All calculators
210 calculators across 10 categories. Search by name or by what you want to work out, or narrow by category.
210 calculators
- 401(k) CalculatorProject 401(k) growth with employer matching and 2026 IRS limitsFinance
- A1C CalculatorConvert A1C to estimated average glucose (eAG) and backHealth & Fitness
- Acres to Square Feet ConverterConvert acres to square feet and back — 1 acre = 43,560 sq ftUtility & Math
- Age CalculatorExact age in years, months, and days — with totals and birthday countdownUtility & Math
- Alcohol Units CalculatorConvert drink volume and ABV into UK units and US standard drinksHealth & Fitness
- Amortization CalculatorMonthly payment and a full month-by-month amortization schedule for any loanFinance
- Area CalculatorCalculate the area of square, rectangle, circle, triangle, and more with unit conversionUtility & Math
- Auto Insurance EstimatorRough car insurance premium estimate from your driver profileAutomotive
- Average CalculatorMean, median, mode, range, and sum from any list of numbersUtility & Math
- BAC CalculatorEstimate blood alcohol content (Widmark) — an estimate, never for drivingHealth & Fitness
- Bill Split CalculatorSplit a check evenly with tip among any number of peopleLifestyle
- Blood Pressure Category CheckerClassify a reading with AHA categories (normal to crisis)Health & Fitness
- BMI CalculatorCalculate your Body Mass Index and understand your weight categoryHealth & Fitness
- BMR CalculatorBasal metabolic rate (calories at rest) via Mifflin-St JeorHealth & Fitness
- Boat Loan CalculatorMonthly payment, amount financed, and total interest on a boat loanFinance
- Body Fat CalculatorEstimate body fat percentage with the US Navy tape-measure methodHealth & Fitness
- Break-Even CalculatorCalculate units and revenue needed to break even. Find your contribution margin and margin of safety.Business
- BSA CalculatorBody surface area by Mosteller and Du Bois, with mg/m² dose mathHealth & Fitness
- Budget PlannerPlan your monthly budget using the 50/30/20 ruleFinance
- Calorie CalculatorCalculate daily calorie needs (BMR & TDEE) using Mifflin-St JeorHealth & Fitness
- Calories Burned CalculatorCalories burned for 25 activities using Compendium MET valuesHealth & Fitness
- Cap Rate CalculatorNOI and capitalization rate for rental property, or value from a target capReal Estate
- Car Depreciation CalculatorProject your car's value year by year with adjustable depreciation ratesAutomotive
- Car Lease CalculatorLease payment from cap cost, residual, and money factor — real dealer mathAutomotive
- Car Payment CalculatorEstimate your monthly auto loan payment with trade-in and taxFinance
- Carbon Footprint CalculatorAnnual household CO2 from energy and travel, broken down by sourceEnergy
- Cattle Profit CalculatorFeeder cattle net profit, cost of gain, and break-even priceAgriculture
- CD CalculatorCertificate of deposit growth at any APY, with early-withdrawal penalty mathFinance
- Celsius to Fahrenheit ConverterConvert °C to °F and back — °F = °C × 9/5 + 32Utility & Math
- Character CounterCount characters with and without spaces, plus platform limitsUtility & Math
- Cholesterol Ratio CalculatorTotal:HDL ratio and non-HDL cholesterol heart-health markersHealth & Fitness
- Circle CalculatorCalculate radius, diameter, area, and circumference from any known valueUtility & Math
- Cleaning Service CalculatorCalculate cleaning service pricing by home size, type, and add-onsBusiness
- cm to Feet ConverterConvert centimeters to feet and back — ideal for heightUtility & Math
- cm to Inches ConverterConvert centimeters to inches and back — 1 cm = 0.3937 inUtility & Math
- College Cost CalculatorProjected college cost with inflation and your 529 savings coverageFinance
- Commission CalculatorFlat or tiered commissions with splits and base salaryBusiness
- Commute Cost CalculatorDaily, monthly, and annual cost of driving to work with wearTransportation
- Compound Interest CalculatorSee how compound interest grows your savings over timeFinance
- Concrete CalculatorCubic yards and bags of concrete for a slab, footing, or columnReal Estate
- Construction Bid CalculatorCalculate construction project bids with materials, labor, and overheadBusiness
- Consulting Rate CalculatorCalculate your freelance or consulting hourly rate, day rate, and project quotesBusiness
- Cooking Time CalculatorRoasting time, oven temp, and internal temp by meat and weightLifestyle
- Credit Card Payoff CalculatorSee your payoff date and total interest cost for any credit cardFinance
- Crop Yield CalculatorTotal production, revenue, profit, and break-even yield for a fieldAgriculture
- Crypto ConverterLive Bitcoin and crypto prices — convert coins to fiat or each otherFinance
- Crypto Profit CalculatorLive unrealized profit/loss, ROI, and break-even on a crypto positionFinance
- Cups to mL ConverterConvert US cups to milliliters and back — 1 cup = 236.588 mlUtility & Math
- Currency ConverterLive exchange rates for 30 major currencies (European Central Bank)Finance
- Date CalculatorDays between dates (with business days) or add days to any dateUtility & Math
- Days Until CalculatorCount down the days, weeks, and months from today to any dateUtility & Math
- Debt Payoff CalculatorCompare avalanche vs. snowball strategies to pay off debt fasterFinance
- Dimensional Weight CalculatorDIM weight and billable weight carriers use to price shipmentsTransportation
- Discount CalculatorCalculate sale prices, discount percentages, and original pricesFinance
- Down Payment CalculatorCash to close at any down payment tier, with PMI thresholds and months to saveReal Estate
- DTI CalculatorDebt-to-income ratios scored against 28/36, FHA, VA, and conventional limitsFinance
- E-commerce Profit CalculatorCalculate profit per unit sold with COGS, fees, shipping, and ad spendBusiness
- Education Savings CalculatorProject a 529 college fund and the monthly savings to reach a goalFinance
- Electricity Cost CalculatorWhat any appliance costs to run per day, month, and yearLifestyle
- Emergency Fund CalculatorCalculate how much emergency savings you need and when you'll reach itFinance
- EV Savings CalculatorCompare electric vs gas fuel cost per year, per mile, and lifetimeEnergy
- Event Budget CalculatorTrack event spending by category against a total budgetLifestyle
- Exponent CalculatorRaise any base to any power, including negative and fractionalUtility & Math
- Fabric CalculatorYards of fabric needed, accounting for bolt width and pattern repeatLifestyle
- Fertilizer Application CalculatorFertilizer product needed to hit a target nutrient rate per acreAgriculture
- FIRE CalculatorYour FI number, years to financial independence, and Coast FI thresholdFinance
- Fix and Flip CalculatorCalculate fix and flip profit, ROI, and 70% rule checkReal Estate
- Fleet Fuel Cost CalculatorAnnual fleet fuel spend and savings from better MPGTransportation
- Flooring CalculatorMaterial with waste allowance, boxes to buy, and costReal Estate
- Fraction CalculatorAdd, subtract, multiply, and divide fractions with automatic simplificationUtility & Math
- Freelancer Tax CalculatorCalculate self-employment tax, income tax, and quarterly estimated paymentsBusiness
- Freight Class CalculatorEstimate NMFC freight class of an LTL shipment from densityTransportation
- Fuel Cost CalculatorGas cost for any trip, plus weekly, monthly, and annual commute costsAutomotive
- Garden Planning CalculatorCalculate plants, seeds, soil, and fertilizer for your gardenLifestyle
- Gift Budget CalculatorPlan gift spending per person against a total holiday budgetLifestyle
- GPA CalculatorCalculate weighted GPA on the 4.0 scale with letter grades and credit hoursUtility & Math
- Grade CalculatorWeighted course grade and the score you need on the finalUtility & Math
- Grain Bin Capacity CalculatorBushel capacity of a round grain bin from diameter and depthAgriculture
- Grams to Ounces ConverterConvert grams to ounces and back — 1 oz = 28.3495 gUtility & Math
- Gravel CalculatorCubic yards and tons of gravel or stone for any area and depthReal Estate
- Hay Feeding CalculatorBales of hay needed to feed a herd over a season, with wasteAgriculture
- Heart Rate Zone CalculatorFind your 5 heart rate training zones using max heart rateHealth & Fitness
- Heat Pump Savings CalculatorHeating savings vs electric resistance, gas, oil, or propaneEnergy
- HELOC CalculatorAvailable home equity credit line, draw and repayment paymentsReal Estate
- Historical Exchange Rate CalculatorExchange rates on any past date back to 1999 (ECB data)Finance
- Home Affordability CalculatorHow much house you can afford using the 28/36 rule with the full payment breakdownFinance
- Home Battery Backup CalculatorBackup runtime during an outage and batteries needed for a targetEnergy
- Home Office CalculatorCalculate home office tax deduction and setup costsLifestyle
- HVAC SEER Savings CalculatorCooling energy and cost saved by upgrading to a higher SEEREnergy
- Ideal Weight CalculatorFind your ideal weight using four clinical formulas (Devine, Hamwi, Robinson, Miller)Health & Fitness
- Inches to Feet ConverterConvert inches to feet and back — 12 in = 1 ftUtility & Math
- Inflation CalculatorDollar value between any two years (1913–2025) with official BLS CPI dataFinance
- Insulation Savings CalculatorAnnual heating cost saved by upgrading a surface's R-valueEnergy
- Irrigation Water CalculatorGallons and acre-feet to apply a water depth over a field, plus costAgriculture
- IV Drip Rate CalculatorCalculate gtt/min, mL/hr flow rate, and infusion time with any drop factorHealth & Fitness
- kg to lbs ConverterConvert kilograms to pounds and back — 1 kg = 2.20462 lbsUtility & Math
- km to Miles ConverterConvert kilometers to miles and back — 1 km = 0.621371 milesUtility & Math
- Landscaping CalculatorCalculate landscaping project quotes with labor, materials, and profitBusiness
- LCM & GCD CalculatorLeast common multiple and greatest common divisor (GCF/HCF)Utility & Math
- Lean Body Mass CalculatorEstimate lean (fat-free) mass and fat mass (Boer formula)Health & Fitness
- LED Savings CalculatorEnergy, money, and CO2 saved by switching bulbs to LEDEnergy
- Legal Fee CalculatorEstimate legal fees by practice area and billing typeBusiness
- Liters to Gallons ConverterConvert liters to US gallons and back — 1 gal = 3.78541 LUtility & Math
- Livestock Feed CalculatorDaily and total feed and cost for a herd from body weightAgriculture
- Loan CalculatorCalculate monthly payments for personal, auto, or business loansFinance
- Loan Comparison CalculatorCompare two loan offers by payment, total cost, and APRFinance
- Logarithm Calculatorlog base b, natural log (ln), log₁₀, and log₂Utility & Math
- Macro CalculatorCalculate protein, carbs, and fat macros based on calories and diet styleHealth & Fitness
- Markup CalculatorPrice from cost and markup, with a markup-to-margin reference tableBusiness
- Medical Unit ConverterConvert mcg/mg/g, mL/tsp/tbsp, lb/kg, °C/°F, and electrolyte mg ↔ mEqHealth & Fitness
- Meters to Feet ConverterConvert meters to feet and back — 1 m = 3.28084 ftUtility & Math
- Mileage Reimbursement CalculatorReimbursement at the IRS standard mileage rate or a custom rateTransportation
- Military BAH CalculatorBudget your housing allowance and see the tax-free value of BAHFinance
- Military Time ConverterConvert between 12-hour and 24-hour (military) timeUtility & Math
- ml to oz ConverterConvert milliliters to US fluid ounces and back — 1 fl oz = 29.5735 mlUtility & Math
- Mortgage CalculatorCalculate monthly mortgage payments including taxes and insuranceFinance
- Mortgage Payoff CalculatorHow much sooner you pay off your mortgage, and the interest you save, with extra paymentsFinance
- Mortgage Refinance CalculatorMonthly savings, break-even month, and lifetime savings for any refinanceFinance
- Moving Cost CalculatorEstimate moving costs for local, long-distance, or DIY movesLifestyle
- MPG CalculatorReal gas mileage from a fill-up, with MPG ↔ L/100km conversionsAutomotive
- mph to km/h ConverterConvert miles per hour to km/h and back — 1 mph = 1.60934 km/hUtility & Math
- Mulch CalculatorCubic yards and bags of mulch for garden beds at any depthReal Estate
- Net Worth CalculatorAssets minus debts, with home equity, liquid net worth, and allocationFinance
- Nurse Overtime CalculatorOvertime pay with night, weekend, and charge differentials includedFinance
- Nursing Dose CalculatorCalculate drug dosage volumes, weight-based doses, and IV drip ratesHealth & Fitness
- One-Rep Max Calculator1RM from any set (Epley & Brzycki) with 65-95% training loadsHealth & Fitness
- Overtime Pay CalculatorCalculate time-and-a-half, double time, and annual overtime earningsFinance
- Ovulation CalculatorEstimated ovulation date and fertile window from your cycleHealth & Fitness
- Pace CalculatorSolve running pace, time, or distance with race-time projectionsHealth & Fitness
- Paint CalculatorGallons of paint for any room — walls, ceiling, coats, and costReal Estate
- Parking Cost CalculatorCompare hourly, daily-max, and monthly parking to find the cheapestTransportation
- Party Planning CalculatorEstimate food, drink, ice, and supplies from your guest countLifestyle
- Password GeneratorCreate strong random passwords in your browser with a strength meterUtility & Math
- Percentage CalculatorCalculate percentages, percentage change, and percentage increases or decreasesUtility & Math
- Perimeter CalculatorPerimeter of a rectangle, square, triangle, or circle circumferenceUtility & Math
- Pet Care Cost CalculatorEstimate annual pet care costs for dogs, cats, and other petsLifestyle
- Photography Pricing CalculatorCalculate photography session pricing including editing, travel, and rightsBusiness
- Plant Population CalculatorPlants per acre and seed needed from row and plant spacingAgriculture
- Pounds to Ounces ConverterConvert pounds to ounces and back — 1 lb = 16 ozUtility & Math
- Pregnancy Due Date CalculatorCalculate your due date using LMP, conception date, IVF transfer, or ultrasoundHealth & Fitness
- Prime Factorization CalculatorPrime factors, primality check, and all divisors of a numberUtility & Math
- Probability CalculatorCalculate probability, combinations (nCr), and permutations (nPr)Utility & Math
- Profit Margin CalculatorMargin from cost and revenue, equivalent markup, and target-margin pricingBusiness
- Property Investment CalculatorAnalyze rental property investment with cash flow, cap rate, and ROIReal Estate
- Property Tax CalculatorAnnual and monthly property tax with average rates for all 50 statesReal Estate
- Protein CalculatorDaily protein target by body weight and goal, with per-meal breakdownHealth & Fitness
- Quadratic Equation SolverSolve ax²+bx+c=0 — roots, discriminant, and vertexUtility & Math
- Quarterly Tax CalculatorPenalty-safe 2026 estimated payments with safe harbor rules and due datesBusiness
- Random Number GeneratorGenerate random numbers in any range, with no-repeat and sort optionsUtility & Math
- Ratio CalculatorSimplify ratios, solve proportions, and scale mixturesUtility & Math
- Reading Time CalculatorConvert a word count into reading or speaking time at any paceUtility & Math
- Real Estate Commission CalculatorCalculate agent commissions and seller net proceedsReal Estate
- Recipe ConverterScale any recipe up or down by changing serving sizeLifestyle
- Rent vs Buy CalculatorHonest year-by-year comparison with equity, appreciation, and opportunity costReal Estate
- Rental Cash Flow CalculatorMonthly and annual cash flow plus cash-on-cash return for a rentalReal Estate
- Rental Yield CalculatorCalculate gross and net rental yield for any propertyReal Estate
- Restaurant Profit CalculatorAnalyze restaurant profitability with food cost, labor, and expense ratiosBusiness
- Retirement CalculatorProject your nest egg and see how much more to save for your income goalFinance
- Road Trip Cost CalculatorBudget gas, hotels, food, and activities with a per-person splitAutomotive
- ROI CalculatorSimple and annualized return on investment with all costs includedBusiness
- Roman Numeral ConverterConvert numbers to Roman numerals and back, from 1 to 3,999Utility & Math
- Room Size CalculatorFloor area, volume, AC size, and capacity from room dimensionsLifestyle
- Roth IRA CalculatorTax-free Roth IRA growth to retirement, with 2026 contribution limits and income phase-outFinance
- Rule of 72 CalculatorYears to double your money — the shortcut plus the exact answerFinance
- RV Loan CalculatorMonthly payment, amount financed, and total interest on an RV or camper loanFinance
- Salary ConverterConvert between hourly, weekly, monthly, and annual pay in both directionsFinance
- Sales Tax CalculatorAdd tax, reverse it out of a total, or find the rate — with 2026 state ratesFinance
- Savings Goal CalculatorFind out how much to save each month to reach your goalFinance
- Scholarship & Net Cost CalculatorNet college cost after scholarships, grants, and family fundsFinance
- Scientific CalculatorFull-featured scientific calculator with trig, log, and advanced functionsUtility & Math
- Scientific Notation ConverterConvert numbers to scientific, E, and engineering notationUtility & Math
- Service Pricing CalculatorCalculate minimum viable rates and project pricing for service businessesBusiness
- Simple Interest CalculatorCalculate simple interest using SI = P × r × tFinance
- Sleep Cycle CalculatorIdeal bedtimes and wake-up times on 90-minute sleep cyclesHealth & Fitness
- Slope CalculatorSlope, line equation, distance, and midpoint from two pointsUtility & Math
- Solar Panel CalculatorSystem size, cost after incentives, savings, and payback from your billEnergy
- Speed CalculatorSolve for speed, distance, or time using Distance = Speed × TimeUtility & Math
- Square Feet to Square Meters ConverterConvert sq ft to sq m and back — 1 sq ft = 0.0929 sq mUtility & Math
- Square Footage CalculatorTotal area across rooms in sq ft and m², with cost per square footReal Estate
- Square Root CalculatorSquare root, cube root, or nth root with simplified radicalUtility & Math
- Standard Deviation CalculatorSample and population standard deviation, variance, and mean from dataUtility & Math
- Statistics CalculatorCalculate mean, median, mode, standard deviation, variance, and moreUtility & Math
- Stock Average CalculatorAverage cost per share, break-even, and gain across purchasesFinance
- Stone to Pounds ConverterConvert stone to pounds and back — 1 stone = 14 lbsUtility & Math
- Student Loan CalculatorCalculate student loan payments and compare repayment plansFinance
- Study Time CalculatorHow many hours a day to study before an exam, and if it's realisticUtility & Math
- Take-Home Pay CalculatorHourly or salary to net paycheck with 2026 federal tax brackets and FICAFinance
- Target Heart Rate CalculatorFind your 5 training heart rate zones using the Karvonen methodHealth & Fitness
- TDEE CalculatorTotal daily energy expenditure and calorie targets by activity levelHealth & Fitness
- Teacher Pension CalculatorEstimate your defined-benefit pension from years, multiplier, and final average salaryFinance
- Test Score CalculatorPercentage, letter grade, and how many you can miss for a targetUtility & Math
- Time CalculatorAdd, subtract, and compare time durations and find time differencesUtility & Math
- Time Card CalculatorClock in/out times to total hours, overtime split, and payFinance
- Time Zone ConverterConvert time between world zones with automatic daylight savingUtility & Math
- Tip CalculatorCalculate tip amount and split the bill between multiple peopleFinance
- Travel Cost CalculatorEstimate total trip costs including flights, hotel, food, and activitiesLifestyle
- Triangle CalculatorSolve any triangle using SSS, SAS, or AAS with angles and areaUtility & Math
- Truck Driver Pay CalculatorGross pay from cents-per-mile, stops, detention, and per diemTransportation
- Trucking Cost Per Mile CalculatorOwner-operator cost per mile, break-even rate, and profitTransportation
- Unit ConverterConvert length, weight, temperature, volume, area, speed, and time unitsUtility & Math
- Vehicle Maintenance Cost CalculatorEstimated annual car upkeep from mileage, age, and vehicle typeAutomotive
- VO2 Max CalculatorEstimate cardio fitness (VO₂ max) from resting heart rateHealth & Fitness
- Volume CalculatorCalculate volume of cubes, cylinders, spheres, cones, and moreUtility & Math
- Waist-to-Height Ratio CalculatorWaist ÷ height health-risk ratio — a simple BMI alternativeHealth & Fitness
- Waist-to-Hip Ratio CalculatorWHR and WHO cardiovascular risk classification for men and womenHealth & Fitness
- Water Intake CalculatorCalculate daily water needs based on weight, activity, and climateHealth & Fitness
- Web Design CalculatorEstimate web design project costs by type, pages, and complexityBusiness
- Wedding Budget CalculatorBreak down your wedding budget by venue, catering, photography, and moreLifestyle
- Wedding Vendor CalculatorPrice wedding vendor services by type, duration, and experience levelLifestyle
- Word CounterCount words, characters, sentences, and paragraphs with reading timeUtility & Math
Collections
Calculators grouped by the job you're doing, across categories.
Buying a home
From what you can afford to what you'll pay each month.
Growing your money
See what saving and investing add up to over time.
Getting fit
Body measurements, daily energy needs and training targets.
Running a business
Price your work, protect your margin and plan for tax.
Getting out of debt
Build a payoff plan and see how fast it clears.
Planning a wedding
Set the budget, split it across vendors and plan the party.