Date & Time Calculator: Days - Free Download

Whether you're planning a vacation, scheduling a project or simply settling a "how many days until..." question, Date & Time Calculator gives you fast, accurate answers every time. This minimalist date duration calculator finds the exact number of days between two dates, and adds or subtracts time from any date with a single tap.
No more counting squares on a calendar or guessing the math in your head. From everyday planning to precise business scheduling, it's the date and time tool that quietly handles the numbers so you don't have to.

WHAT YOU CAN DO

• Days between dates — calculate the exact gap between any two calendar dates in years, months, weeks, days, hours and minutes.
• Add or subtract time — add or remove years, months, weeks, days, hours and minutes from any date to land on a new one.
• Business days between dates — count only the working days within a range, ideal for project timelines and leave planning.
• Add or subtract workdays — shift a date by a set number of working days, with customizable settings for your week.

WHY YOU'LL LOVE DATE & TIME CALCULATOR

• Precise results — accurate down to the minute, every single time.
• Workday-aware — handle business days separately from calendar days.
• Include start date — toggle whether the first day counts in your total.
• Flexible settings — tailor every calculation to the way you work.
• Clean and instant — get your answer the moment you enter the dates.
• Works offline — no internet connection required.
• Light & dark themes — a minimalist design that is easy on the eyes.
• 70+ languages — built for users worldwide.

HOW IT WORKS

1. Choose Difference, Add/Subtract or Workdays.
2. Enter your dates, or the amount of time to add or subtract.
3. Get your exact answer instantly — then plan with confidence.

EVERYDAY USES

• Count down the days to a holiday, birthday, wedding or deadline.
• Work out a baby's due date or a pregnancy timeline.
• Track notice periods, contracts, warranties and trial periods.
• Plan project milestones and delivery dates in business days.
• Find out exactly how long until — or since — any event.

PERFECT FOR

• Professionals managing timelines and business days.
• Planners, freelancers and project managers.
• Students and anyone with deadlines to hit.
• Curious minds who just need the number, fast.

WHY A DATE CALCULATOR BEATS A CALENDAR

Flipping through calendar pages is slow and error-prone, especially across months or years, or when you only want to count working days. Date & Time Calculator does the heavy lifting instantly and accurately, so you can trust the result whether you're counting two weeks or two decades.

ACCURATE BUSINESS-DAY MATH

Project managers, HR teams, lawyers and freelancers all live by working days, not just calendar days. With dedicated workday tools, you can count the business days in a range or add and subtract working days from any date — perfect for delivery dates, notice periods and deadlines that skip the weekend.

SIMPLE ENOUGH FOR EVERYDAY, PRECISE ENOUGH FOR WORK

The clean, three-tab design keeps things effortless: pick what you want to calculate, enter your dates, and read your answer. There's nothing to learn and nothing to get in your way.

Date and time calculator: count the days between two dates, add or subtract years, months, weeks, days, hours and minutes, calculate business days and workdays in any range, and find any deadline, duration, due date or anniversary with ease.

Download Date & Time Calculator today and never do calendar math by hand again.