Add/Subtract Days Calculator

Calculate a future or past date by adding or subtracting days from any starting date

Base Date

Days to Add/Subtract

Use negative numbers to subtract days (e.g., -30 for 30 days ago)

Calculated Result Date

How to Use the Date Calculator

Quick Start Guide

Select your starting date using the date picker
Enter the number of days to add (positive) or subtract (negative)
View the calculated result date instantly
Use the result for project planning, scheduling, or deadline tracking

Common Use Cases

Project Management: Calculate project deadlines and milestones
Event Planning: Determine preparation timelines and due dates
Business Planning: Schedule deliveries, meetings, and follow-ups
Personal Planning: Track vacation dates, appointments, and reminders
Academic Planning: Calculate assignment due dates and exam schedules

Frequently Asked Questions

How accurate is this date calculator?

Our calculator is 100% accurate and accounts for leap years, different month lengths, and all calendar variations. It uses the standard Gregorian calendar system.

Can I calculate business days only?

This calculator includes all calendar days (weekends and holidays). For business day calculations, consider that typically excludes weekends and public holidays.

What's the maximum date range I can calculate?

You can calculate dates far into the future or past. The calculator handles dates from year 1 to year 9999, covering virtually any practical use case.

How do I subtract days from a date?

Simply enter a negative number in the days field. For example, enter "-30" to subtract 30 days from your selected date.