Categories
32 collections, from mortgage amortisation to millilitres — every one built on a stated formula.
Food & KitchenRecipe scaling, baking pans, dough formulas and starter feeding, plus a cooked-leftover guideline checker.
Home & EngineeringA shelf deflection estimate under stated support and loading assumptions; not a safe-load rating.
Money & FinanceLoan, interest, investing and business arithmetic using the inputs and assumptions stated on each tool.
Health & FitnessTraining pace, distance and load arithmetic. Read the scope of each tool.
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 ConvertersIngredient conversions with editable weight assumptions. Cup and spoon measurements are estimates.
Electrical & Electronics UnitsElectrical unit conversions with stated factors, formulas and reference values.
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 UnitsBits, bytes, decimal and binary prefixes, with the unit convention shown.
Density & Flow UnitsDensity and volumetric flow conversions for construction, water, laboratory and process work.
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 ConvertersConvert between cities for a chosen date, including daylight saving and calendar-day changes.