Free Date Calculator, Age Calculator & Business Days Calculator

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.

Calendar days count every day including weekends and holidays. Business days only count Monday through Friday, excluding weekends (and holidays if specified) — commonly used for shipping, legal, and payment deadlines.

DateCalx calculators support any date range, whether you're looking decades into the past or planning years ahead.

Days-based calculators (like Days From Today) count every calendar day individually, including weekends. Months-based calculators (like Months From Today) use calendar-month arithmetic instead, so the result depends on the length of the months in between — a month can be 28 to 31 days. The two won't always land on the same date for the same number: 30 days from today and 1 month from today are close, but not guaranteed to be identical.

Yes. Every calculator on DateCalx has an editable start date field, so you can calculate from any past or future reference date — not just from today. This is useful for measuring from a contract signature date, a shipment date, or any other anchor point instead of the current date.