➕ Add / Subtract Days

Add or subtract days, weeks, months, or years from a selected date instantly.

Result

Choose a date, set your operation, then click “Calculate”.

Original Date –
New Date –
Day of Week –
Difference Applied –

Add or Subtract Days from Any Date – Instant Date Calculator

The Add / Subtract Days Calculator from Mr Jungle Book allows you to quickly add or subtract days, weeks, months, or years from any selected date. It's the perfect tool when you need to figure out due dates, project timelines, contract periods, event schedules, or countdown calculations.

This tool works as an all-in-one: add days calculator, subtract days from date tool, date adder, date minus calculator, and future date calculator — 100% free and mobile-friendly.

What This Date Calculator Can Do

You can instantly calculate:

  • Add days to a date (e.g., What is 45 days after today?)
  • Subtract days from a date (e.g., What was 60 days before my birthday?)
  • Add or subtract weeks — automatically converted into days.
  • Add or subtract months or years — with leap years handled correctly.
  • See the new date including the weekday (Monday, Tuesday, etc.).

The calculator performs all adjustments automatically, including differences in month lengths like February or leap years.

How to Use the Add/Subtract Days Calculator

Using the calculator is simple and fast:

  • Select your starting date.
  • Choose whether to Add or Subtract.
  • Enter the number you want to add or remove.
  • Select the unit (Days, Weeks, Months, Years).
  • Click Calculate — and see your new date instantly.

Popular Uses

This calculator is commonly used for:

  • Project deadlines — "What is 90 days from now?"
  • Event planning — "What date is 6 months after this event?"
  • Contract durations — adding months or years to a start date.
  • Work planning & scheduling
  • Medical or pregnancy timelines (EDD date estimation)
  • School semester planning
  • Legal / compliance timelines

Why Use Mr Jungle Book’s Add / Subtract Days Tool?

Our tool stands out because it is:

  • Free to use — no login or signup required.
  • Accurate with leap years and month lengths.
  • Designed with a clean, modern, mobile-friendly interface.
  • Fast and lightweight — results appear instantly.
  • Includes weekday calculation for better clarity.

Whether you need a date calculator, add days tool, subtract date calculator, or future date finder — this tool makes it easy and reliable.