More than one-line conversions
ConvertToolPro combines ordinary unit conversion with the context that changes the answer: working-day length, regional cooking standards, decimal versus binary storage and fractional-inch tolerances.
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Practical Calculators for Real Tasks
Convert units when the answer is simple—and use specialist calculators when schedules, standards, tolerances or regional measurements change the result.
Practical toolLength converterEight metric and imperial units in either direction.Practical toolInches and millimetresExact decimals plus a practical fractional result.Practical toolFractional inchesChoose precision from 1/2 to 1/64 inch.Practical toolWeight converterKilograms, pounds, stone, ounces and grams.Practical toolTemperature converterCelsius, Fahrenheit and Kelvin with offsets.Practical toolSpeed convertermph, km/h, knots, m/s and ft/s.Practical toolCooking and volumeExplicit US, UK and metric measures.Practical toolArea converterSquare units, acres and hectares.Practical toolTime converterSeconds through weeks without month ambiguity.Practical toolHours to daysCalendar days and configurable working days.Practical toolAnnual leave calculatorConvert leave hours using your own schedule.Practical toolWork-hours calculatorShifts, breaks, overtime and estimated pay.Practical toolData storageCorrect GB/GiB and TB/TiB distinctions.Practical toolBatch converterConvert lists and download CSV results.Practical toolCurrency converterLive exchange-rate conversion.Practical toolRoman numeralsConvert in both directions from 1 to 3,999.Practical toolPassword generatorCreate strong passwords locally in the browser.Practical toolRandom number generatorChoose a range and generate values.Practical toolTyping speed testMeasure WPM and accuracy.
Private, immediate calculations
Core calculations run in your browser. There is no account, no paywall and no need to send measurement lists to a server.
Built for real tasks
Use the category converters for quick answers, then move into annual leave, work hours, batch conversion or workshop fractions when the job needs more than a number Google can display directly.