Everyday

How much paint a room needs, allowing for doors and windows

Work out the bricks and mortar a wall needs, for a single or double skin wall

Estimate how much yarn a project needs by garment type and size, and how many skeins to buy

Paste raw SMTP headers and get structured JSON

Work out the CO2e of a regular commute by transport mode, per week and per year, using UK DEFRA conversion factors

Convert text to binary, hexadecimal or decimal codes per character, and back again

Add glitchy combining diacritics to any text

Words per minute and accuracy over a timed passage

Work out how much grass seed a lawn needs, for a new lawn or overseeding, and how many bags to buy

Daily calorie burn from height, weight, age and activity

Scale ingredients up or down into amounts you can measure

Create a GDPR compliance statement for your website

Convert HTML or plain text to Microsoft Teams Markdown or Adaptive

Work out tank volume, water weight and a rough stocking guide from tank dimensions

Generate usernames by combining word lists and a number, cut to fit a maximum length

Look up file extensions and their content types

Grade point average on the 4.0 scale from courses and credits

Time something with lap splits, started and stopped from the keyboard

Check a bag against an airline weight allowance, see how much is spare or over, and the excess fee at a given rate per kilogram

Check whether a trailer or caravan is legal and safe to tow from the kerb weight, gross train weight, towball limit and trailer weight, against the noseweight limit and the 85% guideline

How many packs of flooring a room needs, including waste

Work out the volume of concrete needed for a slab, footing or column, in cubic metres and bags

Work out the finished size of a cross stitch design from its stitch count and fabric count, and how much fabric to cut

Build SPF DNS TXT records for your domain

Estimate the CO2e of a flight from its distance and cabin class, using UK DEFRA conversion factors with and without radiative forcing

Compare price per unit across differently sized packs to see which one is better value

Flip text upside down using Unicode characters

Click when the colour changes, over five attempts

Work out the timber, soil and rough cost for building a raised bed of a given size

What four clinical formulas say your weight should be

Celsius, Fahrenheit, gas mark and fan oven settings

Create copyright headers for your project

Convert Markdown-style text to mIRC color codes

Work out a dog or cat's age in human years using the AVMA growth curve, a rough guide and not veterinary advice

Flip any number of coins and see the full sequence, the heads and tails counts, and the longest run

Look up named entities, characters, and numeric codes

What you need on the final exam to hit your target grade

Count down to zero with presets and an alert when it lands

Convert a clothing size between UK, US, EU and international (XS to XXXL) for womenswear or menswear, tops or bottoms, from any one of them

Work out a car value year by year from the purchase price and an annual depreciation rate, with the value today, at a chosen year, and the total lost

Soil, compost or mulch for a bed, in litres and bags

Work out how many plasterboard sheets, screws and how much joint compound a room needs

Work out how many stitches to cast on and rows to knit for a target size, from a gauge swatch

Create responsive HTML email templates

Estimate how many trees it would take to absorb a given amount of CO2, and roughly how long that takes, using a widely cited UK rule of thumb

Work out how much a trip costs in fuel from the distance, consumption and fuel price

Convert plain text to Unicode styled characters

Work out the expected harvest window from a sowing date and the days to maturity

Split a calorie target into protein, carbohydrate and fat

Dough hydration in baker's percentages, starter included

Create website disclaimers

Convert Markdown to Telegram HTML or MarkdownV2 format

Compare a pet's current weight against its ideal weight, a rough guide and not veterinary advice

Roll any number of dice of any size with a modifier, using D&D notation like 3d6+2

Search and browse 60+ common emojis by name or category

Estimate revision hours needed per subject from exam dates and how confident you feel, using a simple stated heuristic

Work and break cycles with a round counter

Work out the total cost of a trip from nights, daily spend by category, flights and a contingency, per person and in total, with a daily allowance left over once the fixed costs are taken out

Work out the cost of heating a home from daily kWh use and a unit rate, per day, month and year, plus what one degree on the thermostat costs

Work out the posts, rails and panels for a fence run, with the post spacing this gives you

Work out how many beads a design needs from its grid size and coverage, and how many packs to buy

Parse named, quoted, and parenthesized email address formats

Estimate a yearly household carbon footprint from home energy, car travel, diet and flights, using UK DEFRA conversion factors

Build a truth table for a boolean expression using AND, OR, NOT, XOR and brackets

Convert English text to Pig Latin

Work out when to sow seeds indoors, from the last frost date and the number of weeks before it

Five training zones from your age and resting heart rate

Alcohol by volume from original and final gravity

Create ToS for your website

Estimate daily food for a dog or cat from weight, age and activity, a rough guide and not veterinary advice

Pick a set number of names from a list, with or without putting each one back

Look up ISO 639-1 and ISO 639-2 codes for 55+ languages

Format one reference in APA, MLA, Harvard and Chicago style from the same author, title and source fields

Several named counters you can click up and down

Convert a shoe size between UK, US, EU and centimetres for men, women or children, from any one of them

Work out annual generation from an array size, orientation and tilt, and the payback period from install cost, export rate and how much of the power is used in the home

Work out how much grout a tiled area needs from the tile size and the joint width

Work out fabric needed for a pattern from piece size and count, allowing for fabric width, nap and a print repeat

Paste a plain-text email and get Markdown

Estimate household water use per person per day and where it typically goes, against the UK average

Work out what an appliance costs to run from its wattage, hours a day and the price per unit

Transform plain text to 1337 speak

Work out how much water a bed needs per week, by plant type and weather

Pace per kilometre and mile, and equivalent finish times

Cups and spoons into grams for the ingredient you are using

Create a cookie policy for your website

Generate random strings of a chosen length from a chosen alphabet, for test data or sample IDs

Look up hotkeys for VS Code, Chrome, terminal, and git

Count words, characters and estimated pages in an essay against a target length, with a reading time estimate

Box breathing and 4-7-8 patterns with a visual guide

Build a packing list from trip length, climate and trip type, with clothing quantities worked out from the number of nights

Work out how many washing machine loads a pile of laundry needs from the drum size, and what it costs from energy and water rates

Work out how many rolls of insulation a loft or wall needs, and the U-value improvement

Create professional HTML email signatures

Estimate the CO2e saved by recycling given weights of aluminium, steel, glass, plastic and paper, using WRAP figures

Work out pixel count, aspect ratio, pixel density and a comfortable viewing distance for a display

Replace common English words with matching emoji

Work out how many plants fit a bed at a given spacing, laid out in rows or staggered

Estimate body fat from tape measurements

How long food takes to thaw in the fridge or cold water

Create a privacy policy for your website

Split a list of names into a set number of balanced teams, or into teams of a fixed size

Find ISO 3166 alpha-2, alpha-3, and international dialing codes

Compare buying against renting a textbook across a number of terms, including resale value

Adjustable tempo with an accented downbeat and tap tempo

Look up the plug types, voltage and frequency for a country, and whether an adaptor or a transformer is needed coming from another country

Work out the self storage unit size a list of boxes and furniture needs, in square feet and cubic metres, with the next standard size up

Work out the board feet and cost of a cut list from the dimensions of each piece

Paste your DKIM DNS TXT record and check its format

Work out the annual cost and CO2e of home electricity and gas use, and the effect of changing one of them, using UK DEFRA conversion factors

Build a times table grid from 1 up to a chosen limit

For fun: the Chinese zodiac animal and element for a birth year, with nearby years that share the same animal

Work out how much fertiliser to apply for an area, from its N-P-K ratio and a target nitrogen rate

How much water to drink a day, adjusted for exercise and heat

Internal temperatures for every level of doneness

Pair a list of names so nobody draws themselves, with optional exclusions for couples or families

Look up ISO 4217 codes, symbols, and names for 40+ world currencies

Work out your attendance percentage so far, and how many more sessions you can miss and still hit a target

Look up the handful of phrases worth knowing in a language: please, thank you, hello, how much, where is, and help

Work out a buildings rebuild cost and a contents cover estimate from a floor area, build type and room count, and flag any shortfall against a sum insured

Work out roof pitch in degrees, ratio and percent, and the rafter length

Write a wedding thank you note from the gift, the giver and how formal you want it, with a short and a long variant

For fun: life path, expression and soul urge numbers from a full name and birth date, using the standard Pythagorean letter chart

Work out how much browns to mix with greens by volume to hit a target carbon to nitrogen ratio

A daily protein range for your weight and training

Convert an oven time and temperature to air fryer settings, or an air fryer setting back to an oven one

Draw a set number of unique winning ticket numbers from a numbered raffle

Look up the common Git command for a task, described in plain words rather than git jargon

Work out an overall grade from weighted assessments, and what score is still needed on the rest

Convert a ring size between UK letter, US number, EU and Japanese sizes, with the inside circumference and diameter in millimetres, from any one of them

Work out the boards, joists and fixings a deck needs from its dimensions, board width and gap, with a waste allowance

Work out which skip size a volume of waste needs, in cubic yards and bin bags

Work out final wedding guest numbers from invites sent and typical acceptance rates by guest type, with table count from table size and a catering headcount

For fun: look up a common dream symbol and what dream folklore traditionally says it means

Work out how much lime or sulphur to apply to move soil pH toward a target, by soil type

Estimated due date and trimester dates from the last period

Work out how a recipe scales between two tin sizes by area or volume, with a suggested bake time change

Pick one option from a list, optionally weighting some options more than others

Look up the KeyboardEvent.key, .code and legacy numeric .keyCode for a keyboard key, searchable by any of them

Work out the fabric width and drop a curtain needs from the window size and heading type, with pattern repeat and hem allowed for

Work out stair rise, going and stringer length, and check both against UK Part K

Build a running order for the wedding day from the ceremony time and a chosen shape, with each block start and end time

For fun: the Western star sign for a birth date, with its date range, element and ruling planet

Bedtimes that wake you at the end of a sleep cycle

Pick a dinner from a seed, filtered by how long you have, your diet and what ingredients you already have in

Shuffle a list into a numbered running order, for a batting order, a presentation order or a playlist

Look up the common shell command for a task, described in plain words

Work out how many lumens a room needs from its area and use, how many bulbs that takes, and a colour temperature to match

Work out how many tiles and boxes an area needs, allowing for waste from cuts

Write wedding invitation text from the names, hosts, date and venue, in the standard formal or casual wordings

For fun: a seeded pick from about 30 animals and the trait each traditionally stands for

Estimate blood alcohol concentration from units drunk, body weight, sex and time elapsed using the Widmark formula, against the UK and Scottish drink drive limits

Work out the salt and water for a wet brine, or the salt for a dry brine, from the weight of the meat

Generate random calendar dates between two bounds

Look up an IANA timezone name, its current UTC offset and the current local time, computed live so daylight saving is always correct

Work out how many rolls of wallpaper a room needs, allowing for the pattern repeat

Split a wedding budget across the usual categories from a total and a guest count, with cost per head and the amount left unallocated

For fun: physical, emotional and intellectual biorhythm cycles for a target date, worked out as sine waves from a birth date

Estimate VO2 max from a Cooper 12 minute run, a 1.5 mile run time, resting heart rate, or a race result, rated against age and sex norms

Work out how many jars a batch needs and how altitude changes the processing time or pressure for it

Assign a list of names evenly across a set of named groups

Look up regex syntax by what it matches, plus a handful of common ready-made patterns

Count down the days, weeks and months to a wedding date against today, with the standard planning milestones and whether each one is overdue

For fun: cast one Elder Futhark rune from a seed, with its name, sound and common meaning, upright or reversed

Estimate the fertile window, ovulation date and next period from the last period date and usual cycle length, using the luteal phase method

Work out the coffee and water for a brew ratio and method, scaling from either the coffee amount or the water amount

Enter options and spin to land on one

Look up a CSS unit, what it is relative to, and when to reach for it

Work out how many items a wedding registry needs across price bands, from the guest count and the expected spend per guest

For fun: a fortune cookie message plus six lucky numbers, both derived from a seed

Work out days to adjust after a flight, with a light exposure and sleep shift plan for the days before and after, from the time zones crossed and direction

Work out how many eggs of one size equal the weight of another size, since recipes are usually written for large eggs

Look up an SQL clause or join type, what it does, and a short worked example

Work out cost per head for food, drink and hire from a guest count and a chosen style, with the total cost and the drinks quantities to buy

For fun: a compatibility score between two Western star signs, worked out from how their elements traditionally pair, with the element logic stated plainly

Convert blood glucose between mmol/L and mg/dL, and HbA1c between the IFCC (mmol/mol) and DCCT (percent) units with the estimated average glucose that HbA1c implies

Look up ASCII 0-127 and the printable Latin-1 Supplement (160-255) in decimal, hex, octal and binary

For fun: ask a yes or no question and get one of the 20 classic Magic 8-Ball answers

Work out the NHS blood pressure band for a systolic and diastolic reading, and the reading that would move it into the next band

For fun: draw one, three or ten cards from the full 78 card tarot deck, upright or reversed, with the common meaning of each card

Compare the Du Bois, Mosteller, Haycock and Boyd formulas for body surface area from height and weight

For fun: a daily reading for a star sign and a date, assembled from phrase banks

Build a stretching routine for a target area from the minutes available and your level, warm up first and each hold timed

For fun: a seeded aura colour with its traditional meaning and a hex value, so a swatch can be shown

Work out evenly spaced dose times across your waking hours from how many doses a day you take, plus the gap between doses