Categories
42 collections, from mortgage amortisation to millilitres — every one built on a stated formula.
RelationshipsQuantify the beautifully messy dynamics of human connection — from ghosting risk to rebound half-lives.
Psychology & MindPut numbers on the invisible: imposter syndrome, shower arguments, awkward silences, and creative guilt.
Lifestyle & HabitsFrom bed rotting to squeaky shoes — measure the habits and micro-embarrassments of modern life.
Food & KitchenKitchen thermodynamics and food rheology: butter spreadability and the true cost of boiling water.
Home & EngineeringStructural engineering for your living room — starting with the bookshelf that is definitely sagging.
Body & HealthEvidence-flavored anatomy and physiology models, handled with care (and appropriate disclaimers).
Digital LifeGroup chats, browser tabs, notification debt — the physics of your online existence.
Productivity & TimeProcrastination spirals, meeting math and the true cost of “just five more minutes.”
Money & FinanceLoans, mortgages, interest, investing and tax — the arithmetic behind every financial decision.
Health & FitnessBody composition, energy needs, training paces and clinical indices, using the published equations.
Date & TimeAges, date differences, working days, timesheets and durations — calendar arithmetic done properly.
Math & StatisticsPercentages, geometry, algebra, probability and descriptive statistics with the working shown.
Business & MarketingMargins, cash flow, conversion rates, customer value and operations metrics.
Home & ConstructionPaint, tiles, concrete, timber and insulation quantities, with waste allowance and order counts.
Text & Web ToolsWord counts, readability scores, CSS units, colour conversion and file size estimates.
Unit ConvertersEvery common unit pair for length, mass, volume, area, speed, pressure, energy, power and data.
Education & GradesGPA, weighted averages, exam targets and grade curves on a credit-weighted basis.
Garden & OutdoorsSoil, mulch, seed, fertiliser, pool and irrigation quantities for outdoor projects.
Vehicles & FuelFuel economy, trip costs, gearing, depreciation and running cost per mile.
Kitchen ConvertersCups to grams by ingredient, oven temperatures and cooking measures using real densities.
Electrical & Electronics UnitsAmps, volts, ohms, farads, henries and battery capacity, converted exactly.
Science & Lab UnitsRadiation dose, activity, molar concentration, illuminance and luminance.
Industry & Trade UnitsViscosity, mass flow, thermal properties, fabric weight and water hardness.
Networking & Data RateBits, bytes, decimal and binary multiples — the whole Mbps versus MB/s mess.
Length & Area UnitsEvery length and area conversion, from angstroms to parsecs and circular mils to hectares.
Weight & Volume UnitsMass and capacity conversions including troy weight, dry measure, board feet and cubic yards.
Speed & Rotation UnitsSpeed, angle and frequency conversions, from feet per minute to Mach and rpm to radians per second.
Pressure, Force & Torque UnitsPressure, force and torque conversions for engineering, medical and automotive figures.
Energy & Power UnitsEnergy and power conversions covering electricity billing, food energy, HVAC ratings and fuel.
Time UnitsDuration conversions from femtoseconds to millennia, with the calendar caveats stated.
Digital Storage UnitsBytes, bits and the binary prefixes — including why a 1 TB drive shows as 931 GB.
Density & Flow UnitsDensity and volumetric flow conversions for construction, water, laboratory and process work.
Height & Weight ConversionsEvery common height and body-weight figure converted, with the healthy weight band and BMI worked out for each one.
Length & Distance ValuesNamed length and distance conversions — 1 to 100 in centimetres, inches, millimetres, feet, metres, kilometres and miles.
Kitchen & Volume ValuesGrams, ounces, millilitres, litres and gallons at the quantities recipes and fuel figures actually use.
Speed, Area & Pressure ValuesSpeeds, floor areas, tyre pressures and engine outputs at the figures that appear on real signs, plans and placards.
Baking Ingredient WeightsCups, tablespoons and millilitres to grams and ounces for every flour, sugar, starch and fat.
Liquid Ingredient WeightsVolume-to-weight conversions for milk, cream, oils, syrups and sauces.
Spice, Nut & Produce WeightsTeaspoon and cup weights for spices, leaveners, nuts, dried fruit, cheese and berries.
Molar Mass & MolesMolar mass, composition by mass and gram-to-mole arithmetic for the compounds people actually weigh out.
Solutions & ConcentrationMolarity, solution preparation, percentage strength and mg/dL to mmol/L conversion, per compound.
Time Zone ConvertersCity-to-city time conversion that accounts for daylight saving on both sides, with working-hour overlap.