Calculating Is Now Effortless
with Kolay Hesaplasana.

Calculate your Body Mass Index (BMI) from height and weight and see your WHO weight category — underweight, normal, overweight or obese. View your ideal weight range and the difference instantly.

Use the percentage calculator to find a percentage of a number, percentage increase or decrease, and reverse percentage. Work out profit, loss, discount and change rates with clear, instant formulas.

Find your ideal body weight by height and sex using the Hamwi, Devine, Robinson and Miller formulas. Compare all four results against the healthy BMI range and see how far you are from your target.

Use the age calculator to find your exact age in years, months and days from your date of birth. See the total days you have lived, the day of the week you were born and the time left to your next birthday.

Generate strong, random passwords by choosing length, uppercase, lowercase, numbers and symbols. Check strength with a live score. Nothing is sent to a server — created entirely in your browser.

Find the sale price, percent off and total savings, stack multiple discounts and calculate trade discounts with optional VAT. Works in USD, EUR, GBP or TRY for quick, accurate pricing decisions.

Turn a URL, plain text, email or Wi-Fi network into a QR code in seconds. Customise the size and colours, then download as PNG, JPEG, WebP or SVG. A free, secure QR code generator that runs in your browser.

Calculate your basal metabolic rate (BMR) and daily calorie needs (TDEE) from age, sex, height and weight using the Mifflin-St Jeor or Harris-Benedict formula. See how many calories you burn at rest.

Instantly count words, characters with and without spaces, sentences, paragraphs and reading time. Includes keyword density analysis for SEO and runs entirely in your browser — nothing is uploaded.

Find the exact number of days, weeks, months and years between any two dates, or add and subtract days from a date. Leap years are handled automatically and every result appears instantly as you type.

Calculate the arithmetic mean, weighted average (GPA) and moving average of your numbers. The median, mode, standard deviation and range appear automatically for a full statistical summary in one place.

Calculate profit amount, profit margin and markup from your cost and selling price. Find the target price for any margin and see how a discount eats into profit — price products in any currency.

Calculate return on investment (ROI), net profit and payback period for any project. Switch between one-time and periodic monthly cash-flow modes, with results in USD, EUR, GBP or TRY for clear decisions.

Find the greatest common divisor (GCD) and least common multiple (LCM) of up to six numbers. See the Euclidean algorithm steps and prime factorisation so you understand exactly how each result is reached.

Calculate n! for any integer from 0 to 170 with full BigInt precision. View the step-by-step product expansion, total digit count and scientific notation — ideal for probability and combinatorics.

Calculate return on ad spend (ROAS) for Google Ads, Meta Ads and any campaign. Add product cost for net profit, run break-even analysis and use target-ROAS mode to find the spend your goals require.

Find the ideal time to wake up or go to bed based on 90-minute sleep cycles. Choose your age group and sleep-onset delay for personalised bedtime and wake-up times that leave you refreshed, not groggy.

Find your recommended daily water intake from body weight, activity level and special conditions such as pregnancy or hot weather. Results are shown in litres and glasses with simple when-to-drink guidance.

Calculate the area of a square, rectangle, triangle, circle, trapezoid, parallelogram or ellipse. Each shape shows the formula and step-by-step working, so it is perfect for homework, DIY and construction.

Calculate the perimeter of a square, rectangle, triangle, circle, semicircle, ellipse or regular polygon. Every shape displays its formula and step-by-step working for clear, reliable measurements.

Calculate the volume of a cube, rectangular prism, cylinder, sphere, hemisphere, cone or pyramid. Each shape shows the formula and step-by-step working — ideal for school, packaging and engineering tasks.

Calculate the square root (√), cube root (∛) and any nth root with decimal precision. Includes a perfect-square check and result verification, making it ideal for algebra, geometry and quick everyday maths.

Break any number into its prime factors with a step-by-step division table. View the exponent form, the full list of divisors and a prime-number check — perfect for number theory and GCD/LCM problems.

Calculate combinations C(n,r) and permutations P(n,r) with full BigInt precision and step-by-step formulas. Ideal for probability, statistics, lottery odds and any counting problem you need to solve fast.

Calculate any power aⁿ, including negative and fractional exponents, with scientific notation and a clear step-by-step explanation. A handy tool for algebra and compound-growth problems of any size.

Encode or decode text with the Caesar cipher using any shift, or auto-crack all 25 shifts when the key is unknown. ROT13 is supported too — a fun, instant tool for puzzles, learning and light encryption.

Calculate insulin resistance with the HOMA-IR formula from your fasting glucose and fasting insulin. Get an instant risk-category interpretation to discuss with your doctor — for information, not diagnosis.

Split any value by the golden ratio (φ = 1.618) into its larger and smaller parts, or find the whole from a single part. A visual ratio bar makes it perfect for design, photography, layout and architecture.

Create campaign-tracking URLs with utm_source, utm_medium, utm_campaign, utm_term and utm_content. Google Analytics compatible, the link updates live and copies with one click for clean tracking.

Predict your next periods, ovulation day and fertile window from your last period date and average cycle length. View a clear three-month calendar to plan ahead — a simple, private menstrual cycle tracker.

Find your ovulation day and fertile window from your last period date and cycle length. A day-by-day fertile calendar highlights your most fertile days to help with conception planning, all in your browser.

Calculate room, apartment or land area in square metres (m²). Add multiple rooms for the total area, then get a tile and flooring material estimate — ideal for renovation, rent and real-estate planning.

Convert numbers to Roman numerals (1 to 3,999,999 with vinculum support) and back again, and write any date in Roman numerals. A step-by-step breakdown shows exactly how each symbol is formed.

Convert between HEX, RGB and HSL colour codes instantly, pick a colour from an image or eyedropper, and copy CSS-ready values. A fast colour converter for designers and developers, all in your browser.

Pick a random number in any range, generate unique or repeatable lists and lottery numbers, and allow decimals — with crypto-strong randomness. Perfect for draws, sampling and games, all in your browser.

Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC32 hashes for any text or file instantly. Verify file integrity and checksums — everything runs in your browser and no data is ever uploaded.

Find the driving distance and travel time between two cities or addresses, plus the straight-line distance on an interactive map. Plan trips, deliveries and commutes with accurate figures in km and miles.

Calculate your life path, soul urge, personality and destiny numbers from your birth date and full name. Each result includes Pythagorean number meanings and readings to help you explore numerology.

Run a fair raffle or giveaway: pick a random winner from a name list, draw numbers or shuffle entries. The animated draw uses the unbiased Fisher-Yates algorithm so everyone has an equal chance to win.

Create EAN-13, EAN-8, Code 128, Code 39 and QR barcodes, customise the colour, size and text, and download as PNG or SVG. A free barcode generator that runs entirely in your browser with no data uploaded.

Create a click-to-chat wa.me link and QR code from any phone number, add a pre-filled message, and generate WhatsApp links in bulk with CSV export. Ideal for sales, support and marketing campaigns.

Calculate the distance between two GPS coordinates in kilometres and miles using the Haversine formula, and convert between decimal degrees (DD) and degrees-minutes-seconds (DMS) formats with one click.

Convert length, weight, area, volume and temperature units instantly: inch to cm, mile to km, gallon to litre, Fahrenheit to Celsius and over 50 more. A fast metric and imperial converter for everyday use.

Find the time difference between any two cities and compare live local times and working hours across 170+ countries and 600+ cities. Daylight saving is handled automatically for accurate meeting planning.

Find your estimated due date, how many weeks pregnant you are and your current trimester from your last menstrual period. Follow week-by-week baby development and key milestones throughout your pregnancy.

Predict your baby's gender with the traditional Chinese gender calendar, based on the mother's age and the month of conception. A fun, just-for-entertainment tool with no medical or scientific accuracy.

Calculate your body fat percentage with the U.S. Navy method, BMI formula or waist-to-hip ratio. View your category classification along with fat mass and lean mass results to track your fitness over time.

Convert your dog, cat, rabbit, hamster or bird age into human years with breed-size accuracy. See life stages and average lifespan guidance so you can understand and care for your pet at every age.

A free online calculator with standard, scientific (sin, cos, log, sqrt, n!) and programmer (BIN, OCT, HEX) modes. Full keyboard support and operation history make everyday and complex maths quick and easy.

Calculate baby and child height, weight and BMI percentiles using WHO growth standards for ages 0 to 19. Separate charts for boys and girls help you track healthy growth and spot any concerns early.

Convert grams, kilograms, tonnes, pounds, ounces and carats instantly. Find how many kg are in a tonne, convert kg to grams and add up the total weight of several items — a fast, accurate weight converter.

Turn any title or text into a clean, SEO-friendly URL slug with automatic accent removal, lowercase conversion and hyphen (kebab-case) formatting. Ideal for blog posts, product pages and permalinks.

Format messy CSS into clean, readable, indented code or minify it to shrink file size and speed up your site. A handy CSS beautifier and minifier that runs entirely in your browser with no data uploaded.

Format messy JavaScript into clean, readable, indented code or minify it to shrink file size and speed up your site. A handy JS beautifier and minifier that runs in your browser with no data uploaded.

Format messy HTML into clean, readable, indented code or minify it to shrink file size and speed up your site. A handy HTML beautifier and minifier that runs entirely in your browser with no data uploaded.

Turn long links into short, shareable URLs instantly with the is.gd service. Free, with no sign-up, copy with one click and full international-character support — perfect for social media, SMS and QR codes.

Convert images between PNG, JPG, WebP, BMP and SVG formats. Create a transparent PNG, compress images to save space and batch-convert many files at once — all in your browser with nothing ever uploaded.

Find your public IP address, location and ISP, or look up any other IP address. A free IP lookup tool with full IPv4 and IPv6 support that shows your connection details instantly, with no sign-up required.

Check the DNS records of any domain: A, AAAA, MX, NS, TXT, CNAME and SOA, complete with TTL values. Records are looked up live via DNS over HTTPS — ideal for debugging email, hosting and domain setup.

Change text to UPPERCASE, lowercase, Title Case, Sentence case or tOGGLE cASE instantly. A simple online text case converter that works in your browser — perfect for headings, titles and clean copy.

Find all 10 baby mental leaps, fussy and sunny periods from your baby's birth date, with premature corrected-age support. A clear timeline helps you understand developmental jumps and difficult weeks.

Convert text to Morse code and decode Morse back to text, with audio playback and a full International Morse Code chart. A fast, two-way Morse translator for learning, signalling and puzzles.

Add VAT to a net price, remove VAT from a gross price, and find the net amount and tax separately. Use any VAT rate in USD, EUR, GBP or TRY — a fast, accurate VAT calculator for invoices and shopping.

A millisecond-precise online stopwatch and countdown timer in one. Record laps, pause and reset, use keyboard shortcuts and set an audible alarm — perfect for workouts, cooking, study and presentations.

Convert USD, EUR, GBP and 30+ currencies with live exchange rates, an instant inverse rate and a quick-reference table. Ideal for travel budgets, online shopping and forex — no sign-up needed.

Find your daily calorie needs (TDEE), the deficit for weight loss and the calories you burn by activity. A food calorie table of 600+ items helps you plan meals and reach your fitness goals with confidence.

Estimate your blood alcohol concentration (BAC %) from sex, body weight and your drinks using the Widmark formula. See roughly when you will sober up — for information only, never drink and drive.

See the daily, monthly, yearly and lifetime cost of smoking, and exactly how much you would save by quitting. Enter your own price per pack in USD, EUR, GBP or TRY for a clear, motivating financial picture.

See the monthly, yearly and lifetime cost of drinking, and how much you would save by cutting back or quitting. Enter your own prices in USD, EUR, GBP or TRY for a clear, eye-opening financial picture.

Find your sun sign and rising sign (ascendant) from your birth date, time and place. View zodiac dates, elements and personality traits to understand how others see you and what drives you, all in seconds.

Generate your free natal birth chart from your date, time and place of birth. See the sign and degree of all 10 planets, your rising sign, and the distribution of elements and modalities in one report.

Measure your download speed, upload speed, ping and jitter instantly from your browser. This free bandwidth test is powered by Cloudflare and needs no app — check your home or office connection in seconds.

Merge, split and compress PDF files entirely in your browser. Combine several PDFs, extract individual pages or reduce PDF size — nothing is uploaded, so your documents stay completely private.

Extract text from images and photos with free online OCR. Convert a picture, screenshot or scanned document into editable text right in your browser, with support for 8 languages and no file ever uploaded.

Estimate the fuel cost of any trip from distance, fuel consumption and price per litre. Compare gasoline, diesel and LPG, see cost per kilometre and check your driving range — budget journeys with ease.

Calculate your weighted course grade from midterm and final scores, with the resulting letter grade and GPA points. Find out exactly what grade you need on the final exam to pass or hit your target.

Convert PDF to Word, JPG, PNG and Excel, or turn images into a PDF. Rotate pages and convert DOCX and XLSX to PDF online, all in your browser — nothing is uploaded, so your files stay fully private.

Calculate your new salary after a percentage or fixed pay raise, find the raise rate between two amounts, and combine several cumulative raises. See the exact increase in take-home figures before and after.

Validate and parse any IBAN with the MOD97 algorithm. Check the country code, check digits, structure and length to catch typos before a transfer — with bank-name lookup included for Turkish IBANs.

Work out your monthly payment, total repayment and total interest from the loan amount, interest rate and term. View a full amortization schedule for mortgage, car and personal loans in USD, EUR or GBP.

Work out product cost with VAT and markup, the break-even point from your fixed and variable costs, or a project cost with overhead and risk margin. Supports USD, EUR and GBP for clear, confident pricing.

Convert a Gregorian date to the Hijri (Islamic) calendar or a Hijri date back to Gregorian. See today's Hijri date and the dates of upcoming Islamic days like Ramadan, Eid al-Fitr and Eid al-Adha.

Estimate your total missed prayer (qada) debt from the date you started praying regularly. Fajr, Dhuhr, Asr, Maghrib and Isha are shown separately, with a realistic daily make-up plan to clear them.

Estimate your total missed Ramadan fast (qada) debt and build a realistic weekly or monthly make-up plan with an estimated finish date. A simple way to track and clear your remaining fasting obligations.

Count Subhanallah, Alhamdulillah, Allahu Akbar and any dhikr with this free digital tasbih. Set a target, enable tap sound and vibration, and track your history — your counts are saved in your browser.

Measure inflation between any two dates and see how the value of money changes over time, using official CPI data for USD, EUR and GBP from the BLS, Eurostat and ONS. Understand real purchasing power fast.

Calculate 2.5% zakat on your cash, gold, silver and trade goods against the nisab threshold. Live metal prices are built in, and the result is shown in USD, EUR, GBP, SAR and more for accurate giving.

Value gram gold, sovereign coins and bullion by karat — 22K, 24K, 18K and 14K — using live spot prices. See the worth of your gold in USD, EUR, GBP or TRY for buying, selling and savings decisions.

Check whether two words are anagrams and generate every letter arrangement (permutation) of a word, alongside a letter-frequency table. A handy tool for word games, puzzles and wordplay of all kinds.

Find all the words you can make from your letters — a perfect Scrabble and word-game helper — then search text for patterns and analyse word frequency. Three word tools in one, running in your browser.

Discover a random Quran verse or supplication (dua) with its Arabic text and English translation. Includes a verse of the day and a supplication of the day for a daily moment of reflection and remembrance.

Convert numeric grades into letter grades (A, B, C and more) on a 4.0 scale, and calculate your weighted GPA from your courses, grades and credit hours. Plan a semester or your whole program in seconds.