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Fresh tools we've just added to our collection
Calculate work hours, overtime, and total pay with this time card calculator. Supports multiple employee entries, break deductions, hourly rates, and lunch breaks.
Calculate the required BTU (British Thermal Units) for heating or cooling a room based on dimensions, insulation, sun exposure, climate zone, and number of occupants.
Roll virtual dice online with customizable number of dice, sides per die, and roll history. Perfect for tabletop games, RPGs, board games, and probability experiments.
Calculate your bra size based on underbust and bust measurements in inches or centimeters. Get band size, cup size, and sister sizes for the perfect fit.
Calculate the amount of concrete needed for slabs, columns, tubes, curbs, and stairs. Estimate volume in cubic yards, cubic feet, and number of concrete bags required.
Calculate bandwidth needs including data unit conversion, download/upload time estimation, website bandwidth requirements, and hosting bandwidth conversion. Supports bits, bytes, and all metric multiples.
Calculate the heat index (feels-like temperature) based on air temperature and relative humidity or dew point. Uses the National Weather Service regression equation for accurate results.
Calculate the amount of gravel needed for your landscaping or construction project. Estimate volume, weight, and cost based on area dimensions, depth, and gravel type.
Estimate the total number of tiles needed to cover a floor, wall, roof, or any surface. Accounts for tile size, gap spacing, box sizes, and pricing.
Calculate tire dimensions from tire code including section width, aspect ratio, sidewall height, and overall diameter. Compare two tires visually.
Calculate golf course handicap from handicap index, slope rating, and course rating. Also compute handicap index from multiple round scores.
Calculate molecular weight and molar mass from chemical formulas. Free online molecular weight calculator for chemistry students and professionals.
Calculate speed, distance, and time with unit conversion. Free online speed calculator for travel planning, physics problems, and everyday calculations.
Calculate mass from density and volume with unit conversion. Free online mass calculator supporting metric and imperial units with real-time results.
Convert shoe sizes between US, UK, EU, Japanese, and Chinese sizing systems for men, women, and kids. Free online shoe size converter with foot length measurement.
Calculate staircase dimensions including number of steps, riser height, tread depth, and stringer length. Free online stair calculator with building code compliance.
Calculate horsepower using force, distance, and time. Free online horsepower calculator with multiple unit support and instant results.
Calculate GDP using the expenditure approach or resource cost-income approach. Free online GDP calculator for economics and macroeconomics.
Calculate square footage of rectangles, circles, triangles, trapezoids and more. Free online square footage calculator with price per square foot option.
Calculate voltage drop in electrical wires based on wire size, material, length, current, and phase type. Free online voltage drop calculator for DC and AC circuits.
Predict a child's adult height using the Khamis-Roche method or mid-parental height. Convert between feet/inches and centimeters.
Add or subtract time values, calculate time from dates, and parse time expressions
Perform long division with step-by-step calculations showing quotient, remainder, and decimal results
Perform arithmetic operations on very large numbers with high precision. Free online big number calculator supporting addition, subtraction, multiplication, division, exponentiation, and more.
Find all positive factors and factor pairs of any number instantly. Free online factor calculator with prime factorization and detailed divisor information.
Calculate the surface area of spheres, cones, cubes, cylinders, rectangular tanks, capsules, spherical caps, conical frustums, ellipsoids, and square pyramids. Free online surface area calculator with instant results.
Calculate distance between two points in 2D, 3D, or on Earth using latitude and longitude. Free online distance calculator.
Calculate confidence intervals and margin of error for your data with customizable confidence levels. Free online statistics calculator.
Calculate permutations (nPr) and combinations (nCr) instantly with step-by-step results. Free online combinatorics calculator.
Compute comprehensive statistics including mean, standard deviation (population and sample), geometric mean, sum, sum of squares, and more with our free online statistics calculator.
Calculate the minimum sample size needed for your surveys and studies with our free online sample size calculator. Also find margin of error with confidence level options.
Calculate arithmetic, geometric, and Fibonacci number sequences with our free online number sequence calculator. Find nth terms, sums, and generate sequences instantly.
Solve any triangle by entering 3 values (sides and/or angles). Compute area, perimeter, median, inradius, circumradius, and all missing sides and angles.
Calculate any circle value from any other value. Enter radius, diameter, circumference, or area and instantly compute all other circle measurements.
Calculate z-scores from raw scores, mean, and standard deviation. Convert between z-scores and probabilities with our free online z-score calculator.
Calculate probabilities of independent events including union, intersection, complement, and exclusive or. Free online probability calculator with instant results.
Calculate mean, median, mode, and range of any data set. Free online statistics calculator with instant results and detailed analysis.
Calculate the area of rectangles, triangles, circles, trapezoids, ellipses, sectors, and parallelograms. Free online area calculator with instant results.
Free online slope calculator for finding the slope, angle, distance, and equation of a line between two points or from a point and slope.
Free online half-life calculator for radioactive decay. Calculate remaining quantity, initial quantity, elapsed time, or half-life from any three values.
Free online volume calculator for spheres, cones, cubes, cylinders, and other 3D shapes. Calculate volume in multiple units instantly.
Calculate Weight Watchers points for any food using SmartPoints, PointsPlus, or Classic formulas. Estimate your daily points target based on personal factors.
Estimate your blood alcohol concentration using the Widmark formula. Calculate BAC based on gender, weight, drinks consumed, and time.
Free online body type calculator. Determine your body shape (hourglass, pear, apple, rectangle) using bust, waist, and hip measurements with waist-hip ratio.
Free online fat intake calculator. Estimate your recommended daily fat intake based on age, gender, weight, height, and activity level with saturated fat limits.
Free online target heart rate calculator. Calculate your training heart rate zones using Karvonen formula, Borg RPE scale, and multiple max heart rate formulas.
Free online calories burned calculator. Estimate calories burned during walking, running, cycling, swimming, and 100+ activities based on duration and body weight.
Calculate your Lean Body Mass (LBM) using Boer, James, Hume, and Peters formulas. Free online LBM calculator for fitness and medical use.
Calculate your body fat percentage using the US Army circumference-based method. Free online Army body fat calculator for soldiers.
Estimate healthy weight gain during pregnancy based on IOM guidelines. Free online pregnancy weight gain calculator with weekly tracking.
Calculate your BMI and check if you are overweight or obese. Free online overweight calculator with age, gender, height, and weight inputs.
Calculate your BMI and check if it falls in the anorexia risk range. Free online anorexic BMI calculator with age, gender, height, and weight inputs.
Calculate your Body Surface Area (BSA) using multiple formulas including Du Bois, Mosteller, Haycock, and more. Free online BSA calculator for medical and fitness use.
Estimate your glomerular filtration rate using MDRD, CKD-EPI, and Mayo Quadratic formulas. Free online GFR calculator.
Estimate your total daily energy expenditure based on BMR and activity level. Free online TDEE calculator.
Estimate your daily protein needs based on age, gender, weight, height, and activity level. Free online protein calculator.
Estimate your one rep maximum based on weight lifted and repetitions. Free online 1RM calculator with Epley, Brzycki, and Lombardi formulas.
Estimate your daily carbohydrate needs based on age, gender, weight, height, and activity level. Free online carb calculator.
Calculate running, walking, and biking pace from time and distance. Free online pace calculator with pace converter, finish time estimator, and multipoint pace tracking.
Estimate your conception date and fertile window based on due date, last menstrual period, or ultrasound. Plan your pregnancy with our accurate conception calculator.
Find exactly what you need — organized, lightweight, and ready to use
Convert comma-separated values into tab-separated values
Check if a number is a palindrome with our free online palindrome validator. Enter any number to instantly verify if it reads the same forwards and backwards.
Generate set-theoretic Von Neumann ordinals for any integer.
Encrypt and decrypt text using various encryption algorithms. Free online encrypt decrypt tool supporting AES, DES, Triple DES, Rabbit, RC4, and more encryption methods.
Estimate monthly payments, total interest, and payoff schedule for student loans.
Random Email Generator
Encode AVIF images to Base64 or data URLs locally
Convert ASCII text to Data URI format with real-time encoding, MIME type selection, and character validation. Free online ASCII to Data URI converter tool.
Display list items in alternating colors online. Free online tool to colorize list items with customizable color palettes for better visual distinction.
Format and beautify Perl code instantly. Free online Perl formatter with proper indentation and syntax highlighting.
Calculate mean, median, mode, and range of any data set. Free online statistics calculator with instant results and detailed analysis.
Convert candela to lux with distance. Calculate illuminance from luminous intensity and distance measurements.
Visualize the given date intervals on a chart.
Convert images to Data URI format online. Encode JPG, PNG, GIF, WebP images as data URLs with MIME type support, CSS integration, HTML embedding, and batch processing capabilities.
Automatically add vendor prefixes to your CSS code for cross-browser compatibility. Free online CSS autoprefixer with customizable browser targets.
Reverse hexadecimal digits instantly with optional 0x prefix support, validation, and one-click copy/download.
Create and manage your grocery shopping list with categories, quantities, and check-off functionality
Generate and visualize the Fibonacci word fractal, a path curve constructed from the binary Fibonacci word using simple turning rules, with customizable iterations, color schemes, and vector exports.
Convert and format dates between different formats like ISO, US, EU, and more. Perfect for date conversion, formatting, and standardization.
Spin the wheel to randomly pick from a list of options. Fun and interactive random picker wheel with confetti effects for decisions, giveaways, and games.
Convert Excel files into structured XML output instantly.
Calculate and display the prime factorization of any number with step-by-step breakdown and detailed analysis
Perform bitwise logical or arithmetic left shift operations on binary sequences with customizable bit width and shift count.
Generate random food ideas, recipes, and meal suggestions with our free online tool
Calculate your next period start date, predicted ovulation day, fertile window, and pregnancy due date based on your last menstrual period.
Text to ASCII Converter
Convert text to ROT13 cipher and back instantly with browser-side character rotation.
Convert Unicode text to raw bytes with multiple encoding options including UTF-8, UTF-16, and UTF-32. View byte details and export results.
Generate and customize beautiful recursive frosty branching ice crystal fractals.
Convert strings to binary and binary to text online. Free bidirectional string to binary converter with real-time conversion. Perfect for encoding, decoding, and learning binary representation.
Domain age checker
Website source code viewer
Instantly detect if a website uses WordPress and identify its version. Our free tool helps developers, marketers, and site owners gather crucial CMS information.
Reveal the full, original URL behind a shortened URL.
Generate user-friendly and search-engine-optimized URL slugs for your website
Grab and download the favicon image of any website
Check the response headers sent by the server
Subtract two matrices of the same dimensions with step-by-step solutions and detailed explanations.
Calculate the transpose of any matrix with our free online Matrix Transpose Calculator. Perfect for linear algebra, mathematics, and engineering applications.
Calculate discrete convolution of two sequences with step-by-step results
Multiply two matrices with step-by-step solutions, dimension validation, and detailed explanations for matrix multiplication operations.
Calculate the inverse of any square matrix with our free online Matrix Inverse Calculator. Perfect for linear algebra, mathematics, and engineering applications.
Calculate the determinant of any square matrix with our free online Matrix Determinant Calculator. Perfect for linear algebra, mathematics, and engineering applications.
Calculate and generate Lucas numbers sequence with customizable parameters. Free online tool for mathematical sequences similar to Fibonacci.
Generate identity matrices of any size with our free online Identity Matrix Generator. Perfect for linear algebra, mathematics education, and matrix operations.
Generate random number matrices with customizable dimensions, value ranges, and formatting options. Perfect for mathematical exercises, data analysis, and educational purposes.
Calculate and generate linear recurrence sequences with custom coefficients and initial values
Add two matrices together with our free online Matrix Addition Calculator. Perfect for linear algebra, mathematics education, and matrix operations.
Generate random vectors with customizable dimensions, value ranges, and formatting options. Perfect for linear algebra, machine learning, and mathematical research.
Exciting new mini-tools we're currently cooking up — stay tuned!
Convert HTML file to JSX online
Download and save Instagram videos locally with our Instagram Reel Downloader. No signup required.
Save thumbnails from any reel
Got questions? We've got answers. Simple details about our online toolbox.
We're constantly expanding our toolbox. If you have a custom mini-tool in mind that would make your daily workflow easier, let us know!
