Example
Base now, Add, Weeks 3, Days 2
Result
Exact date and weekday 23 days later
Date & Time
Date Calculator — Add or Subtract Time
Add or subtract years, months, weeks, days, hours, and minutes from a base date-time to get a target moment, weekday, and timestamps. Handy for schedules, slip planning, and release timing.
DateCalculatorTime
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日期时间
Date Calculator
计算结果
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时间戳 (毫秒)
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Unix 时间戳 (秒)
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ISO 8601
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距今
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请先点击“立即计算”
已复制
Use cases
- Find a delivery date 90 days from now
- Compute a moment three weeks and two days ago
- Adjust expiry or job schedule times precisely
How to use
- Pick a base date-time (defaults to now)
- Choose Add or Subtract
- Fill the units you need and review the result, weekday, and timestamps
Example input and output
FAQ
How do weeks and days combine?
One week equals seven days. Values in both fields are converted and added together.
How are month ends and leap years handled?
Math uses the browser Date API, which applies native month-length and leap-year rules.
Tools
Related tools
Continue with another translated tool for a nearby task.
Date Difference Calculator
Date Difference Calculator — Days, Weeks, Months
Calculate the span between two dates in days, weeks, months, hours, and weekdays (Mon–Fri). Parsing runs in the browser for scheduling, event length checks, and release-gap tracking.
Date Duration Calculator
Age Calculator
Age Calculator — Years and Birthday Countdown
Calculate exact age in years, months, and days from a birth date, plus total days lived and days until the next birthday. Optionally set a custom as-of date; everything runs locally in the browser.
Age Date Birthday
Workday Calculator
Workday Calculator — Count and Add Business Days
Count weekdays between two dates, or add N workdays to a start date to find a target. Currently excludes Saturdays and Sundays only—not public holidays—so treat results as a rough schedule estimate.
Workday Scheduling Date