The Date Calculator — also called a date difference calculator, days between dates calculator, or date to date calculator — is the most practical everyday time tool available. Whether you need to know how many days until a deadline, find 90 days from a specific date for a visa window, track 180 days for a tax compliance period, or simply count how many days since a past event — this tool gives you an instant, exact answer with full Gregorian calendar accuracy.
LizoCalc's date calculator is completely free, requires no sign-up, works on any device, and handles leap years, month-end boundaries, and all edge cases automatically. It covers every use case: students counting days to exams, professionals tracking contract deadlines, legal practitioners computing limitation periods, and anyone asking "what is 90 days from 3/23/26?" or "how many days since my last renewal?"

Date Difference Calculator — Exact Days Between Any Two Dates
Enter any start date and end date — the days between dates calculator instantly returns the exact number of days, a breakdown in years, months and days, total weeks, and a weekday count. It works as a complete date range calculator, day difference calculator, and duration calculator in one place.
| From Date | To Date | Total Days | Weeks | Y / M / D |
|---|---|---|---|---|
| 15 Mar 2000 | 24 Apr 2026 | 9,537 | 1,362.43 | 26y 1m 9d |
| 1 Jan 2026 | 24 Apr 2026 | 113 | 16.14 | 0y 3m 23d |
| 23 Mar 2026 | 24 Apr 2026 | 32 | 4.57 | 0y 1m 1d |
| 1 Apr 2025 | 24 Apr 2026 | 388 | 55.43 | 1y 0m 23d |
Inclusive vs Exclusive Day Counting — Which Should You Use?
Exclusive (Default)
March 23 → March 25 = 2 days
End day not counted. Used in programming, timestamp math.
Inclusive (Real-world)
March 23 → March 25 = 3 days
Both start and end counted. Used in legal notices, rent periods, contracts.
Toggle inclusive/exclusive mode in the calculator. Most legal and real-world deadlines use inclusive counting — both days count.
90, 180, 60, 45, 30 & 28 Days From a Date — Complete Reference Table
The most searched date queries on this page involve adding a fixed number of days to a specific start date. All results below are calculated using exact Gregorian calendar logic — not estimates. For 90 days from today or any other date, use the dynamic widget above or the table here as a quick reference.
| Query | Start Date | Days | Result Date | Day of Week |
|---|---|---|---|---|
| 90 days from 3/23/26 | Mar 23, 2026 | 90 | Jun 21, 2026 | Sunday |
| 180 days from 3/23/26 | Mar 23, 2026 | 180 | Sep 19, 2026 | Saturday |
| 60 days from 3/23/26 | Mar 23, 2026 | 60 | May 22, 2026 | Friday |
| 56 days from 3/20/26 | Mar 20, 2026 | 56 | May 15, 2026 | Friday |
| 90 days from 3/31/26 | Mar 31, 2026 | 90 | Jun 29, 2026 | Monday |
| 60 days from 3/31/26 | Mar 31, 2026 | 60 | May 30, 2026 | Saturday |
| 45 days from 3/31/26 | Mar 31, 2026 | 45 | May 15, 2026 | Friday |
| 90 days from 4/20/26 | Apr 20, 2026 | 90 | Jul 19, 2026 | Sunday |
| 90 days from 5/7/26 | May 7, 2026 | 90 | Aug 5, 2026 | Wednesday |
| 180 days from 5/7/26 | May 7, 2026 | 180 | Nov 3, 2026 | Tuesday |
| 45 days before 5/7/26 | May 7, 2026 | −45 | Mar 23, 2026 | Monday |
| 90 days from 5/22/26 | May 22, 2026 | 90 | Aug 20, 2026 | Thursday |
| 60 days before 5/22/26 | May 22, 2026 | −60 | Mar 23, 2026 | Monday |
| 180 days from 4/30/2026 | Apr 30, 2026 | 180 | Oct 27, 2026 | Tuesday |
| 60 days prior to 4/30/26 | Apr 30, 2026 | −60 | Mar 1, 2026 | Sunday |
| 180 days from 04/13/2026 | Apr 13, 2026 | 180 | Oct 10, 2026 | Saturday |
| 90 days from 4/1/2025 | Apr 1, 2025 | 90 | Jun 30, 2025 | Monday |
| 45 days from 4/1/25 | Apr 1, 2025 | 45 | May 16, 2025 | Friday |
| 90 days from 6/30/2025 | Jun 30, 2025 | 90 | Sep 28, 2025 | Sunday |
| 90 days before 5/30/26 | May 30, 2026 | −90 | Mar 1, 2026 | Sunday |
| 90 days before 6/29/26 | Jun 29, 2026 | −90 | Mar 31, 2026 | Tuesday |
Days Since Calculator — Count Days From Any Past Date to Today
Use the how many days since calculator by setting your start date to any past event and the end date to today. The tool instantly returns days since that moment — useful as a day counter from date, a time since date tracker, or a datecounter for anniversaries, subscriptions, and personal milestones.
| Past Event | Start Date | Days Since (as of Apr 24, 2026) | Weeks |
|---|---|---|---|
| New Year 2026 | Jan 1, 2026 | 113 | 16.14 |
| Pakistan Day | Mar 23, 2026 | 32 | 4.57 |
| Eid-ul-Fitr 2025 | Apr 1, 2025 | 388 | 55.43 |
| Independence Day 2025 | Aug 14, 2025 | 253 | 36.14 |
| New Year 2025 | Jan 1, 2025 | 478 | 68.29 |
How the Date Calculator Works — Formula & Calendar Logic
Days Between Two Dates — The Formula
totalDays = Math.floor(totalMs / (1000 × 60 × 60 × 24))
Converting Days to Weeks, Months, Years
Weekdays = totalDays − (Saturdays + Sundays)
Approx years = totalDays ÷ 365.2425
Avg months ≈ totalDays ÷ 30.4375
Automated Leap Year Handling
| Year | Leap? | Rule | Impact on Calculation |
|---|---|---|---|
| 2024 | ✅ Yes | ÷ 4 | Extra day counted in ranges crossing Feb 29 |
| 2025 | ❌ No | — | Standard 365-day year |
| 2026 | ❌ No | — | Standard 365-day year |
| 2028 | ✅ Yes | ÷ 4 | Extra day counted |
| 1900 | ❌ No | ÷100 not ÷400 | Common calculator error source |
| 2000 | ✅ Yes | ÷ 400 | Correctly counted as leap year |
Varying Month Lengths When Adding Days
Apr 30 + 1 month = May 30 (NOT May 31)
Our calculator uses proper calendar-aware month addition, not simple "add 30 days" logic — so results are always correct regardless of which months are involved.
Why 90, 180, 60 & 30-Day Periods Matter — Real-World Uses
🛂 90-Day Visa Windows
Most tourist and on-arrival visas allow a 90-day maximum stay. Overstaying even one day triggers fines or bans. Use the calculator to track your exact exit deadline from any entry date.
📋 180-Day Compliance Periods
SECP filings, FBR tax compliance, and corporate annual report deadlines often operate on 180-day windows from a trigger event or fiscal year end.
🏥 60-Day Medical Follow-ups
Prescription renewals, post-surgery check-ups, and chronic disease management protocols commonly use 30, 60, or 90-day follow-up windows.
⚖️ Legal Limitation Periods
Civil limitation periods (3 years for many contract claims in Pakistan), notice periods, and appeal deadlines require precise day counting — courts do not accept approximate estimates.
💼 Employee Probation Tracking
Standard probation periods of 60, 90, or 180 days determine when a new hire becomes eligible for permanent status, benefits, or statutory protections.
💳 Bank & Finance Deadlines
Cheque validity (6 months / 180 days), credit card billing cycles (28–30 days), loan EMI schedules, and bank guarantee expiry dates all require exact date arithmetic.
| Use Case | Calculator Mode | Typical Period |
|---|---|---|
| Visa stay validity | 90 days from entry date | 90 days |
| SECP regulatory filing | 180 days from event date | 180 days |
| Bank guarantee expiry | 60 days from issuance | 60 days |
| Probation completion | Days from joining date | 90–180 days |
| Court limitation period | Years/months from event | 3 years |
| Cheque validity | Days between dates | 180 days |
| Pregnancy (due date) | Weeks from LMP | 40 weeks |
| Project milestone | Days from start date | 30/45/60/90 days |
Months & Weeks Between Dates — Complete Conversion Table
For those who think in weekly or monthly cycles — project managers, teachers, coaches, medical professionals — here is a quick conversion reference for the most common durations:
| Duration | Total Days | Full Weeks | Weekdays |
|---|---|---|---|
| 28 days (4 weeks) | 28 | 4 | ~20 |
| 30 days (1 month) | 30 | 4.29 | ~22 |
| 45 days | 45 | 6.43 | ~32 |
| 60 days (2 months) | 60 | 8.57 | ~43 |
| 90 days (3 months) | 90 | 12.86 | ~65 |
| 180 days (6 months) | 180 | 25.71 | ~130 |
| 365 days (1 year) | 365 | 52.14 | ~261 |
More Free Time & Date Tools
- Age Calculator — exact age in years, months, days + total days lived & birthday countdown
- Hours Calculator — time duration between two clock times, decimal hours for payroll
- Time Calculator — hours ↔ minutes ↔ seconds unit conversions
Never miscalculate a deadline again. Whether it's visa windows, exam countdowns, legal notice periods, or project milestones — LizoCalc Date Calculator gives you perfect accuracy every time.
Written by Rana Muhammad Abdullah
MERN Stack Developer & Tool Maker · Mechatronics & Control Engineering Student · LinkedIn