All Tools

    Discover our complete collection of calculators and converters. Find the perfect tool for any calculation need.

    Engineering & Chemistry Calculators

    Electrical, networking, and science utilities

    Stoichiometry Calculator

    Predict amounts in reactions

    Buffer Solution Calculator

    Calculate buffer pH and changes

    Reaction Kinetics Calculator

    Rate laws and half-lives

    Limiting Reagent Calculator

    Find limiting reactant

    Molecular Weight Calculator

    Calculate molecular mass from formula

    Molarity Calculator

    Solution concentration calculations

    Normality Calculator

    Calculate solution normality

    pH Calculator

    Calculate pH of acids and bases

    pOH Calculator

    Calculate pOH and pH values

    Gas Law Calculator

    PV=nRT and combined gas laws

    Percent Yield Calculator

    Measure reaction efficiency

    Mole Fraction Calculator

    Calculate component ratios

    Dilution Calculator

    C1V1 = C2V2 calculations

    Percent Composition Calculator

    Mass % of elements

    PPM Calculator

    Parts per million concentration

    Theoretical Yield Calculator

    Maximum product yield

    Empirical Formula Calculator

    Formula from elemental analysis

    Voltage Drop Calculator

    Line voltage drop estimate

    Ohms Law Calculator

    Solve V, I, R, P

    Horsepower Calculator

    HP from torque or watts

    IP Subnet Calculator

    CIDR subnet details

    Password Generator

    Strong random passwords

    Bandwidth Calculator

    Transfer time estimate

    Resistor Calculator

    Series/parallel equivalent

    Electricity Calculator

    Power, energy, cost

    BTU Calculator

    Watts to BTU/hr

    Thermodynamics Calculator

    Heat transfer Q = m·c·ΔT

    Relativistic Rocket Calculator

    Time dilation, fuel ratio & Lorentz factor

    Interplanetary Brachistochrone Calculator

    Fastest constant-thrust trajectory between planets

    Expanse Delta-v Calculator

    Epstein Drive interstellar travel times

    Nathan Geffen Space Travel Calculator

    Fuel conversion rate & mass ratio for interstellar travel

    Health & Fitness Calculators

    Health, fitness, and wellness calculation tools

    Daily Vitamin Intake Calculator

    Food-based vitamin intake estimates and recommendations

    Vitamin D Calculator

    Natural vitamin D from food and sunlight

    Vitamin C Calculator

    Natural vitamin C from fruits and vegetables

    Vitamin B12 Calculator

    B12 from animal and fortified foods

    Multivitamin Gap Calculator

    Analyze your diet for nutrient gaps

    Protein Calculator

    Calculate daily protein requirements

    Iron Intake Calculator

    Calculate daily iron needs from food

    Calcium Intake Calculator

    Calculate calcium requirements

    Magnesium Calculator

    Calculate magnesium needs

    Zinc Intake Calculator

    Calculate zinc requirements

    Carbohydrate Calculator

    Calculate daily carb needs

    Calorie Calculator

    Calculate daily caloric needs

    Fat Intake Calculator

    Calculate optimal fat intake

    Macronutrient Calculator

    Calculate optimal macro split

    Water Intake Calculator

    Calculate optimal water intake

    Salt Intake Calculator

    Calculate recommended salt intake

    Sugar Intake Calculator

    Calculate daily sugar limits

    BMI Calculator

    Calculate Body Mass Index

    BMR Calculator

    Basal Metabolic Rate calculator

    Body Fat Calculator

    Estimate body fat percentage

    TDEE Calculator

    Total Daily Energy Expenditure

    Ideal Weight Calculator

    Calculate ideal body weight

    Healthy Weight Calculator

    BMI-based range + 4 formulas

    Overweight Calculator

    Check if weight is above healthy range

    Anorexic BMI Calculator

    Assess underweight BMI ranges

    Pregnancy Weight Gain Calculator

    IOM-based weight gain guidance

    Army Body Fat Calculator

    U.S. Army tape method

    Lean Body Mass Calculator

    Boer/James/Hume formulas

    Calories Burned Calculator

    MET-based energy expenditure

    Heart Rate Calculator

    Karvonen training zones

    Body Type Calculator

    Somatotype estimate

    Weight Loss Calculator

    Timeline from deficit

    BAC Calculator

    Blood alcohol estimate

    Weight Watcher Points Calculator

    Calculate WW daily & weekly points

    Macro Calculator

    Calculate protein, carbs, fats

    Pace Calculator

    Calculate running pace & splits

    One Rep Max Calculator

    Calculate 1RM with 7 formulas

    Conception Calculator

    Estimate conception & due dates

    Pregnancy Conception Calculator

    Calculate conception window

    GFR Calculator

    Kidney function (CKD-EPI)

    Body Surface Area Calculator

    BSA for medical dosing (5 formulas)

    Education Calculators

    Academic planning, grading, and student budgeting tools

    Grade Calculator

    Compute overall grade

    GPA Calculator

    Calculate GPA from grades

    Final Exam / Required Grade

    Score needed on final

    Weighted Grade Calculator

    Combine category weights

    CGPA Calculator

    Cumulative GPA

    Course Average Calculator

    Average of items

    Credit Hour Calculator

    Estimate credits

    Study Time Planner

    Distribute study hours

    Class Schedule Hours Calculator

    Total contact hours

    Tuition Cost Calculator

    Estimate term costs

    Student Loan Repayment Calculator

    Payment, interest, total

    Textbook Budget Calculator

    Sum textbook costs

    Percentage-to-Letter Grade Converter

    Map % to letters

    SAT/ACT to Percentile Converter

    Estimate percentile

    Marks Normalization (Curve)

    Normalize scores

    Attendance Percentage Calculator

    % attended of held

    Class Participation Calculator

    Participation contribution

    Grade Average Calculator

    Calculate your academic grade average or GPA

    Math & Statistics Calculators

    Advanced mathematical and statistical calculations

    Scientific Calculator

    Advanced scientific calculations

    Basic Calculator

    Simple arithmetic operations

    Average Calculator

    Calculate mean of numbers

    Fraction Calculator

    Fraction operations and simplification

    Mean Median Mode

    Central tendency measures

    Standard Deviation Calculator

    Statistical spread calculation

    Statistics Calculator

    Comprehensive statistical analysis

    Probability Calculator

    Calculate probabilities and odds

    Confidence Interval Calculator

    Statistical confidence intervals

    Random Number Generator

    Generate random numbers

    Percent Error Calculator

    Calculate percentage errors

    Half-Life Calculator

    Radioactive decay calculations

    Slope Calculator

    Calculate line slope

    Z-score Calculator

    Standard score calculations

    Ratio Calculator

    Calculate and simplify ratios

    Circle Calculator

    Circle area, circumference, diameter

    Pythagorean Theorem Calculator

    Right triangle calculations

    Root Calculator

    Square roots, cube roots, nth roots

    Greatest Common Factor

    Find GCF of numbers

    Rounding Calculator

    Round numbers to specified precision

    Scientific Notation Calculator

    Convert to scientific notation

    Prime Factorization Calculator

    Find prime factors

    Triangle Calculator

    Triangle area, perimeter, angles

    Number Sequence Calculator

    Arithmetic and geometric sequences

    Exponent Calculator

    Power and exponent calculations

    Quadratic Formula Calculator

    Solve quadratic equations

    Log Calculator

    Logarithm calculations

    Sample Size Calculator

    Statistical sample size

    Permutation and Combination

    Calculate P(n,r) and C(n,r)

    Distance Calculator

    Calculate distance between points

    Surface Area Calculator

    3D shape surface areas

    Right Triangle Calculator

    Right triangle solver

    Least Common Multiple

    Find LCM of numbers

    Factor Calculator

    Find all factors of a number

    Matrix Calculator

    Matrix operations and calculations

    Big Number Calculator

    Handle very large numbers

    Common Factor Calculator

    Find common factors

    Long Division Calculator

    Step-by-step long division

    P-value Calculator

    Statistical significance testing

    Perimeter Calculator

    Calculate perimeter of rectangles and squares

    Equation Solver

    Solve simple linear equations

    Algebra Calculator

    Evaluate algebraic expressions

    Financial Calculators

    Financial planning and business calculation tools

    Percentage Calculator

    Calculate percentages easily

    Sales Tax Calculator

    Calculate sales tax and totals

    Margin Calculator

    Calculate profit margins

    Paypal Fee Calculator

    Calculate PayPal transaction fees

    Discount Calculator

    Calculate discounts and savings

    Earnings Per Share Calculator

    Calculate EPS for stocks

    CPM Calculator

    Cost per thousand impressions

    Loan To Value Calculator

    Calculate LTV ratio

    GST Calculator

    Calculate GST/VAT tax

    Loan Calculator

    Calculate loan payments

    Salary Calculator

    Calculate net salary

    Investment Calculator

    Calculate investment returns

    Compound Interest Calculator

    Calculate compound interest

    Mortgage Calculator

    Calculate mortgage payments

    EMI Calculator

    Calculate loan EMI/repayment

    Retirement / 401(k) Calculator

    Calculate retirement savings

    Tip Calculator

    Calculate tips and split bills

    ROI Calculator

    Calculate return on investment

    Break-Even Point Calculator

    Calculate business break-even point

    Savings Goal Calculator

    Calculate savings timeline

    Currency Inflation Calculator

    Calculate inflation impact

    GDP Calculator

    Calculate Gross Domestic Product

    Fuel Cost Calculator

    Calculate fuel costs for trips

    Auto Loan Calculator

    Calculate car loan payments

    Interest Calculator

    Calculate simple interest

    Payment Calculator

    Calculate loan payments

    Amortization Calculator

    Generate amortization schedule

    Finance Calculator

    Time value of money calculations

    Mortgage Payoff Calculator

    Calculate early mortgage payoff

    Income Tax Calculator

    Calculate federal income tax

    Interest Rate Calculator

    Calculate required interest rate

    House Affordability Calculator

    How much house can you afford

    Rent Calculator

    Calculate affordable rent

    Marriage Tax Calculator

    Marriage tax penalty or bonus

    Estate Tax Calculator

    Calculate federal estate tax

    Pension Calculator

    Calculate pension benefits

    Social Security Calculator

    Estimate Social Security benefits

    Annuity Calculator

    Calculate annuity values

    Annuity Payout Calculator

    Calculate annuity payouts

    Credit Card Calculator

    Calculate credit card payoff

    Credit Cards Payoff Calculator

    Multiple credit card payoff strategy

    Debt Payoff Calculator

    Calculate debt elimination

    Debt Consolidation Calculator

    Compare debt consolidation options

    Repayment Calculator

    Calculate loan repayment terms

    Student Loan Calculator

    Calculate student loan payments

    College Cost Calculator

    Calculate future college costs

    Simple Interest Calculator

    Calculate simple interest

    Auto Lease Calculator

    Calculate auto lease payments

    Depreciation Calculator

    Calculate asset depreciation

    Average Return Calculator

    Calculate investment returns

    Business Loan Calculator

    Calculate business loan payments

    Debt-to-Income Ratio Calculator

    Calculate DTI ratio

    Real Estate Calculator

    Calculate property costs

    Take-Home-Paycheck Calculator

    Calculate net pay after taxes

    Personal Loan Calculator

    Calculate personal loan payments

    Boat Loan Calculator

    Calculate boat financing

    Lease Calculator

    Calculate lease payments

    CD Calculator

    Certificate of deposit calculator

    Bond Calculator

    Calculate bond prices and yields

    Roth IRA Calculator

    Calculate Roth IRA growth

    IRA Calculator

    Traditional and Roth IRA calculator

    RMD Calculator

    Required minimum distributions

    VAT Calculator

    Value added tax calculator

    Cash Back or Low Interest Calculator

    Compare credit card options

    Refinance Calculator

    Calculate refinancing benefits

    Budget Calculator

    Create and manage budgets

    Rental Property Calculator

    Calculate rental property returns

    IRR Calculator

    Internal rate of return

    APR Calculator

    Annual percentage rate calculator

    FHA Loan Calculator

    FHA mortgage calculator

    VA Mortgage Calculator

    VA loan calculator for veterans

    Down Payment Calculator

    Calculate home down payment

    Rent vs. Buy Calculator

    Compare renting vs buying costs

    Payback Period Calculator

    Calculate investment payback period

    Present Value Calculator

    Calculate present value of future cash

    Future Value Calculator

    Calculate future investment value

    Commission Calculator

    Calculate sales commissions

    UK Mortgage Calculator

    UK mortgage with stamp duty

    Canadian Mortgage Calculator

    Canadian mortgage with CMHC

    Mortgage Amortization Calculator

    Detailed amortization schedule

    Construction & Home Calculators

    Project planning tools for materials and home improvement

    Square Footage Calculator

    Sum area across rooms in ft² or m²

    Stair Calculator

    Risers, treads, run, stringer length

    Tile Calculator

    Tile count, grout spacing, boxes

    Gravel Calculator

    Cubic yards, tons, and bag counts

    Concrete Calculator

    Slab/footing/column cubic yards

    Roofing Calculator

    Roof squares and shingle bundles

    Mulch Calculator

    Yards and 2 cu ft bag estimates

    Paint Calculator

    Wall area and gallons needed

    Home Renovation Budget Calculator

    Itemized budget with tax & contingency

    Automotive & Transportation

    Driving, vehicle performance, and ownership calculators

    Mileage Calculator

    MPG, L/100km, and cost per mile

    Tire Size Calculator

    Compare diameter, revs/mile, speedo diff

    Engine Horsepower Calculator

    HP from torque×RPM, estimate crank HP

    Fuel Cost Calculator

    Trip cost from distance, MPG, price

    Vehicle Loan Calculator

    Monthly payment with tax and term

    Weather & Environment Calculators

    Weather analysis, environmental impact, and climate tools

    Heat Index Calculator

    Feels-like temperature from temp and humidity

    Wind Chill Calculator

    Feels-like temperature from temp and wind

    Dew Point Calculator

    Comfort level from temperature and humidity

    Carbon Footprint Calculator

    CO2 emissions from energy and transportation

    Rainfall and Humidity Calculator

    Volume, weight, and evaporation rates

    Soil Moisture Calculator

    Determine the moisture content of soil for irrigation management

    Rainfall Intensity Calculator

    Estimate rainfall intensity for hydrology and water design applications

    Crop Water Requirement

    Calculate the total water needs of crops based on climate and growth stage

    Irrigation Efficiency Calculator

    Assess irrigation efficiency and reduce water loss in your system

    Soil Infiltration Rate

    Measure how quickly water enters the soil for better irrigation planning

    Water Balance Calculator

    Analyze water input and output to understand balance and sustainability

    Evapotranspiration (ET) Calculator

    Estimate water loss through evaporation and plant transpiration

    Time & Date Calculators

    Time, date, and scheduling helpers

    Age Calculator

    Exact age in years, months, days

    Chronological Age Calculator

    Age as of today (Y-M-D)

    Pregnancy Due Date Calculator

    Estimate due date from LMP

    Due Date Calculator

    Due date from conception date

    Ovulation Calculator

    Fertile window & ovulation

    Period Calculator

    Predict next period

    Date Difference Calculator

    Days/weeks/months/years

    Time Zone Converter

    World clock comparison

    Time Calculator

    Add H:M:S times

    Time Duration Calculator

    Duration between date-times

    Hours Calculator

    Work hours minus breaks

    Time Card Calculator

    Sum weekly timesheet

    Day Counter

    Count days between dates

    Day of the Week Calculator

    Weekday for any date

    Sleep Calculator

    Wake time by sleep cycles

    Embeddable Calculators

    Free calculators to embed in your website

    Embeddable Carbon Footprint Calculator

    Calculate environmental impact

    Embeddable Dew Point Calculator

    Calculate dew point and comfort level

    Embeddable Bra Size Calculator

    Calculate accurate bra sizes

    Embeddable Love Calculator

    Calculate love compatibility

    Embeddable Molarity Calculator

    Calculate solution concentration

    Embeddable Electricity Calculator

    Calculate power usage and costs

    Embeddable Molecular Weight Calculator

    Calculate molecular mass from formula

    Embeddable Scientific Calculator

    Advanced mathematical calculations

    Embeddable Basic Calculator

    Simple arithmetic calculations

    Embeddable Percentage Calculator

    Calculate percentages and changes

    Embeddable Grade Calculator

    Add a simple Grade Calculator to your website

    Embeddable GPA Calculator

    Add our free GPA Calculator to your website

    Miscellaneous Calculators

    Various specialized calculators for different purposes

    Volume Calculator

    3D shapes: cube, cylinder, sphere, cone, pyramid

    Area Calculator

    2D shapes: rectangle, circle, triangle, parallelogram

    Speed Calculator

    Distance, time, velocity conversions

    Golf Handicap Calculator

    Scores, course rating, slope rating

    Dice Roller

    Virtual dice with different types and modifiers

    Bra Size Calculator

    Band and bust measurements for sizing

    Love Calculator

    Compatibility percentage from names

    Density Calculator

    Mass, volume, density relationships

    Weight Calculator

    BMI, ideal weight, healthy range

    Penis Size Calculator

    Compare your erect length & girth to global averages and see your percentile

    Vagina Size Calculator

    Find out how your aroused vaginal length & width compare to scientific studies

    Sex Calculator

    Compatibility score, calories burned, pleasure rating + fun sex facts

    Orgasm Timing Calculator

    Estimate climax timing, improve control, and learn tips for better sexual endurance

    Unit Converters

    Convert between different units of measurement

    General Unit Converter

    Convert between multiple units

    Temperature Converter

    Convert Celsius, Fahrenheit, Kelvin

    Length Converter

    Convert meters, feet, inches, miles

    Weight Converter

    Convert kilograms, pounds, ounces

    Volume Converter

    Convert liters, gallons, cups

    Time Converter

    Convert seconds, minutes, hours, days

    Power Converter

    Convert watts, horsepower, BTU/hr

    Speed Converter

    Convert mph, km/h, m/s

    Area Converter

    Convert square meters, acres, hectares

    Voltage Converter

    Convert volts, millivolts, kilovolts

    Data Converter

    Convert bytes, KB, MB, GB, TB

    Torque Converter

    Convert Nm, lb-ft, kg-m

    Pressure Converter

    Convert PSI, bar, pascal, atm

    Energy Converter

    Convert joules, calories, kWh

    Fuel Efficiency Converter

    Convert mpg, L/100km

    Data Transfer Rate Converter

    Convert kbps, Mbps, Gbps

    Frequency Converter

    Convert Hz, kHz, MHz, GHz

    Angle Converter

    Convert degrees, radians, grads

    Currency Converter

    Convert world currencies

    Force Converter

    Convert newtons, pound-force

    Illuminance Converter

    Convert lux, foot-candles

    Sound Level Converter

    Convert decibels, sones

    Height Converter

    Convert feet/inches, cm, meters

    Mass Converter

    Convert kg, g, lb, oz

    Shoe Size Converter

    Convert US, EU, UK shoe sizes

    Quantum Calculators

    Quantum computing tools — probability, gates, Bloch sphere, cryptography, and more

    Quantum Probability Calculator

    Qubit measurement probabilities

    Quantum Gate Simulator

    Build circuits with H, X, Y, Z gates

    Bloch Sphere Visualizer

    Interactive 3D qubit visualization

    Quantum Random Number Generator

    Quantum-style random numbers

    Quantum Cryptography Calculator

    Quantum vs classical encryption

    Quantum vs Classical Speed

    Compare quantum & classical speedups

    Antimatter Calculators

    Antimatter physics tools — annihilation energy, blast yield, fuel, cost, and particle pairs

    Antimatter Energy Calculator

    E=mc² for matter–antimatter annihilation

    Antimatter Explosion Calculator

    Blast radius and TNT/megaton yield

    Antimatter Fuel Calculator

    Photon-rocket propellant for star travel

    Antimatter vs Nuclear Calculator

    Compare with fission, fusion, gasoline

    Antimatter Cost Calculator

    Production cost of antimatter

    Antimatter Relativity Tool

    Time dilation & relativistic energy

    Particle–Antiparticle Pair Calculator

    Electron/positron, proton/antiproton & more

    Free Binary Converter Tools

    Convert between binary, text, hexadecimal, decimal and ASCII formats

    Text to Binary

    Convert text to binary format

    Binary to Text

    Convert binary back to text

    Binary to HEX

    Convert binary to hexadecimal

    HEX to Binary

    Convert hexadecimal to binary

    Decimal to Binary

    Convert decimal to binary format

    Binary to Decimal

    Convert binary to decimal

    Binary to ASCII

    Convert binary to ASCII characters

    ASCII to Binary

    Convert ASCII to binary format

    Decimal to HEX

    Convert decimal to hexadecimal

    HEX to Decimal

    Convert hexadecimal to decimal

    Binary Calculator

    Perform arithmetic on binary numbers

    Binary Decoder

    Decode binary to multiple formats

    Text to ASCII

    Convert text to ASCII values

    ASCII to Text

    Convert ASCII values to text

    HEX to Text

    Convert hexadecimal to text

    Octal Converter

    Convert between octal and decimal

    HEX Octal Converter

    Convert between hex and octal

    Binary File Viewer

    View binary content of files

    Roman Numeral Converter

    Convert Roman numerals

    Unix Timestamp Converter

    Convert Unix timestamps

    HEX Calculator

    Perform hex calculations

    URL Encoder

    Encode and decode URLs

    Base64 Encoder

    Encode/decode Base64 format

    Unicode Encoder

    Convert text to Unicode

    MD5 Generator

    Generate MD5 hash from text

    SHA256 Generator

    Generate SHA-256 hash

    IP Calculator

    Calculate IP address details

    Color Converter

    Convert between color formats