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Mortgage CalculatorEstimate your monthly house payment with taxes, insurance and PMIMortgage & HomePercentage CalculatorSolve any percentage question: X% of Y, what percent, % change and moreMath & StatisticsBMI CalculatorFind your body mass index, weight category and healthy weight rangeHealth & BodyAge CalculatorFind your exact age in years, months, days — and your next birthdayDate & TimeCompound Interest CalculatorWatch savings snowball with compound interest and monthly depositsSavings & BankingPaycheck CalculatorSee your take-home pay per paycheck after federal, state and FICA taxesSalary & IncomeLoan CalculatorPayment, total interest and a full amortization schedule for any loanLoans & LendingTip CalculatorWork out the tip, the total and what each person owes in secondsEveryday LifeGPA CalculatorTurn letter grades and credit hours into your semester and overall GPAEducation & GradesCalorie CalculatorFind how many calories to eat to maintain, lose or gain weightNutrition & DietIncome Tax CalculatorEstimate your 2026 or 2025 federal income tax, bracket and effective rateTaxCM to InchesConvert centimeters to inches exactly, plus feet and fractionsUnit Converters
Personal Finance
Mortgages, loans, savings, investing, retirement and taxes.
Mortgage & HomeMortgage payments, affordability, refinancing, home equity and buying costs.86 toolsSavings & BankingCompound interest, CDs, savings goals, APY and banking calculators.49 toolsInvestmentInvestment returns, stocks, dividends, options, bonds and portfolio tools.108 toolsRetirement401(k), IRA, pension, Social Security, FIRE and withdrawal planning.82 toolsDebt & CreditDebt payoff, credit cards, consolidation, credit utilization and interest.36 toolsTaxIncome tax, capital gains, sales tax, VAT, self-employment and property tax.118 toolsBudgeting & PersonalBudgets, net worth, cost of living, bills splitting and spending.45 toolsFinancial PlanningLife insurance needs, college savings, emergency funds and wealth projection.24 toolsCrypto & DeFiCrypto profit, staking, DCA, impermanent loss, mining and gas fees.31 toolsReal Estate InvestingCap rate, cash-on-cash, rental yield, BRRRR, DSCR and flips.52 toolsInsurance & LegalInsurance needs, premiums, settlements, alimony and child support.45 toolsLoans & LendingPersonal loans, APR, amortization, student loans, business loans and interest.44 toolsSalary & IncomeHourly to salary, take-home pay, overtime, raises and income by country.84 toolsGovernment BenefitsSNAP, Medicaid, SSI/SSDI, VA disability, Universal Credit, Canada Child Benefit, Age Pension and other benefit eligibility and payment estimators.33 toolsGold, Metals & JewelryGold and silver value, coin melt value, karat purity, tola and troy ounce conversion, bullion premiums, jewellery pricing and scrap metal.17 tools
Business
Pricing, margins, startup metrics and marketing math.
Business & FreelanceMargins, markup, break-even, pricing, payroll, invoices and freelance rates.77 toolsSaaS & StartupMRR, ARR, churn, LTV, CAC, runway, burn and valuation.43 toolsMarketing & E-commerceROAS, CPM, CTR, conversion rate, marketplace fees and ad spend.78 toolsAccounting & Business TaxFinancial ratios, statements, costing, depreciation and small-business and corporate tax.39 toolsHR & WorkforceEmployer payroll costs, hiring, turnover, pay bands, staffing and employment law entitlements.25 toolsShipping, Inventory & OperationsFreight, pallets, trucking, warehousing, inventory control, manufacturing and quality metrics.43 toolsRestaurant, Hotel & RetailPrime cost, pour cost, menu engineering, RevPAR, sell-through, GMROI and store metrics.21 tools
Health & Fitness
Body metrics, nutrition, training and pregnancy.
Health & BodyBMI, body fat, ideal weight, BMR, blood alcohol, sleep and health metrics.65 toolsFitness & SportsRunning pace, one-rep max, heart rate zones, calories burned and training.71 toolsNutrition & DietCalories, TDEE, macros, protein, water intake, keto and fasting.37 toolsPregnancy & ParentingDue date, ovulation, pregnancy weeks, baby growth and childcare costs.36 toolsClinical CalculatorsValidated medical scores and formulas: CHA2DS2-VASc, GCS, MELD, Wells, ABG, sodium correction and screening questionnaires.74 tools
Math & Science
Math, geometry, statistics, physics and engineering.
Math & StatisticsPercentages, fractions, algebra, statistics, probability and number tools.142 toolsGeometry & ShapesArea, volume, perimeter, triangles, circles and 3D shapes.66 toolsPhysics & ChemistryMotion, force, energy, molarity, gas laws, half-life and more.103 toolsEngineering & ElectricalOhm's law, voltage drop, wire gauge, power, resistors and HVAC.50 toolsStatistics & ProbabilityDescriptive stats, hypothesis tests, regression, distributions, probability and diagnostic test metrics.49 toolsChemistry & BiologyStoichiometry, solutions, equilibrium, thermochemistry, gas laws, genetics and lab calculators.65 toolsElectronics & CircuitsReactance, filters, 555 timers, op-amps, PCB traces, RF, batteries and digital logic.39 toolsAstronomy & SpaceOrbits, rockets, telescopes, star magnitudes, planets and astrophotography.22 tools
Everyday Life
Home projects, cooking, travel, cars, energy and time.
Auto & VehicleCar loans, leasing, fuel, depreciation, EV charging and ownership costs.56 toolsDate & TimeAge, date difference, business days, time zones, countdowns and time math.51 toolsEveryday LifeTips, discounts, unit prices, bill splitting and daily decisions.43 toolsHome Improvement & ConstructionConcrete, paint, flooring, roofing, drywall, tile, decking and fencing.83 toolsCooking & KitchenRecipe scaling, cups to grams, cooking times and baking conversions.45 toolsTravel & TransportTrip fuel cost, travel time, jet lag, luggage and per-diem budgets.28 toolsEnergy & EnvironmentElectricity cost, solar payback, carbon footprint and appliance energy.38 toolsGarden & OutdoorSoil, mulch, grass seed, fertilizer, plant spacing and pools.36 toolsPets & AnimalsDog and cat age, pet food, pregnancy and pet ownership costs.25 toolsPhotography & VideoDepth of field, exposure, ND filters, crop factor, timelapse, timecode and video file size.30 toolsMusic & AudioMetronome, BPM, note frequency, chord transposing, speaker impedance and room acoustics.28 toolsSewing & CraftsFabric yardage, quilting, knitting, yarn, soap and candle making, woodworking and 3D printing.20 toolsGames & SportsPoker odds, Elo ratings, brackets, sports stats, scorekeepers and gear sizing.37 tools
Converters & Utilities
Unit converters, text tools, developer tools and generators.
Unit ConvertersLength, weight, volume, temperature, area, speed, pressure, energy and data.115 toolsText & WritingWord counter, case converter, reading time, text cleanup and formatting.47 toolsDeveloper ToolsBase64, URL encoding, JSON, hashes, UUIDs, colors and number bases.83 toolsRandom & GeneratorsRandom numbers, dice, coin flips, passwords, pickers and generators.29 toolsDesign & ColorColor palettes, shades, contrast, typography scales, print sizing and design generators.19 tools
Education
Grades, GPA, study planning and student finance.
Education & GradesGPA, grade, final exam, weighted average, test scores and study planning.38 toolsTest Scores & AdmissionsScore calculators and converters for LSAT, MCAT, GMAT, GRE, IELTS, TOEFL, PSAT, ASVAB, JEE and other admissions tests.18 toolsCollege Cost & Financial AidCollege cost projections, net price, Pell Grants, education tax credits, RESP, UK student finance and degree ROI.20 toolsStudy & Learning ToolsTyping tests, worksheets, flashcards, citation generator, periodic table, study planners and classroom practice tools.17 tools
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