Calculate date differences, business days, ages, countdowns, weeks, months, years, and future or past dates with free online calculators. Fast, accurate, and easy to use.
Start with the tools people reach for most.
Calculate the exact difference between two dates in years, months, weeks, days, hours, minutes, and seconds. Perfect for finding the number of days between dates.
Calculate your exact age from your birth date in years, months, days, and total days lived. Find your age on any date instantly.
Use this business days calculator to calculate business days between two dates with country-specific public holidays, customizable weekends, and accurate working-day counts. Select the USA, UK, Canada, Australia, or another supported country, exclude public holidays from your business calendar, and see every weekend and national holiday removed from the range.
Calculate a future date by adding days, weeks, months, or years to any date. Find dates from today or any custom date quickly and accurately.
Find the exact date 28 days from today instantly. Perfect for planning events, deadlines, reminders, and schedules.
Explore calculators grouped by purpose.
Free online date calculators to calculate date differences, add or subtract dates, calculate ages, countdowns, weeks, months, years, and more.
Business day and working day calculators to count business days, add working days, and calculate weekdays between dates.
View allFree online time utilities including duration calculators, Unix timestamp converters, leap year tools, week number calculators, and more.
A focused platform for date and time calculations.
Every calculator runs on a dedicated calculation engine built for calendar accuracy.
Clean layouts, readable results, and visual timelines make complex date math simple.
Responsive design and dark mode support keep DateCalx comfortable everywhere.
Everything you need in one reusable calculator experience.
Input fields adapt automatically to each calculator’s requirements.
Primary answers plus breakdowns, summaries, and additional values.
Interactive calendars and timelines highlight the dates that matter.
Copy results, reset inputs, or share via the Web Share API.
Answers to common questions about our calculators.
DateCalx is a free web platform for precise date and time calculations. It helps you answer everyday questions such as how many days fall between two dates, what date is a fixed number of days from today, how old someone is on a specific date, and how many business days separate two deadlines. Each tool runs in your browser with no account required, and results are designed to be fast, readable, and easy to share for planning, paperwork, and personal scheduling.
Yes. Every calculator on DateCalx is free to use with no subscription, trial limit, or sign-up step. You can run as many calculations as you need for work, school, travel, or personal planning. The site is supported as a helpful utility, so you can open a tool, enter your dates, and get an immediate answer without creating an account or installing software.
DateCalx uses a dedicated calendar engine built for real-world date math rather than rough estimates. It accounts for leap years, different month lengths, and business-day rules where relevant, so results stay consistent across edge cases such as February 29, month-end dates, and year boundaries. That makes the tools suitable for deadlines, age checks, contract timelines, and any task where an off-by-one day error would matter.
Yes. DateCalx includes a dedicated 28 Days From Today page that starts from the current date, adds 28 calendar days automatically, and shows the exact result with the day of week and supporting details. It is useful for billing cycles, return windows, medical follow-ups, subscription periods, and event planning when you need a fixed four-week date rather than counting manually on a calendar.
The platform includes core tools for date differences, adding or subtracting days, age calculation, countdowns, business days, and time utilities such as duration, week numbers, leap-year checks, and Unix timestamp conversion. You will also find shortcut pages for common requests like 7, 28, 30, or 90 days from today or days ago. Together they cover most calendar questions for personal, business, and technical use.
Yes. DateCalx is responsive on phones, tablets, and desktops, so the same calculators work whether you are at a desk or checking a date on the go. Forms, results, and navigation adapt to smaller screens without losing functionality, and dark mode keeps the interface comfortable in different lighting. No app download is required—just open the site in your mobile browser and use any tool directly.