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½ Fraction Calculator Fractions Fraction arithmetic, simplification, comparison, and conversion in one focused tool. sin Scientific Calculator General Full scientific keypad for trig, logs, roots, powers, memory, Ans, and angle modes. % Percentage Calculator Arithmetic Percent of a number, percent share, and increase or decrease in one place. △ Triangle Calculator Geometry SSS, SAS, or base-height triangle solving with side, angle, area, and perimeter results. ◻ Volume Calculator Geometry Cuboid, cube, cylinder, cone, and sphere volume calculator. σ Standard Deviation Calculator Statistics Standard deviation from a pasted number list with sample or population choice. 🎲 Random Number Generator General Random integers or decimals with range, count, and duplicate settings. ↗ Number Sequence Calculator General Sequence pattern finder for next terms and likely rule recognition. ± Percent Error Calculator Arithmetic Percent error from measured and accepted values. xⁿ Exponent Calculator Algebra Base-and-exponent power calculator. 01 Binary Calculator Number Systems Binary-to-decimal, decimal-to-binary, and binary expression calculator. 16 Hex Calculator Number Systems Hex-to-decimal, decimal-to-hex, and hexadecimal expression tool. ½t Half-Life Calculator Science Remaining amount from initial quantity, half-life, and elapsed time. ax² Quadratic Formula Calculator Algebra Quadratic roots from a, b, and c in ax² + bx + c = 0. m Slope Calculator Algebra Slope from two points with line-form details. log Log Calculator Algebra Custom-base logarithm calculator. ▭ Area Calculator Geometry Area calculator for rectangles, triangles, circles, and trapezoids. n Sample Size Calculator Statistics Sample size estimate from confidence level, margin, and expected proportion. P Probability Calculator Statistics Simple, independent, and complement probability calculator. Σx Statistics Calculator Statistics Full descriptive statistics summary from a number list. x̄ Mean, Median, Mode, Range Calculator Statistics Mean, median, mode, and range from a pasted number list. nCr Permutation and Combination Calculator Statistics nPr and nCr calculator for counting problems. z Z-score Calculator Statistics Z-score from value, mean, and standard deviation. CI Confidence Interval Calculator Statistics Confidence interval for a sample mean. a:b Ratio Calculator Arithmetic Ratio simplifier, equivalent ratio solver, and proportion splitter. d Distance Calculator Geometry Coordinate distance and speed-times-time distance in one tool. ◯ Circle Calculator Geometry Radius, diameter, circumference, and area solver for one circle. SA Surface Area Calculator Geometry Surface area for cube, cuboid, cylinder, cone, and sphere. a²+b² Pythagorean Theorem Calculator Geometry Solve the unknown side of a right triangle. ⊿ Right Triangle Calculator Geometry Right triangle solver for two sides or a side-and-angle setup. ⁿ√x Root Calculator Algebra Square root, cube root, and n-th root calculator. LCM Least Common Multiple Calculator Number Theory Least common multiple from multiple integers. GCF Greatest Common Factor Calculator Number Theory Greatest common factor from multiple integers. × Factor Calculator Number Theory Factor list calculator for one integer. ≈ Rounding Calculator Arithmetic Rounding by decimals, place values, or significant figures. [] Matrix Calculator Algebra Matrix addition, subtraction, multiplication, determinant, and inverse. ×10ⁿ Scientific Notation Calculator General Scientific notation conversion in both directions. ∞ Big Number Calculator General Exact arithmetic for very large whole-number expressions. p Prime Factorization Calculator Number Theory Prime factorization for one integer. CF Common Factor Calculator Number Theory Common factors shared by multiple integers. 🧮 Basic Calculator General Basic four-function calculator with expression input. ÷ Long Division Calculator Arithmetic Long division calculator for dividends and divisors. avg Average Calculator Arithmetic Average calculator from a number list. p P-value Calculator Statistics P-value from z, t, or chi-square test statistics.

BMI BMI Calculator Health and Fitness Metric or imperial BMI estimate with weight-status screening ranges. 🔥 Calorie Calculator Health and Fitness Daily calorie estimate for maintenance, loss, or gain using body details and activity level. BF Body Fat Calculator Health and Fitness Body-fat estimate from neck, waist, height, and hip when required. BMR BMR Calculator Health and Fitness Metric or imperial BMR estimate from age, sex, height, and weight. 🥗 Macro Calculator Health and Fitness Macro split estimate from body details, activity, and goal. ⚖️ Ideal Weight Calculator Health and Fitness Reference weight estimate with separate child and adult handling. 🤰 Pregnancy Calculator Health and Fitness Pregnancy timeline estimate from last period or due date. 📈 Pregnancy Weight Gain Calculator Health and Fitness Pregnancy weight-gain range from prepregnancy measurements and current week. 🍼 Pregnancy Conception Calculator Health and Fitness Likely conception-date estimate from common pregnancy dates. 📅 Due Date Calculator Health and Fitness Expected due date from LMP, conception date, or IVF transfer. 🏃 Pace Calculator Health and Fitness Pace, time, and distance solver for walking or running. 🪖 Army Body Fat Calculator Health and Fitness Army tape-test body-fat estimate from age, sex, weight, and abdomen measurement. 🍞 Carbohydrate Calculator Health and Fitness Daily carbohydrate target from body details, activity, and goal. LBM Lean Body Mass Calculator Health and Fitness Lean body mass estimate from weight and body-fat percentage. ❤️ Healthy Weight Calculator Health and Fitness Height-based healthy weight range calculator. 🏋️ Calories Burned Calculator Health and Fitness Calories-burned estimate from weight, exercise intensity, and time. 1RM One Rep Max Calculator Health and Fitness One-rep max estimate from a recent lifting set. 💓 Target Heart Rate Calculator Health and Fitness Target heart-rate zone estimate for moderate and vigorous exercise. 🥩 Protein Calculator Health and Fitness Daily protein target in grams from weight, activity, and goal. 🥑 Fat Intake Calculator Health and Fitness Daily fat-gram estimate from calorie target. TDEE TDEE Calculator Health and Fitness TDEE estimate from body size and activity level. 🌸 Ovulation Calculator Health and Fitness Cycle-based ovulation and fertile-window estimate. 🌱 Conception Calculator Health and Fitness Likely conception-date estimate from due date or cycle timing. 🩸 Period Calculator Health and Fitness Next period and cycle-date estimate from recent period history. 🧪 GFR Calculator Health and Fitness eGFR estimate from creatinine, age, and sex. 🧍 Body Type Calculator Health and Fitness Body-shape profile from common upper- and lower-body measurements. BSA Body Surface Area Calculator Health and Fitness Body surface area estimate from height and weight. 🍷 BAC Calculator Health and Fitness Approximate BAC estimate from drinks, time, sex, and body weight. ⚠️ Anorexic BMI Calculator Health and Fitness BMI estimate with severe-underweight screening warning. WW Weight Watcher Points Calculator Health and Fitness Legacy points-style food estimate from calories, fat, and fiber. 📉 Overweight Calculator Health and Fitness BMI-based overweight screening check from height and weight.

🏠 Mortgage Calculator Finance Mortgage payment estimate with escrow-style housing costs and amortization context. 💳 Loan Calculator Finance Fixed-rate loan payment and amortization estimate from amount, rate, and term. 🚗 Auto Loan Calculator Finance Car-loan payment estimate with trade-in, tax, fees, and payoff summary. % Interest Calculator Finance Simple-interest versus compound-interest growth in one finance tool. PMT Payment Calculator Finance Periodic payment solver for borrowing or for reaching a future savings target. 🌅 Retirement Calculator Finance Retirement projection with current savings, future contributions, and inflation-aware output. 📉 Amortization Calculator Finance Amortization-focused payment schedule for a fixed-rate installment loan. 📈 Investment Calculator Finance Investment growth estimate with compounding and optional recurring additions. 💱 Currency Calculator Finance Currency conversion estimate with optional custom exchange-rate control. 🛒 Inflation Calculator Finance Inflation-based future value and buying-power comparison in one place. FV Finance Calculator Finance Time-value-of-money solver for core finance equations and cash-flow timing questions. 🧾 Mortgage Payoff Calculator Finance Extra-payment mortgage payoff estimate with interest-savings focus. IRS Income Tax Calculator Finance Federal income tax estimate using filing status and current bracket rules. 🧮 Compound Interest Calculator Finance Compound-interest growth estimate with recurring deposits or additions. 💼 Salary Calculator Finance Pay conversion tool for hourly wages, salaries, and regular work schedules. 401K 401K Calculator Finance 401(k) growth estimate with employee savings and employer-match support. APR Interest Rate Calculator Finance Loan-rate solver from borrowed amount, periodic payment, and term length. 🧾 Sales Tax Calculator Finance Sales-tax add-on and reverse-tax calculator for shopping and invoicing. 🏡 House Affordability Calculator Finance Home affordability estimate from income, debt load, and mortgage assumptions. 🐷 Savings Calculator Finance Savings growth estimate from deposits, rate, and time horizon. 🏢 Rent Calculator Finance Rent-cost summary with optional income-ratio context for housing planning. 💍 Marriage Tax Calculator Finance Marriage-bonus or marriage-penalty estimate from federal filing-status comparison. 🏛️ Estate Tax Calculator Finance Federal estate-tax estimate above the exclusion amount. 🪙 Pension Calculator Finance Defined-benefit pension estimate from service, salary, and payout formula. SSA Social Security Calculator Finance Social Security retirement estimate with claim-age adjustment context. 🔁 Annuity Calculator Finance Future annuity value estimate from recurring payments and growth rate. 💸 Annuity Payout Calculator Finance Annuity-withdrawal estimate from starting balance, rate, and payout term. 💳 Credit Card Calculator Finance Credit-card payoff estimate from balance, APR, and monthly payment size. 🧷 Credit Cards Payoff Calculator Finance Combined credit-card payoff estimate for total revolving debt. 📌 Debt Payoff Calculator Finance Debt payoff estimate with payoff time, total outflow, and interest cost. 🪢 Debt Consolidation Calculator Finance Debt-consolidation comparison between current debt structure and a replacement loan. ⏳ Repayment Calculator Finance Repayment-time estimate from balance, rate, and monthly payment. 🎓 Student Loan Calculator Finance Student-loan payment estimate with schedule and total interest context. 🏫 College Cost Calculator Finance Projected future college cost based on today's tuition and expected annual increases. SI Simple Interest Calculator Finance Simple-interest and maturity-value estimate without compounding. CD CD Calculator Finance CD maturity estimate with interest earned over the selected term. 🏦 Bond Calculator Finance Bond return estimate with coupon income, current yield, and approximate yield to maturity. 🧺 Mutual Fund Calculator Finance Mutual-fund growth estimate with contributions and fee impact. Roth Roth IRA Calculator Finance Roth IRA projection with future-value planning for tax-free qualified withdrawals. IRA IRA Calculator Finance Traditional IRA growth estimate with annual contribution planning. RMD RMD Calculator Finance RMD estimate from prior year-end balance and IRS lifetime factors. VAT VAT Calculator Finance VAT add-on and reverse-VAT calculator for invoice and pricing work. 🎁 Cash Back or Low Interest Calculator Finance Cash-rebate versus low-rate financing comparison for major purchases. 🚘 Auto Lease Calculator Finance Vehicle lease-payment estimate from cap cost, residual, and money factor. 📉 Depreciation Calculator Finance Depreciation estimate by method, elapsed time, and residual value assumptions. AVG Average Return Calculator Finance Average-return and CAGR calculator for investment-performance comparison. 🛍️ Margin Calculator Finance Profit-margin and markup calculator for pricing and sales decisions. 🏷️ Discount Calculator Finance Discount-value and final-price calculator for pricing and promotions. 🏢 Business Loan Calculator Finance Business-loan payment estimate with full amortization context. DTI Debt-to-Income Ratio Calculator Finance Monthly DTI estimate from recurring obligations and gross income. 🏗️ Real Estate Calculator Finance Real-estate investment snapshot with NOI and cap-rate style outputs. 💵 Take-Home-Paycheck Calculator Finance Paycheck estimate after federal tax and FICA withholding. 🤝 Personal Loan Calculator Finance Personal-loan payment estimate with full installment schedule. 🚤 Boat Loan Calculator Finance Boat-financing payment estimate with repayment and interest summary. 📄 Lease Calculator Finance General lease-payment estimate for non-auto lease structures and asset financing. 🔄 Refinance Calculator Finance Mortgage-refinance comparison with break-even and payment-change focus. 📊 Budget Calculator Finance Simple monthly budget summary with income, expenses, and savings targets. 🏘️ Rental Property Calculator Finance Rental-property return estimate with cash flow and cap-rate metrics. IRR IRR Calculator Finance IRR estimate from an investment outlay and projected future cash-flow stream. ROI ROI Calculator Finance ROI percentage and profit estimate from cost and ending value. APR APR Calculator Finance APR estimate that reflects loan cash flow and up-front financing costs. FHA FHA Loan Calculator Finance FHA loan-payment estimate with upfront and annual mortgage-insurance costs. VA VA Mortgage Calculator Finance VA mortgage estimate with funding-fee treatment and payment summary. HEL Home Equity Loan Calculator Finance Home-equity loan payment estimate with fixed-rate amortization detail. HELOC HELOC Calculator Finance HELOC estimate with interest-only draw phase and later repayment phase. ⬇️ Down Payment Calculator Finance Down-payment estimate with financed amount and LTV clarity. ⚖️ Rent vs. Buy Calculator Finance Rent-versus-buy comparison using housing cost, time horizon, and ownership assumptions. ⏱️ Payback Period Calculator Finance Payback-period estimate from upfront cost and recurring annual cash flow. PV Present Value Calculator Finance Present-value estimate that turns future dollars into today's equivalent value. FV Future Value Calculator Finance Future-value estimate with compounding and optional recurring additions. 💼 Commission Calculator Finance Commission amount and total compensation estimate from sales value. 🇬🇧 Mortgage Calculator UK Finance UK mortgage-payment estimate from property value, deposit, and borrowing terms. 🇨🇦 Canadian Mortgage Calculator Finance Canadian mortgage-payment estimate with monthly or biweekly repayment options. 📅 Mortgage Amortization Calculator Finance Mortgage-payment and amortization summary with housing-loan context. 🛍️ Percent Off Calculator Finance Percent-off sale-price calculator with savings amount and optional tax.

🎂 Age Calculator Everyday Exact age finder with years, months, days, and total elapsed time. 📅 Date Calculator Everyday Date arithmetic and date-difference calculator in one workflow. ⏰ Time Calculator Everyday Clock-time arithmetic with hour, minute, second, and day-offset output. 🕒 Hours Calculator Everyday Work-hours calculator with break deduction for a single shift. 🎓 GPA Calculator Education Course-grade GPA estimate with optional credit-hour weighting. 📝 Grade Calculator Education Required-final-grade calculator for target course results. 📏 Height Calculator Conversion Height conversion tool across metric and imperial formats. 🧱 Concrete Calculator Construction Concrete volume estimate in cubic feet, cubic yards, and cubic meters. 🌐 IP Subnet Calculator Networking IPv4 subnet breakdown with mask, network, broadcast, and usable range. 👚 Bra Size Calculator Sizing Band-and-cup size starting estimate from two body measurements. 🔐 Password Generator Utilities Random password generator with length and character-type controls. 🎲 Dice Roller Fun Virtual dice roller with custom sides, quantity, and modifier. ⇄ Conversion Calculator Conversion General length conversion across metric and imperial units. ⛽ Fuel Cost Calculator Travel Trip fuel-cost estimate from distance, efficiency, and fuel price. ⚡ Voltage Drop Calculator Electrical Voltage-drop estimate with remaining load voltage output. 🌡️ BTU Calculator HVAC Room BTU estimate for quick cooling-capacity planning. ⬛ Square Footage Calculator Construction Area calculator for rooms, flooring, walls, and simple rectangular spaces. 🗂️ Time Card Calculator Work Time-card total with payable hours and optional hourly-pay estimate. 🌍 Time Zone Calculator Time Time-zone converter for local date, time, and offset changes. ❤️ Love Calculator Fun Fun name-based compatibility score with a lighthearted result. 💹 GDP Calculator Economics GDP-per-capita estimate from total GDP and population size. 🚗 Gas Mileage Calculator Travel Fuel-economy calculator with MPG, km/L, and L/100 km results. 🏎️ Horsepower Calculator Automotive Horsepower estimate from torque and RPM with kilowatt equivalent. 🔧 Engine Horsepower Calculator Automotive Power conversion between horsepower and kilowatts. 🪜 Stair Calculator Construction Stair layout helper with riser count and run estimate. 🟫 Resistor Calculator Electrical Equivalent-resistance calculator for resistor networks. Ω Ohms Law Calculator Electrical Ohm's-law solver for the missing V, I, or R quantity. 🔌 Electricity Calculator Electrical Power, kWh, and electricity-cost estimate from appliance use. 👟 Shoe Size Conversion Sizing Shoe-size conversion across major regional sizing standards. 💵 Tip Calculator Everyday Tip and bill-splitting calculator for dining and service payments. 🛣️ Mileage Calculator Travel Trip mileage summary with optional fuel-cost-per-distance output. 🧪 Density Calculator Science Density solver from mass and volume inputs. ⚖️ Mass Calculator Science Mass solver from density and volume values. 🏋️ Weight Calculator Science Weight-force calculator from mass and gravity. 💨 Speed Calculator Physics Average-speed calculator from trip distance and travel time. 🧫 Molarity Calculator Chemistry Molarity solver for solution concentration in mol/L. ⚛️ Molecular Weight Calculator Chemistry Formula-to-molar-mass calculator for chemistry notation. Ⅻ Roman Numeral Converter Conversion Two-way Roman numeral converter for classical numbering. ⛳ Golf Handicap Calculator Sports Golf handicap estimate with separate modern and legacy modes. 😴 Sleep Calculator Health Sleep-duration and sleep-cycle helper from bedtime and wake time. 🛞 Tire Size Calculator Automotive Tire-dimension calculator from width, aspect ratio, and wheel diameter. 🏠 Roofing Calculator Construction Roof area and roofing-square estimate with waste allowance. 🟦 Tile Calculator Construction Tile-count estimate with waste percentage for floors and walls. 🌿 Mulch Calculator Garden Mulch-volume estimate in cubic feet and cubic yards. 🪨 Gravel Calculator Construction Gravel estimate in cubic volume and approximate tons. 🥶 Wind Chill Calculator Weather Wind-chill estimate from temperature and wind speed. 🥵 Heat Index Calculator Weather Heat-index estimate from temperature and relative humidity. 💧 Dew Point Calculator Weather Dew-point estimate from temperature and humidity. 📡 Bandwidth Calculator Networking Transfer-time estimator from file size and network speed. 🔤 Base64 Encode / Decode Utilities Base64 encoder and decoder for common text-conversion tasks. 🔗 URL Encode / Decode Utilities URL encoding and decoding for query strings and web text. ⏳ Time Duration Calculator Time Date-time duration calculator for full elapsed-time measurement. 📆 Day Counter Time Day-count calculator for inclusive and exclusive calendar spans. 🗓️ Day of the Week Calculator Time Weekday finder for a chosen calendar date. VIN Auto Year Calculator Other VIN model-year lookup for modern 17-character vehicle identification numbers.