Free online tools
Date calculators and unit converters, measured cleanly.
Days between dates, workdays, age, countdown, time zones, length, weight, temperature, area, volume, and speed — free, private, no signup.
Date & time calculators
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Date difference calculator
Calculate days, weeks, and months between two dates online.
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Workdays calculator
Count business days between two dates (Monday–Friday).
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Age calculator
Calculate exact age in years, months, and days from a birth date.
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Countdown calculator
Find how many days until (or since) a target date.
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Time zone converter
Convert local time across major world time zones.
Unit converters
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Length converter
Convert meters, feet, inches, kilometers, and miles instantly.
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Weight converter
Convert kilograms, pounds, ounces, grams, and stone.
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Temperature converter
Convert Celsius, Fahrenheit, and Kelvin online.
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Area converter
Convert square meters, square feet, acres, and hectares.
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Volume converter
Convert liters, gallons, milliliters, and cups.
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Speed converter
Convert km/h, mph, m/s, and knots online.