Fast online calculators and everyday tools.
WeUtils.com keeps common calculations simple: no sign-up, no clutter, just quick answers on any device.
Your saved tools
Finance
Currency Converter
Convert currencies with live exchange rates. Free, fast and clutter-free converter.
Discount Calculator
Calculate final price and savings after applying single or multiple discounts instantly.
Reverse VAT calculator
Remove VAT from a gross amount and calculate net amount and VAT value instantly.
VAT calculator
Calculate VAT, net amount and gross total instantly.
Tip calculator
Work out the tip and split the total per person instantly.
Loan calculator
Loan payment calculator: work out your monthly payment, total interest and total cost from the amount, rate and term.
Interest rate calculator
Interest rate calculator: find the annual interest rate of a loan from the amount, monthly payment and term. Free, no sign-up.
Compound interest calculator
See how your savings grow with compound interest and monthly contributions.
Mortgage calculator
Estimate your monthly mortgage payment with interest, property tax, insurance and a full amortization chart.
Gross to net salary calculator
Convert a gross salary to net take-home pay after income tax and social security.
Net to gross salary calculator
Work out the gross salary needed for a target net pay after deductions.
Break-even calculator
Work out the break-even point: how many units to sell to cover costs, plus the break-even revenue.
Simple interest calculator
Calculate simple interest with I = P × r × t and the total amount. Free, instant, in your browser.
Profit margin calculator
Calculate profit, profit margin and markup from cost and selling price. Free, instant, in your browser.
ROI calculator
Calculate return on investment (ROI) and net profit from amount invested and final value. Free, instant.
Savings goal calculator
Work out how long it takes to reach a savings goal from your current savings, monthly amount and interest rate.
Salary to hourly calculator
Convert an annual salary to an hourly, weekly and monthly rate from your hours per week. Free and instant.
Debt payoff calculator
See how long to clear a debt or credit card and the total interest, from balance, APR and monthly payment.
NPV & IRR calculator
Calculate net present value (NPV) and internal rate of return (IRR) from an investment and its cash flows.
Retirement savings calculator
Project your retirement savings from your age, current savings, monthly contribution and expected return.
Effective annual rate calculator
Convert a nominal annual rate to the effective annual rate (EAR) for any compounding frequency. Free.
CAGR calculator
Calculate the compound annual growth rate (CAGR) from a beginning value, ending value and number of years.
Date & time
Age calculator
Calculate current age from a date of birth.
Date difference calculator
Calculate days and approximate months between two dates.
Day of the week calculator
Find out what day of the week you were born and your exact age.
Age difference calculator
Work out the exact age gap between two people in years, months and days.
Time zone converter
Convert a time between time zones and see the current time around the world. Plan meetings across countries.
Unix timestamp converter
Convert a Unix timestamp to a date and back, with UTC and ISO output.
Business days calculator
Count the working days (Monday to Friday) between two dates, excluding weekends. Instantly.
Countdown timer
Live countdown to a date and time: days, hours, minutes and seconds. No sign-up.
Duration calculator
Work out how long between two times (even across midnight): hours and minutes. Instantly.
Date calculator (add / subtract)
Add or subtract days, weeks, months or years from a date and get the resulting date. Free and instant.
Online stopwatch
A free online stopwatch with start, pause and reset. Accurate to hundredths of a second, in your browser.
Pomodoro timer
A free online Pomodoro timer: 25-minute work sessions and 5-minute breaks. Runs in your browser, no setup.
Leap year calculator
Check if any year is a leap year and find the next one. Free, instant, in your browser.
Zodiac sign calculator
Find your zodiac (star) sign from your date of birth. Free, instant, in your browser.
Moon phase calculator
Find the moon phase and illumination for any date. Free, instant, in your browser.
Chinese zodiac calculator
Find your Chinese zodiac animal and element from your birth year. Free, instant, in your browser.
Sunrise & sunset calculator
Calculate sunrise, sunset and day length for any latitude, longitude and date. Free, in your browser.
Math
Percentage calculator
Calculate what percentage one number is of another.
Random number generator
Generate random numbers within a range, instantly and locally.
GCD and LCM calculator
Find the GCD and LCM of two or more numbers instantly.
Prime number checker
Check if a number is prime and see its prime factors.
Factorial calculator
Calculate the factorial (n!) of a number, exact for large values.
Binary / decimal / hex converter
Convert numbers between binary, decimal, hexadecimal and octal.
Scientific calculator
Scientific calculator: trigonometry, logarithms, roots, powers, π and e. Type the expression and get the result.
Rule of three calculator
Solve direct and inverse proportions instantly. Enter three values and get the fourth.
Dice roller
Roll dice online: choose how many dice and how many faces (d4, d6, d8, d10, d12, d20, d100).
Flower petal calculator
Find the typical number of petals of common flowers and see how petal counts follow the Fibonacci sequence.
Statistics calculator
Calculate mean, median, mode, range and standard deviation from a list of numbers. Free and instant.
Fraction calculator
Add, subtract, multiply or divide two fractions and get the simplified result plus the decimal. Free and instant.
Logarithm calculator
Calculate the logarithm of a number in any base, plus natural log (ln), log base 10 and log base 2. Free.
Exponent calculator
Raise any base to any power (bⁿ), including negative and decimal exponents. Free, instant, in your browser.
Fibonacci calculator
Generate the Fibonacci sequence up to N terms and see the sum. Big-integer accurate. Free and instant.
Quadratic equation calculator
Solve ax² + bx + c = 0 for real or complex roots, with the discriminant. Free, instant, in your browser.
Probability calculator
Calculate the probability of an event from favourable and total outcomes, as a percentage and decimal. Free.
Scientific notation converter
Convert any number to scientific notation (a × 10ⁿ) and E-notation. Free, instant, in your browser.
Modulo calculator
Calculate a mod b — the remainder and quotient of a division. Free, instant, in your browser.
Matrix determinant calculator
Calculate the determinant of a 2×2 or 3×3 matrix. Free, instant, in your browser.
Percentage change calculator
Calculate the percentage increase or decrease from one value to another. Free, instant, in your browser.
Text
Word Counter
Count words, characters, sentences, paragraphs, and check reading times in real-time.
Case converter
Convert text to uppercase, lowercase, title case or sentence case instantly.
Regex tester
Test regular expressions against your text and see live matches.
Lorem Ipsum generator
Generate Lorem Ipsum placeholder text by paragraphs, instantly and ready to copy. Perfect for mockups and design.
Palindrome checker
Check whether a word or phrase is a palindrome (reads the same backwards), ignoring spaces, case and accents.
Text to speech
Turn text into speech with your browser’s synthesis: pick a voice and language and adjust the speed. Free and local.
Reverse text
Reverse any text instantly — flip the character order. Free, private, runs in your browser.
Remove duplicate lines
Remove duplicate lines from a list, keeping the first occurrence and the original order. Free and private.
Sort lines
Sort a list of lines alphabetically A→Z or Z→A, with natural number ordering. Free, private, in your browser.
Developer
Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 to plain text online and locally.
JSON Formatter
Format, validate, prettify, and minify your JSON data in real-time in your browser.
Password Generator
Generate secure, random passwords with custom length and character sets instantly in your browser.
QR Code Generator
Create custom, downloadable QR codes for URLs, text, Wi-Fi or email instantly.
UUID Generator
Generate single or bulk secure RFC4122 version 4 UUIDs instantly in your browser.
URL encoder / decoder
Encode or decode URLs and query strings (percent-encoding) instantly.
Hash generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes of any text locally.
HTML entity encoder / decoder
Encode text to HTML entities or decode entities to plain text.
Slug generator
Turn any title into a clean URL slug: lowercase, no accents, hyphenated. Instantly in your browser.
Font size converter
Convert font sizes between px, em, rem and pt with a configurable base size. For CSS and design.
CSS minifier
Minify CSS by removing comments and whitespace to shrink the file size. Local and instant.
CSS gradient generator
Create linear CSS gradients from two colors and an angle, with a live preview and code to copy.
What is my screen resolution
Shows your screen resolution, viewport, pixel ratio and color depth for your device.
JWT decoder
Decode a JWT (JSON Web Token) to read its header and payload claims. 100% local — your token never leaves the browser.
CSV to JSON converter
Convert CSV to a JSON array of objects in your browser. The first row becomes the keys. Free and private.
Chmod calculator
Build Unix file permissions with checkboxes and get the chmod octal (e.g. 755) and symbolic (rwxr-xr-x) values.
Morse code translator
Translate text to Morse code and decode Morse back to text, automatically. Free, instant, in your browser.
Text diff
Compare two texts line by line and see what was added or removed. 100% local in your browser.
ASCII table
Full printable ASCII table with decimal, hexadecimal, octal and character values. Free reference.
JSON to CSV converter
Convert a JSON array of objects to CSV in your browser. Keys become the header row. Free and private.
CSS box-shadow generator
Generate CSS box-shadow with a live preview: offset, blur, spread, colour and inset. Copy the code. Free.
CSS border-radius generator
Generate CSS border-radius per corner with a live preview and copy the code. Free, instant, in your browser.
Color palette generator
Generate a palette of tints and shades from any base colour, with hex codes. Free, instant, in your browser.
Markdown to HTML
Convert Markdown to HTML source: headings, bold, italic, code, links and lists. 100% local in your browser.
URL parser
Parse a URL into protocol, host, path, query parameters and fragment. 100% local in your browser.
Color contrast checker
Check the contrast ratio between two colours and whether it passes WCAG AA and AAA. Free, in your browser.
CSS flexbox generator
Generate CSS flexbox layouts with a live preview: direction, justify, align and gap. Copy the code. Free.
Converters
cm to pixels calculator
Calculate how many pixels you need for a final size in cm or inches at any PPI/DPI, with aspect ratio checks for photo printing.
Pixel to cm converter
Convert image pixels to cm, mm or inches using PPI/DPI. Select an image locally to read dimensions without uploading it.
Temperature Converter
Convert temperatures between Celsius, Fahrenheit and Kelvin instantly.
Color converter
Convert colors between HEX, RGB and HSL instantly with a live picker.
Length converter
Length converter (cm, m, inches, feet, miles). online converter.
Weight converter
Weight converter (kg, g, pounds, ounces, stone). online converter.
Volume converter
Volume converter (litres, mL, gallons, cups, pints). online converter.
Speed converter
Speed converter (km/h, mph, m/s, knots). online converter.
Area converter
Area converter (m², ft², acres, hectares). online converter.
Aspect ratio calculator
Work out the aspect ratio (16:9, 4:3…) from a width and height in pixels. Instantly.
Energy converter
Convert energy between joules, kilojoules, calories, kilocalories, watt-hours, kWh and BTU. Instantly.
DPI / PPI calculator
Work out DPI/PPI from pixels and physical size, and check whether the resolution is good enough to print.
Image resize calculator
Work out the new width or height while keeping the image’s aspect ratio, plus the scale in %. Instantly.
Data storage converter
Convert data storage between bits, bytes, KB, MB, GB, TB and the binary KiB, MiB, GiB, TiB. Instantly.
Pressure converter
Convert pressure between pascals, kPa, bar, psi, atm, mmHg and Torr. Instantly, in your browser.
Power converter
Convert power between watts, kilowatts, megawatts, horsepower (hp), metric PS, BTU/h and kcal/h. Instantly.
Angle converter
Convert angles between degrees, radians, gradians, turns, arcminutes and arcseconds. Instantly.
Frequency converter
Convert frequency between hertz, kHz, MHz, GHz and rpm. Instantly, in your browser.
Density converter
Convert density between kg/m³, g/cm³, g/mL, kg/L, lb/ft³ and lb/gal. Instantly, in your browser.
Roman numeral converter
Convert numbers to Roman numerals and back (1–3999). Free, instant, in your browser.
Fuel economy converter
Convert fuel economy between mpg (US), mpg (UK), L/100km and km/L. Free, instant, in your browser.
Download time calculator
Estimate how long a download takes from a file size (MB) and your connection speed (Mbps). Free and instant.
Fuel cost & consumption calculator
Work out your real fuel consumption (L/100km), trip cost and range on a full tank from distance and litres used. Free.
Health
BMI Calculator
Calculate your Body Mass Index (BMI) instantly and check WHO categories.
BMR calculator
Work out your basal metabolic rate (BMR) with the Mifflin-St Jeor formula: the calories you burn at rest.
Daily calorie calculator
Work out the calories you need per day from your metabolism and activity, with goals to maintain, lose or gain weight.
Daily water intake calculator
Work out how much water to drink per day from your weight (litres and glasses). A quick, simple guide.
Pregnancy due date calculator
Work out your estimated due date from your last period (Naegele’s rule), with gestational age and trimester.
Body fat calculator
Estimate body fat percentage with the US Navy method from height, neck and waist. Free, instant, private.
Running pace calculator
Calculate your running pace per km and per mile, plus speed, from distance and time. Free and instant.
One-rep max calculator
Estimate your one-rep max (1RM) from weight and reps, with a percentage training table. Free and instant.
Ideal weight calculator
Estimate your ideal weight (Devine formula) and the healthy weight range for your height. Free and instant.
Heart rate zones calculator
Calculate your max heart rate and the 5 training zones from your age. Free, instant, in your browser.
Sleep calculator
Find the best bedtimes to wake up refreshed, based on 90-minute sleep cycles. Free, instant, in your browser.
Protein intake calculator
Estimate your daily protein needs from your weight and activity level. Free, instant, in your browser.
Body surface area calculator
Calculate body surface area (BSA) with the Mosteller formula from height and weight. Free and instant.
Macro calculator
Calculate daily calories and a protein/carbs/fat macro split from your body and goal. Free and instant.
Creatine dosage calculator
Work out your daily creatine dose from your weight in kg or lb, with loading and maintenance. Free, instant, in your browser.