Gregorian to Shamsi Converter: Free Online Miladi to Persian Tool

If you’ve ever tried to sync an Iranian business meeting or figure out when Nowruz actually falls this year, you know the frustration of bouncing between two calendars. The Persian (Shamsi) system and the Gregorian calendar don’t line up neatly, and the mismatch trips up even people who deal with Iran-related dates regularly. This guide cuts through the confusion with step-by-step instructions for using the best free online converters, plus the manual math behind the conversion.

Persian Calendar Months: 12 · Days in Common Year: 365 · Days in Leap Year: 366 · New Year Date (approx): March 21 Gregorian · Top Converter Sites: 5 Persian tools

These specifications define how the Persian calendar operates and how it differs from the Gregorian system.

“The Shamsi calendar is a solar calendar based on the tropical year and is distinct from the lunar Hijri (Qamari) calendar. This means the Iranian year advances when the sun crosses into Aries, not on January 1.”

— Iran Chamber Society

What is the Iran calendar today date and time?

Understanding what “today” means in the Iranian calendar system is the first hurdle for anyone working with dates from Iran. The Iran calendar today—the Shamsi or Jalali calendar—runs on a solar cycle that starts near the vernal equinox, unlike the Gregorian calendar’s fixed January 1 start.

According to the Iran Chamber Society, the Shamsi calendar is a solar calendar based on the tropical year and is distinct from the lunar Hijri (Qamari) calendar. This means the Iranian year advances when the sun crosses into Aries, not on January 1. When you check an Iran calendar today, you’re looking at a date that sits roughly 10–11 days ahead of the Gregorian equivalent in common years, with that gap shifting during leap cycles.

Current Shamsi date display

Several converter tools display the current Shamsi date prominently. Taghvim.com, for instance, offers a live converter for years 1404–1405 that shows both the Gregorian and Shamsi equivalents simultaneously. According to Taghvim.com, this tool advertises itself as the most accurate Shamsi-to-Miladi converter for the current Iranian year. This kind of real-time display eliminates the need for manual calculation when you just need to know what day it is in the Iranian system.

Real-time converter integration

Date-Today.com provides a date converter that supports Gregorian, solar (Shamsi), Hijri, and Hebrew calendars all in one interface. Their tool shows that March 15, 2026, corresponds to 24 Pisces 1404 in the Shamsi calendar. Having multiple calendar systems in one place is useful if you’re also tracking Islamic lunar dates alongside the Iranian solar year.

What is the Persian calendar today?

The Persian calendar—also called the Jalali calendar or Hijri Shamsi—is more than just a date-keeping system. It’s tied to Iran’s national identity and cultural rhythms, from Nowruz celebrations to the academic year. Understanding what the Persian calendar is today means understanding why Iran maintains its own solar system rather than using the internationally dominant Gregorian calendar.

The Iran Chamber Society clarifies that the Shamsi calendar is currently used in Iran and Afghanistan as the official civil calendar. The calendar was refined in the 11th century by Persian mathematicians Omar Khayyam and Mas’ud al-Mas’udi, and it remains among the most accurate solar calendars in existence, with an error of only about one day in every 3,500 years.

“The term ‘Miladi’ in Persian-language tools refers to the Gregorian calendar.”

— Kodoom.com

Today’s Shamsi date details

The Persian year is divided into 12 months, with the first six months having 31 days, months seven through eleven having 30 days, and the twelfth month containing 29 days (or 30 in leap years). This uneven month structure is one reason manual conversion requires more than simple arithmetic. For example, Farvardin (month 1) runs from approximately March 21 to April 20, while Esfand (month 12) ends around March 20.

Comparison to Gregorian

The Iranian calendar is also known by several names in different contexts, including the Persian calendar, the Jalali calendar, and the Hijri Shamsi calendar, according to Iran Chamber Society. In Persian-speaking communities, the Gregorian calendar is often called the “Miladi” calendar—a term that reflects the calendar’s Western Christian origins. This terminology matters when you’re navigating Persian-language converter tools, where “Miladi” is the standard label for Gregorian dates.

How to use Iran Calendar today date Converter?

The most practical way to handle Iranian dates is through an online converter, and the process is straightforward once you know where to look. Most tools work the same way: you input a Gregorian date (or Shamsi date) and get the equivalent instantly, without needing to understand the underlying math.

Kodoom.com offers a free online converter that converts Miladi (Gregorian) dates to Shamsi and vice versa. Their converter allows users to select conversion direction—either from Shamsi to Miladi or from Miladi to Shamsi—making it bidirectional. This flexibility is valuable when you’re working with documents that mix both calendar systems.

Step-by-step online tool usage

Here’s how to use a typical Iran calendar converter:

• Navigate to bahesab.ir, which is identified as the top converter tool in the content plan
• Locate the date input field—it usually defaults to today’s date
• Select your input calendar system (Miladi for Gregorian, or Shamsi for Persian)
• Enter the date you want to convert using the dropdown calendar or manual entry
• Click the convert button to receive the equivalent in the other calendar system
• Copy or note the result for your records

Input Gregorian output Shamsi

For users specifically needing to convert Gregorian to Shamsi, Taghvim.com allows you to select a Gregorian date and see the corresponding Shamsi date. Their interface is designed for Iranian year 1404–1405, making it particularly useful for current-date conversions. The tool also supports the reverse operation—entering a Shamsi date to find the Gregorian equivalent. According to Taghvim.com, they offer what they call the most accurate Shamsi-to-Miladi converter for these years.

Where to find Shamsi to Miladi converter online?

Finding a reliable Shamsi to Miladi converter online is easier than ever, but the quality varies significantly between tools. Some are accurate to the day, while others drift by several days over time due to improper leap year calculations.

The five Persian-focused tools that appear most frequently in search results are bahesab.ir, tabdil.top, taghvim.com, kodoom.com, and date-today.com. Each has different strengths—one might handle bulk conversions better, while another offers better mobile usability.

Top free tools like tabdil.top

Tabdil.top is specifically designed for Persian calendar conversions, with a clean interface that focuses solely on Miladi-Shamsi conversion. The tool supports Gregorian to Shamsi, Shamsi to Gregorian, and also includes Hijri lunar calendar conversion. According to the content plan, tabdil.top appears among the top converter tools recognized in Persian search results.

For those needing broader calendar support, Date-Today.com provides conversion across Gregorian, solar (Shamsi), Hijri, and Hebrew calendars. This makes it valuable if you’re working with documents from multiple cultural or religious contexts, not just Iranian dates.

Accuracy verification

The accuracy of any converter depends on how it handles leap years. The Persian solar calendar uses a 33-year cycle for leap year determination, which is more complex than the Gregorian system’s simple “every four years” rule. According to academic sources, converters that don’t properly implement the 33-year leap year cycle will drift over time, potentially showing incorrect dates for historical or future conversions.

The catch: even a well-designed converter will fail if it doesn’t implement the 33-year leap year cycle correctly.

How to convert Gregorian to Persian calendar?

While online converters handle the math for you, understanding the manual conversion process gives you a deeper appreciation for how the two calendar systems relate. The conversion isn’t a simple multiplication—it involves understanding the vernal equinox anchor point and accounting for leap year cycles.

The manual formula from digikala.com provides a basic starting point: for dates from March 21 onward, the Persian year equals the Gregorian year minus 621. For dates before March 21, you subtract 622 instead. This simple formula works for most modern dates but breaks down near the equinox boundary and doesn’t account for leap year complexities.

Manual formula breakdown

The basic conversion steps are:

• Identify whether your Gregorian date falls before or after March 21
• If on or after March 21: Persian year = Gregorian year − 621
• If before March 21: Persian year = Gregorian year − 622
• Calculate days elapsed since Nowruz to determine the Persian month and day

The more precise formula requires tracking the Julian Day Number and applying astronomical algorithms, which is why professional converters exist. 8box.ir offers an explanation of the technical details for those who want to understand the full calculation methodology.

The implication: for high-stakes dates, the extra minute spent verifying with a second converter could prevent costly mistakes.

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