down payment, trade-in payoff, tax, fees, and extra-payment savings.Auto Refinance CalculatorCompare auto refinancing with your remaining loan. Include fees, total interest, monthly payments, holding-period debt and a cost-based break-even point.CD CalculatorEstimate a certificate of deposit balance at maturity from its APY, deposit amount, and term. See principal and modeled interest separately.Coast FIRE CalculatorEstimate the Coast FIRE amount needed today, with optional pension or ongoing retirement income. Adjust spending, return, inflation, and retirement age.Compound Interest CalculatorCalculate compound growth with daily, monthly, annual or continuous compounding and independent deposit frequency. Compare beginning and end deposits.Credit Card Payoff CalculatorCalculate credit card payoff time or the fixed payment needed by a target month. Compare adjustable minimum-payment rules, interest and repayment schedules.Debt Consolidation CalculatorCompare 2–10 existing debts with a consolidation loan. Include each balance, rate and payment, new-loan fees, total costs and payoff schedules.FIRE CalculatorEstimate a financial-independence target and time to reach it with ongoing savings. Include spending, retirement income, return and inflation assumptions.HELOC CalculatorModel a HELOC draw period with regular borrowing and interest-only payments, then a repayment period with a separate rate and term. Check the credit limit.Loan CalculatorCalculate loan payments with a term in years or months. Compare monthly and one-time extra payments, payoff time, interest saved, and an amortization schedule.Margin CalculatorCalculate profit margin, markup, and unit profit from selling price and cost. Understand the difference between margin and markup.Mortgage Affordability CalculatorEstimate a home-price budget from income, other debts, adjustable housing and debt ratios, cash down payment, taxes, insurance, HOA and mortgage terms.Mortgage CalculatorEstimate a mortgage payment with taxes, insurance, HOA, and PMI. Enter down payment in dollars or percent and compare monthly or one-time extra payments.Mortgage Recast CalculatorEstimate the payment after a principal lump sum and mortgage recast. Compare keeping the original payment, payoff time, interest and an entered cash recast fee.Mortgage Refinance CalculatorCompare mortgage refinancing costs, monthly payments, fees, mortgage insurance and remaining debt at the same holding date. See lasting cost break-even.Retirement CalculatorConnect retirement saving and withdrawals in one scenario. Model inflation, income, portfolio balances and the monthly saving needed through a chosen end age.Retirement Withdrawal CalculatorModel monthly retirement withdrawals, inflation and other income that starts later. See portfolio depletion, spending shortfalls and annual balances.Salary CalculatorConvert gross hourly, weekly, biweekly, monthly, or annual pay. Adjust working hours and paid weeks to compare equivalent pay periods.Simple Interest CalculatorCalculate simple interest or solve for principal, annual rate or duration. Use years, months or days with an explicit 360/365-day basis.

Percentages, fractions, ratios, coordinates, and unit conversions.

Fraction CalculatorAdd, subtract, multiply, or divide fractions and mixed numbers. Get an exact simplified fraction, a mixed number, and a decimal approximation.Percentage CalculatorCalculate a percentage of a number, one number as a percent of another, percentage change, or an increase or decrease. See the formula for each result.Ratio CalculatorSimplify a ratio and scale it to a new second quantity. Use exact whole-number ratios for recipes, dimensions, and comparisons.Slope CalculatorFind the slope, intercept, rise, run, and distance between two points. Vertical lines are identified explicitly.Unit ConverterConvert length, area, volume, mass, temperature, speed, time, pressure, energy and angles. Distinguish US and Imperial units and temperature differences.

Adult body measurements and clearly explained energy estimates.

BMI CalculatorCalculate adult BMI with metric or imperial measurements, see the CDC category, and understand the height-based reference weight interval.BMR CalculatorEstimate adult resting calorie needs with the Mifflin–St Jeor equation. Use pounds/inches or kilograms/centimeters and inspect the calculation.Body Fat CalculatorEstimate adult body fat from height and body circumferences using legacy circumference equations. Show estimated fat and fat-free mass with metric or imperial inputs.Calorie Deficit CalculatorCalculate daily and weekly calorie gaps from maintenance energy and a chosen reduction or intake. Compare selected deficit days with maintenance days.Protein CalculatorConvert an adult protein reference range or custom grams-per-kilogram factors into daily and per-meal grams using metric or imperial body weight.TDEE CalculatorEstimate total daily energy expenditure using resting calorie needs and an explicit activity multiplier. Compare activity scenarios in kcal and kJ.

Ages, calendar dates, and hours worked.

Age CalculatorCalculate age on a chosen date or compare the age difference between two people. See years, months, days, and total elapsed days.Business Day CalculatorCount working days between dates or add and subtract business days. Choose weekends, include or exclude endpoints, and enter custom holidays.Date CalculatorCount days between two dates, include the end date, or add and subtract days and weeks. Find the resulting date and weekday, including leap years.Hours CalculatorCalculate hours between two times, subtract unpaid breaks, and convert the result to decimal hours. Supports overnight and multi-day periods.Time Card CalculatorCalculate weekly work hours, unpaid breaks, overtime and gross pay. Add multiple shifts per day, handle overnight work, and download your time card.

Bills, shopping, and energy use.

Discount CalculatorCalculate sale prices, successive discounts, savings, and sales tax. Compare the actual combined discount for a promotion.Electricity Cost CalculatorEstimate appliance electricity use and cost from watts, hours, days, quantity, and your own price per kWh.Tip CalculatorCalculate a tip and split the total bill among any number of people. See a cent-accurate split when equal shares do not divide evenly.

Plan coursework and understand grade targets.

Final Grade CalculatorCalculate the final-exam score needed for a target course grade. See the best and worst possible course outcomes.GPA CalculatorCalculate semester and cumulative GPA with letter grades or grade points. Model weighted courses and find the future GPA needed to reach your target.

Measure areas and estimate project materials.

Concrete Block CalculatorEstimate concrete blocks for walls with openings, nominal or actual block dimensions, mortar joints, waste, mortar bags and editable material prices.Concrete CalculatorEstimate concrete volume and whole bags for a rectangular slab. Set thickness, waste allowance, and the yield printed on your bag.Concrete Footing CalculatorCalculate concrete for strip footings, rectangular pads or round piers. Include repeated elements, waste, bag yield, metric units and material estimates.Concrete Slab Cost CalculatorCompare bagged concrete and ready-mix slab costs. Include dimensions, waste, whole bags, minimum delivery volume, order increments, labor, and your prices.Square Footage CalculatorCalculate the area of a rectangle, triangle, or circle. Convert square feet to square meters, square yards, and acres.

Prepare holiday meals and decorating projects.

Christmas Lights CalculatorEstimate light strands for a measured decorating run, plus electrical energy use and cost for the display period.Turkey Thawing CalculatorPlan refrigerator or cold-water thawing time from turkey weight, using USDA guidance and clear handling instructions.

Soil, gravel, and materials for outdoor work.

Paver Base CalculatorCalculate base gravel and bedding sand separately from your patio dimensions. Adjust compaction and waste, then see cubic yards and bag counts.Raised Bed Soil CalculatorEstimate soil for one or several matching raised beds. Compare cubic feet, cubic yards, and whole soil bags using your bag’s listed volume.

Accurate spacing for wall trim and panels.

Board and Batten CalculatorPlan equal board-and-batten spacing on one wall. Choose whether edge battens are included and see clear gaps, center spacing, and batten positions.Wainscoting CalculatorCalculate equal wainscoting panel openings and basic rail-and-stile material for one wall. Enter panel count, side margins, trim width, and height.

Count pickets for a measured fence run.

Fence Picket CalculatorEstimate pickets to install and order for a straight fence run. Enter actual picket width, desired gap, run length, and an optional waste allowance.

Plan snow clearing, service costs, and loads.

Snow Removal Pricing CalculatorEstimate a snow removal quote from crew time, labor, equipment, materials, and target margin. Compare per-visit costs and a planned season total.Snow Volume CalculatorCalculate snow volume from area and average depth in cubic yards, cubic feet, and cubic meters. Estimate truck-body loads with an adjustable usable capacity.

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