Everyday tools, right now.
Calcuno Now is a free collection of calculators, unit converters, date tools and text tools. Every tool shows its working, runs in your browser and needs no sign-up.
Last updated · 29 tools, each checked against official sources
Percentages & math View all: Percentages & math
- Percentage CalculatorX% of a number, percent of a total, reverse percentages.
- Percentage Change CalculatorPercentage increase or decrease between two values.
- Average CalculatorMean, median, mode, range and standard deviation.
- Fraction CalculatorAdd, subtract, multiply, divide and simplify fractions.
- Ratio CalculatorSimplify ratios, split a total or solve A:B = C:?
Money & shopping View all: Money & shopping
School & grades View all: School & grades
Unit converters View all: Unit converters
- Length ConverterMetric, imperial and US length and distance units.
- Weight ConverterGrams, kilograms, pounds, ounces, stones and tons.
- Volume ConverterLiters, cups, fluid ounces, pints and gallons (US and UK).
- Temperature ConverterCelsius, Fahrenheit and kelvin.
- Fuel Economy ConverterL/100 km, km/L and US or UK miles per gallon.
- cm to InchesCentimeters ⇄ inches, with feet and inches.
- kg to lbsKilograms ⇄ pounds, with ounces and stones.
- Feet to MetersFeet ⇄ meters, including feet + inches.
- Celsius to Fahrenheit°C ⇄ °F for weather, cooking and fever.
- Area ConverterSquare meters, square feet, acres and hectares.
- Speed Converterkm/h, mph, m/s, knots and feet per second.
Date & time View all: Date & time
- Age CalculatorExact age in years, months and days, and next birthday.
- Days Between DatesDays, weeks and working days between two dates.
- Date CalculatorAdd or subtract days, weeks, months or years.
- Hours Worked CalculatorTimesheet hours with breaks, overnight shifts and pay.
- Time Duration CalculatorAdd or subtract hours and minutes; decimal hours.
Text tools View all: Text tools
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Checked, not guessed
Formulas and conversion factors come from official definitions and standards, and every tool is tested against worked examples. See our methods and sources.
Private by design
Your numbers and text are processed on your device. Nothing you type into a tool is sent to us or stored.
Clear about conventions
Where countries or schools do things differently, such as gallons, cups, weekends or leap-day birthdays, the tool says which rule it uses.
Free, no account
No sign-up, no downloads and no pop-ups.