Days Since Calculator

Calculate how many days have passed since any date

Pick Your Date
30
Days
30 Days
720
Hours
2,592,000
Seconds
Nov
Dec
Jan
Feb
Mon
Wed
Fri

Don't break the chain. Track your daily streak.

Creates a free live counter you can share and track.

How to Calculate Days Between Dates

Calculating the number of days between two dates is straightforward. Subtract the start date from the end date to get the total number of days elapsed. Our calculator handles leap years, varying month lengths, and timezone differences automatically.

Days = End Date − Start Date

For example, from January 1 to February 14 is 45 days. The calculator also breaks this down into months and days (1 month, 14 days), hours (1,080), and seconds (3,888,000).

Why Track “Days Since”?

Tracking the number of days since a specific event is a powerful psychological tool. Research shows that maintaining a visible streak creates a strong motivation to keep going — a concept known as the “Seinfeld Strategy” or “don't break the chain.”

  • Builds momentum: Each day added to your count reinforces the habit
  • Creates accountability: A visible counter makes your progress tangible
  • Celebrates milestones: 30 days, 90 days, 1 year — each milestone deserves recognition
  • Prevents relapse: The bigger the number, the harder it is to restart from zero

Common Uses for a Day Counter

Quit Smoking

Track your smoke-free journey day by day.

Sobriety Counter

Count the days since your last drink or substance use.

Workplace Safety

"Days since last accident" boards for offices and worksites.

Fitness Streaks

Track consecutive days of exercise or healthy eating.

Project Timelines

How many days since a project kicked off or a bug was reported.

Relationship Milestones

Days since you started dating, got married, or adopted a pet.

Frequently Asked Questions

Does this calculator include the start date?

Yes. If your start date is today, the count begins at 0. Tomorrow it will be 1. The start date itself is counted as day 1 in the streak visualization.

How do I track work days only?

This calculator counts all calendar days including weekends and holidays. For business-day calculations, multiply the total days by 5/7 for a rough estimate.

Can I share my streak with others?

Yes! Click "Save This Streak" to create a live counter. You'll get a shareable link that anyone can view in real-time.

Is this free to use?

Absolutely. The calculator and streak tracking are completely free. No sign-up required.

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