Mathify library
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Search the complete collection of free tools for money, math, health, dates, conversions, and everyday decisions.
165 calculators available
AI CalculatorSolve any calculation with natural language — AI-powered math, finance, and moreAsk AnythingAI chatbot for math, finance, health, and everyday questionsBasic CalculatorSimple arithmetic operations with memory functionsPercentage CalculatorCalculate percentages, increases, decreases, and percentage changesScientific CalculatorAdvanced mathematical functions and operationsFraction CalculatorAdd, subtract, multiply, and divide fractionsDate CalculatorAdd or subtract days, weeks, months from datesAge CalculatorCalculate exact age in years, months, daysDate DifferenceCalculate time between two datesBMI CalculatorCalculate Body Mass Index and health categoryCalorie CalculatorCalculate daily calorie needs and BMRLoan CalculatorCalculate loan payments and total interestCompound InterestCalculate compound interest and investment growthLength ConverterConvert between meters, feet, inches, and moreWeight ConverterConvert between kg, pounds, ounces, and moreTemperature ConverterConvert between Celsius, Fahrenheit, and KelvinMedication Dosage CalculatorCalculate safe medication dosages by age, weight, and renal function using Clark's Rule, BSA, or Young's RulePeptide Mixing & Reconstitution CalculatorCalculate peptide reconstitution volumes, concentrations, and injection requirements for peptide compoundsIV Drip Rate & Infusion CalculatorCalculate IV drip rates, drops per minute, and infusion duration for medical professionalsDrug Half-Life CalculatorCalculate drug accumulation and elimination over time based on half-lifeHydration CalculatorCalculate daily water intake based on weight, activity level, and climateAdvanced Macro CalculatorCalculate macronutrient targets (protein, carbs, fats) with multiple diet presetsSupplement Dosing CheckerVerify supplement doses against daily recommended values and safe levelsVaccination Schedule PlannerPlan vaccination schedules based on age, health status, and vaccination recommendationsAspect Ratio CalculatorCalculate and scale image/video dimensions while maintaining aspect ratioColor ConverterConvert colors between HEX, RGB, HSL, HSV, and CMYK formatsEsports DPS CalculatorCalculate damage per second and optimal rotations for esports game mechanicsPadel Performance CalculatorTrack and analyze padel tennis performance metrics and rally statisticsSports Betting CalculatorCalculate potential winnings, odds, and kelly criterion for sports betsTraining Load CalculatorCalculate training load and recovery requirements based on RPE and durationTournament Prize Pool CalculatorDistribute and calculate prize pools across tournament placingsGaming PC Power CalculatorCalculate power consumption and monthly electricity costs for gaming PCsFreelance Project PricingCalculate hourly rates and project pricing based on desired annual incomeGig Earnings OptimizerCalculate net earnings from gig work after fees, taxes, and expensesMusic BPM & Timing CalculatorCalculate note durations, bar timing, and tempo for music productionReal Estate Cap Rate AnalyzerAnalyze property investments with cap rate, cash flow, and ROI metricsRental Yield CalculatorCalculate gross and net rental yield, cash flow, and ROI for property investmentsEMI CalculatorCalculate loan EMI with amortization schedule and prepayment analysisBill Split CalculatorSplit restaurant bills and expenses with custom shares, tips, and taxesNet Worth CalculatorCalculate your total net worth by tracking assets and liabilitiesVAT / Sales Tax CalculatorAdd or remove VAT/sales tax and calculate tax-inclusive totalsProbability CalculatorCalculate probability, combinations, permutations, and oddsStatistics CalculatorCalculate mean, median, mode, range, variance, and standard deviationBMI CalculatorCalculate Body Mass Index and health statusCalorie CalculatorCalculate daily calorie needs for weight goalsIdeal Weight CalculatorFind your ideal weight based on multiple formulasProtein CalculatorCalculate daily protein intake requirementsBody Fat CalculatorEstimate body fat percentage using measurementsMacro CalculatorCalculate macronutrient ratios for your goalsOne Rep Max CalculatorCalculate your one rep max and training percentagesWater Intake CalculatorCalculate daily water intake requirementsSleep CalculatorFind the best time to wake up or sleep based on sleep cyclesBedtime CalculatorCalculate ideal bedtimes from your target wake-up timeWake-Up Time CalculatorCalculate ideal wake-up times from your bedtimeOvulation CalculatorTrack your fertile window and next periodHeart Rate ZonesCalculate target heart rate zones for trainingSubscription CalculatorCalculate potential savings from reducing subscription refundsFreelance Rate CalculatorDetermine your ideal hourly rate based on salary goals and expensesSelf-Employment Tax CalculatorEstimate your Social Security and Medicare taxes for 1099 incomeRandom Number GeneratorGenerate random numbers within a specified rangeUUID GeneratorGenerate one or many RFC 4122 v4 UUIDs instantlySIP CalculatorRecurring investment growth with compoundingLumpsum CalculatorOne-time investment growth with compoundingFD / CD CalculatorFixed deposit/CD maturity value with compoundingRD CalculatorRecurring deposit maturity and interestSWP CalculatorSystematic withdrawal longevity and final corpusCAGR CalculatorAnnualized return for a period (start to end value)SIP vs LumpsumCompare outcomes for recurring vs one-time investmentStep-up SIP CalculatorSIP with annual step-up in contributionsTerm Insurance CalculatorEstimate how much life cover your family may needRNOR Status CalculatorEstimate your NR, RNOR, or ROR status using stay-day rulesXIRR CalculatorAnnualized return for irregular cash flowsStock Average PriceCalculate average stock purchase price over multiple buysBrokerage CalculatorFees and breakeven for a tradeMargin CalculatorRequired margin and leverage calculationsInflation CalculatorFuture and present value adjusted for inflationPassword GeneratorGenerate secure passwords with custom rulesDice RollerRoll virtual dice for games and probabilityCoin FlipFlip a fair coin with historySquare Footage CalculatorCalculate area for flooring, painting, and constructionPaint CalculatorEstimate paint needed by area and coatsConcrete CalculatorCalculate concrete volume for slabs, footings, and columnsBrick CalculatorEstimate bricks required and mortar volumeTile CalculatorCalculate tiles, area, and waste for flooring or wallsVelocity CalculatorCalculate speed, velocity, and accelerationOhm's Law CalculatorCalculate voltage, current, resistance, and powerForce CalculatorCalculate force using Newton's second lawFuel Economy CalculatorCalculate MPG and fuel costs for tripsCar Loan CalculatorCalculate auto loan payments and interestCharacter CounterCount characters, words, sentences, and paragraphsCase ConverterConvert text to upper, lower, title or sentence caseBase64 Encoder/DecoderEncode and decode Base64 stringsText CleanerRemove extra spaces and normalize text formattingEmail & URL ExtractorExtract all emails and links from unstructured textTip CalculatorCalculate tips and split bills at restaurantsDaily Compound InterestCompound growth with daily compounding and contributionsMortgage CalculatorCalculate home loan payments with taxes and insuranceRent vs Buy CalculatorCompare the total cost of renting vs. buying a home over timeHome Affordability CalculatorCalculate how much house you can afford based on income and debtsRetirement CalculatorPlan your retirement savings and incomeLayoff Survival CalculatorEstimate your runway, stress-test your cash plan, and get practical next stepsFIRE CalculatorPlan financial independence with inflation-adjusted spending and return assumptionsSolar Panel ROI CalculatorCalculate payback period and long-term savings for solar panelsEV vs Gas Car Cost CalculatorCompare total cost of ownership between electric and gasoline vehiclesCarbon Footprint CalculatorEstimate your annual CO2 emissions and environmental impactGPA CalculatorCalculate your semester or cumulative GPAPregnancy Due Date CalculatorCalculate your estimated due date based on your last periodLife Expectancy CalculatorVisualize your remaining life in years, months, weeks, and days with gender-specific data from 150+ countriesRoth IRA CalculatorProject tax-free retirement savings growth in a Roth IRADebt Payoff CalculatorCompare the avalanche and snowball methods to pay off debt fasterStartup Runway CalculatorCalculate how many months of cash your business has leftPaycheck CalculatorCalculate your take-home pay after federal, state, and FICA taxes.Discount CalculatorCalculate sale price and savingsHours CalculatorCalculate time duration between two timesDog Age CalculatorConvert your dog's age to human years based on size and breedMarkup vs MarginCalculate profit margins and markupsMean, Median, Mode CalculatorCalculate mean, median, mode, range and other statistics for a data setRatio CalculatorSimplify ratios, find equivalent ratios, and solve proportionsVAT / Sales TaxCalculate tax inclusive and exclusive pricesPace CalculatorCalculate running and walking pace, time, or distanceDebt-to-Income CalculatorCalculate front-end and back-end DTI ratios used by mortgage and credit underwritersAPR CalculatorEstimate APR from loan amount, monthly payment, term, and upfront feesRefinance Break-even CalculatorFind how long it takes to recover refinance closing costs through monthly payment savingsSavings Goal CalculatorCalculate the monthly contribution required to reach a future savings targetBreak-even CalculatorCalculate break-even units and revenue from fixed and variable costsLTV/CAC CalculatorEstimate LTV, LTV:CAC ratio, and payback period for subscription businessesBusiness Days CalculatorCount business days and weekend days between two datesWaist-to-Height Ratio CalculatorAssess central adiposity risk using waist circumference relative to heightCurrency Exchange CalculatorConvert amounts using a custom exchange rate and optional conversion fee to estimate net proceeds.Prime Number CalculatorCheck if a number is prime, find primes in a range, or get prime factorizationRoman Numeral ConverterConvert between numbers and Roman numerals (I, V, X, L, C, D, M)Binary & Hex ConverterConvert between Decimal, Binary, and Hexadecimal number systemsUnix Timestamp ConverterConvert Unix timestamps to dates and vice versa with real-time displayGCF & LCM CalculatorCalculate Greatest Common Factor (GCF) and Least Common Multiple (LCM) of numbersDistraction TrackerTrack distractions, count occurrences, and log time spentVoice NotesSpeak into your mic, get a transcript, then enhance it with AI in any tone or styleTyping Speed TestTest your typing speed and accuracy with real-time WPM tracking, analytics, and AI-powered practiceGST CalculatorCalculate Goods and Services Tax (GST) easily, with support for standard slab rates and localized splitting.BMR CalculatorCalculate your Basal Metabolic Rate (BMR) using Mifflin-St Jeor, Revised Harris-Benedict, and Katch-McArdle formulas.AI Token Cost CalculatorEstimate API pricing for popular LLM models like GPT-4o, Claude 3.5 Sonnet, and DeepSeek, with support for batch calls and agent loops.Simple Interest CalculatorCalculate simple interest, future value, and investment growth over timeShoe Size ConverterConvert shoe sizes between US, UK, EU, JP, and actual foot measurementsTime Card CalculatorCalculate daily and weekly work hours, break times, and gross pay with overtime ratesAppliance Energy Cost CalculatorCalculate daily, monthly, and yearly electricity consumption and cost for home appliancesIndia Income Tax CalculatorEstimate Indian income tax under old and new regimes with FY 2024-25 reference deductionsUK Salary CalculatorEstimate UK take-home pay after Income Tax, National Insurance, and student loansSalary to Hourly CalculatorConvert your annual salary into hourly, daily, weekly, bi-weekly, and monthly pay.Gas Mileage CalculatorCalculate your car's MPG, L/100km, and trip fuel cost.Date Duration CalculatorCalculate the days, weeks, months, and years between two dates.Hours Worked CalculatorTrack your weekly hours, overtime, and gross pay in one place.Cubic Feet CalculatorCalculate cubic feet, cubic yards, and cubic meters for shipping, construction, and storage.Calories Burned CalculatorEstimate calories burned for any activity using MET values and your body weight.Age in Days CalculatorFind out exactly how many days, weeks, hours, and minutes you've been alive.Area ConverterConvert between square meters, square feet, acres, hectares, and moreCooking Measurement ConverterConvert between cups, tablespoons, teaspoons, ml, and other cooking measurementsSpeed ConverterConvert between various speed unitsVolume ConverterConvert between various volume unitsTime Zone ConverterConvert time between different time zonesFinal Grade CalculatorCalculate the grade needed on your final exam to achieve your target gradeStudent Loan CalculatorCalculate monthly payments, total interest, and payoff schedule for student loansCredit Card Payoff CalculatorPlan your credit card debt payoff with different payment strategiesDebt Snowball CalculatorCompare debt snowball vs avalanche strategies to pay off debt fasterRent Affordability CalculatorCalculate how much rent you can afford based on your income and expensesQuadratic SolverSolve quadratic equations ax² + bx + c = 0Standard Deviation CalculatorCalculate population and sample standard deviation with variance