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+ 7 days

Date Calculator

100% Free

Add or subtract years/months/weeks/days from any date — leap-year aware, weekday output, instant. 100% client-side.

Real-time
Client-Side
Leap-aware
Years
Months
Weeks
Days
Result
2026-05-23
Saturday
7 days after 2026-05-16

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  • Responsive design
  • Lightweight & fast
  • No backend required
  • Always up-to-date 
<iframe
  src="https://tools.town/embed/date-calculator/"
  width="100%"
  height="600"
  style="border:none; border-radius:12px;"
  loading="lazy"
  title="Date Calculator">
</iframe>

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How to use

  1. Enter a start date (or use today’s date).
  2. Choose to add or subtract.
  3. Enter the number and select a unit — days, weeks, months, or years.
  4. The result date appears instantly.

When to use

Useful for deadline tracking, contract expiry, project planning, or any situation where you need to know what date falls N days before or after a reference date.

Frequently Asked Questions

Can I add months and years, not just days?
Yes — all four units (years, months, weeks, days) can be combined in a single calculation.
Does it account for leap years?
Yes — adding 1 year to 29 Feb 2024 returns 28 Feb 2025; adding 1 month to 31 Jan 2026 returns 28 Feb 2026.
What does the weekday output do?
Surfaces the day of week (Monday-Sunday) of the result — useful for scheduling and planning.
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Want to understand the math?

Browse all guides →
How to Use Date Calculator
date

How to Use Date Calculator — Complete Guide

Learn how to add and subtract days, weeks, months, and years from any date using the free Date Calculator on Tools.Town — find deadlines, expiry dates, and past dates.

7 May 2026

5 min read

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