Date Calculator

Date Calculator

1 Days Between Two Dates (Interval / Age)

Calculate the exact years, months, weeks, and days between any two calendar dates.

Start Date:

End Date:

Include end day (add 1 day to calculation)

Calculated Interval

0Years

0Months

0Weeks

0Days

Total Elapsed Days:--

Total Elapsed Weeks:--

2 Add to or Subtract from a Date

Shift a reference date forward or backward by specific increments of time.

Start Date:

Operation: Add (+) Subtract (-)

Years:

Months:

Weeks:

Days:

Calculate in Business Days only (skips Saturdays & Sundays)

Calculated Target Date

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Note:

• Contractual Milestones: Standard civil contracts specify delivery in "Days" or "Months". Use Section 2 to instantly establish exact calendar dates for construction deadlines.
• The Business Days Filter: Extremely useful when vetting contractor material submittals or processing time extensions (EOTs) that legally exclude weekends and holidays.
• Include End Day Toggle: Accounts for inclusive project periods where both the start and end dates are counted as active working days.