Days Calculator (2026) – Calculate Days Between Dates, Add/Subtract Days

How to Use Days Calculator – 3 Modes

The Days Calculator on CalculatorHubSite has 3 powerful modes to handle all date calculation needs:

Mode 1 – Days Between Dates

Enter a Start Date and End Date to calculate the exact number of days between them. The calculator shows total days, working days (Mon–Fri), weekend days, complete weeks, months, and years. Useful for:

• Calculating how many days until an event (exam, wedding, deadline)
• Finding how many days since a past event (anniversary, contract start)
• Calculating notice period, probation period, or project duration
• Finding working days for salary, leave, or payroll calculations

Mode 2 – Add Days to a Date

Enter a start date and number of days to add to find the resulting date. You can choose to add all calendar days or only working days (Mon–Fri). Use cases:

• Finding delivery date after 7/14/30 days from today
• Calculating due date after 30/60/90 working days
• Finding warranty expiry date
• Calculating notice period end date

Mode 3 – Subtract Days from a Date

Enter a date and number of days to subtract to find the earlier date. Useful for finding: last date to submit applications, deadline counting backward, maturity dates, etc.

Working Days Calculator – India 2026

In India, working days are typically Monday to Saturday for many businesses (6-day week) or Monday to Friday for government, banks, and IT companies (5-day week). Our calculator uses Monday to Friday (5-day standard).

Working Days per Month – India 2026

*Working days count Mon–Fri only. Indian public holidays not included — add/subtract as applicable.

Major Indian Public Holidays 2026

*Holiday dates are approximate. Actual dates may vary by state and official gazette notification.

Days in Each Month – Quick Reference

Quick reference for how many days are in each month, including leap year differences:

Leap Year Rules

Key Date Facts

• 1 regular year = 365 days = 52 weeks + 1 day
• 1 leap year = 366 days = 52 weeks + 2 days
• 1 decade = 3,652 or 3,653 days (depending on leap years)
• 1 century = 36,524 or 36,525 days
• Average month = 30.44 days
• Average quarter = 91.31 days

Date Calculation Formulas

Days Between Two Dates

Working Days Formula

Add/Subtract Days from Date

Common Date Calculations – Quick Reference

Common Use Cases for Days Calculator

1. Loan & Finance

• EMI due date — calculate exact number of days until next EMI payment
• FD maturity — calculate days remaining until FD matures
• Cheque validity — bank cheques are valid for 3 months (90 days) from date of issue
• Credit card billing cycle — calculate statement date and payment due date
• Notice period for loan — RBI mandates minimum notice period for interest rate changes

2. Legal & Contractual

• Notice period calculation — most jobs require 30, 60, or 90 days notice
• Court deadlines — filing deadlines for legal documents
• Contract duration — calculate contract expiry from start date
• Limitation period — legal time limits for filing cases
• Visa validity — calculate remaining days on visa

3. HR & Payroll

• Probation period — most jobs have 3-6 month (90-180 day) probation
• Leave calculation — count working days of leave taken
• Salary per day — monthly salary ÷ working days in month
• Joining date to confirmation — calculate confirmation date after probation
• Overtime calculation — count extra working days for bonus calculation

4. Medical & Health

• Medicine course — calculate end date for 5/7/14/30 day medicine course
• Pregnancy due date — estimated delivery is 280 days from LMP
• Post-surgery recovery — count days since surgery for recovery tracking
• Vaccination schedule — calculate dates for follow-up doses

5. Education

• Exam countdown — days remaining until board exams, entrance tests
• Assignment deadlines — calculate working days until submission
• Academic year — count days of attendance, holidays taken
• Result date — estimated days until result declaration