CalcWhenEveryday questions, answered the moment you ask
How old, how many words, how long until, what are the chances — the small questions of the day, answered as you type. 44 free tools for dates, text, numbers and luck. No sign-up, and everything runs in your browser: your words and numbers never leave your device.
Most used
Age Calculator
Your exact age in years, months and days — plus total weeks, days and hours.
📆Date Duration Calculator
How many days between two dates — with weeks and an optional business-day count.
🕐Hours Calculator
Hours between two clock times, minus a break — with decimal hours and optional pay.
🎯Days Until Calculator
How many days until a date — a birthday, a deadline, a holiday, the big day.
⏳Countdown Maker
A live countdown to your moment — name it, share the link, watch it tick.
✍️Word Counter
Words, characters, sentences and paragraphs counted live as you type or paste.
📖Reading Time Calculator
How long will this take to read? Paste the text, get minutes and seconds.
🔐Password Generator
Strong random passwords with an honest entropy rating — generated on your device.
🎲Random Number Generator
Random numbers in any range — one at a time or a batch, duplicates optional.
🔳QR Code Generator
Turn any link or text into a real QR code — drawn in your browser, free to save.
🌐Subnet Calculator
IPv4 subnets worked out: network, broadcast, mask, host range and counts.
%Percentage Calculator
What is 20% of 150? What percent is 30 of 200? All three classic questions, one tool.
⌨️Typing Speed Test
A 60-second typing test with live WPM and accuracy — the real formula, no inflated scores.
Date & Time
Age Calculator
Your exact age in years, months and days — plus total weeks, days and hours.
📆Date Duration Calculator
How many days between two dates — with weeks and an optional business-day count.
⏱️Time Duration Calculator
Elapsed time between two date-and-time moments, in days, hours, minutes and seconds.
🕐Hours Calculator
Hours between two clock times, minus a break — with decimal hours and optional pay.
💼Work Hours Calculator
Weekly, monthly and yearly working hours from your daily shift — with optional pay.
🎯Days Until Calculator
How many days until a date — a birthday, a deadline, a holiday, the big day.
⏳Countdown Maker
A live countdown to your moment — name it, share the link, watch it tick.
🌍Time Zone Converter
What time is 9 AM in New York when you are in London? Convert between world zones.
↔️Time Difference Calculator
The gap between two clock times on the same day — hours, minutes and decimal.
🏢Business Days Calculator
Working days between two dates — Monday to Friday, weekends separated out.
🗓️Week Number Calculator
Which week of the year is this date in? ISO week number, day of year and quarter.
📅Day of Week Calculator
What day of the week was — or will be — any date? Births, weddings, history, plans.
➕Date Add Calculator
Add or subtract days, weeks, months or years from any date — deadlines, done for you.
Text & Writing
Word Counter
Words, characters, sentences and paragraphs counted live as you type or paste.
🔢Character Counter
Characters counted against your limit — posts, bios, meta descriptions, forms.
📝Sentence Counter
How many sentences — and how long they run on average. A readability reality-check.
🔤Letter Counter
Letters only — vowels, consonants, digits and spaces separated out.
📖Reading Time Calculator
How long will this take to read? Paste the text, get minutes and seconds.
🎤Speaking Time Calculator
Timing a speech, talk or video script: paste it, see how long it takes to say.
🔠Case Converter
UPPERCASE, lowercase, Title Case, Sentence case, aLtErNaTiNg — one click each.
🧹Remove Duplicate Lines
Paste a list, get it back with duplicate lines removed — first occurrence kept.
🔁Text Reverser
Reverse text three ways: every character, word order, or words within each line.
📊Word Frequency Counter
Which words do you overuse? Ranked word counts with percentages.
Generators & Fun
Password Generator
Strong random passwords with an honest entropy rating — generated on your device.
🎲Random Number Generator
Random numbers in any range — one at a time or a batch, duplicates optional.
🎲Dice Roller
Roll up to 20 dice of any size — d6 for board games, d20 for tabletop, d100 if you dare.
🪙Coin Flip
Flip a coin — or a hundred at once — and let chance settle it.
🔳QR Code Generator
Turn any link or text into a real QR code — drawn in your browser, free to save.
📊Barcode Generator
Real Code 128 barcodes with valid checksums — for inventory, assets and shelf labels.
📄Lorem Ipsum Generator
Placeholder text by the paragraph, sentence or word — for mockups and layouts.
🔀List Randomizer
Shuffle any list into a fair random order — turns, draws, running orders, teams.
🆔UUID Generator
Version 4 UUIDs, one or fifty at a time — properly random, properly formatted.
Numbers & Tech
Roman Numeral Converter
Convert numbers to Roman numerals and back — 1 to 3999, both directions.
💾Binary Converter
Decimal to binary and back — with octal and hexadecimal shown alongside.
🎨Hex Converter
Decimal to hexadecimal and back — colours, memory addresses, colour codes.
🌐Subnet Calculator
IPv4 subnets worked out: network, broadcast, mask, host range and counts.
📈Z-Score Calculator
How many standard deviations from the mean — with the percentile worked out.
⚖️Ratio Calculator
Simplify ratios to lowest terms, or solve a proportion a:b = c:d for the missing value.
%Percentage Calculator
What is 20% of 150? What percent is 30 of 200? All three classic questions, one tool.
📉Percentage Change Calculator
Increase or decrease between two values, as a percentage — prices, scores, growth.
√Square Root Calculator
Square roots to six decimals — plus cube root, the square, and radical simplification.
➗Average Calculator
Mean, median, mode, sum, range and standard deviation from any list of numbers.
🔡Number to Words Converter
Turn 1,250 into “one thousand two hundred fifty” — cheques, contracts, invoices.
⌨️Typing Speed Test
A 60-second typing test with live WPM and accuracy — the real formula, no inflated scores.
Why the working is shown on every page
An answer you cannot check is just an opinion with good formatting. Every tool here prints its method — the calendar rules, the counting rules, the formula — next to the result, and works an example in the open, so the number is never a mystery. Where a question has more than one honest convention (what counts as a word, which days count as business days), the page says which one it uses.