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Rahu Kalam calculator

Find the daily Rahu Kalam period by dividing daylight into eight segments according to the weekday.

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Rahu Kalam calculator

Calculate Rahu Kalam for a specific date and location.

City search uses the Open-Meteo geocoding service.

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How does this tool work?

Calculate Rahu Kalam for a specific date and location. The tool runs directly in your browser without an account, giving you a quick and practical estimate.

Daylight from sunrise to sunset is divided into eight equal parts; the selected segment depends on the weekday. The calculation is performed locally from the information you enter and the calendar or astronomical rules required by the selected tool. Always check the date, location, time zone and selected options before relying on the result. Dates or times can vary slightly depending on local conventions, religious authorities or the calculation method used by another source.

Rahu Kalam calculator

  1. Enter the details

    Enter the date, location or values requested by the tool.

  2. Run the calculation

    Choose the relevant options and run the calculation directly in your browser.

  3. Check the result

    Review the result and confirm the parameters before using it as a reference.

Use cases

Personal planning

Organize your personal schedule by quickly checking a useful date, period or calculated value.

Quick verification

Compare information you already have with an independent calculation performed directly in the browser.

Event preparation

Prepare for an observance, celebration or deadline by checking the result with the appropriate settings.

Tips and best practices

  • Check the date and all parameters before running the calculation.
  • For sun-related calculations, use the location and time zone that match the place you need.
  • For formal religious use, compare the result with guidance from your community or relevant authority.

Frequently asked questions

What does this tool calculate?

Calculate Rahu Kalam from date, location, sunrise and sunset. Daylight from sunrise to sunset is divided into eight equal parts; the selected segment depends on the weekday.

Are my data sent to a server?

No. The main calculation is performed locally in your browser and does not require an account.

Why can the result differ from another source?

Calendars, local conventions, calculation methods or religious authorities may use slightly different rules.

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GuideConcepts and technologiesBeginner

Rahu Kalam: how the daily period is calculated

Understand the traditional Rahu Kalam calculation from local sunrise and sunset, eight daylight segments and the weekday mapping.

17 September 20263 min