# Natal Calculator

> A free birth chart calculator. Enter a birth date, time and place and the site returns a full natal chart - planet positions, house cusps, aspects and a written interpretation - computed in the browser, with the arithmetic and its accuracy documented rather than asserted.

Everything on this site is free and requires no account. Birth data is never transmitted to a server: every calculation runs client-side in JavaScript on the visitor's own device. Google Analytics is used site-wide for aggregate traffic statistics; see the privacy and cookie policy pages for what that does and does not include. Positions come from a truncated VSOP87D series for the Sun and planets and from ELP-2000/82 for the Moon; measured agreement with the reference theories, and the exact truncation, are stated on the methodology page.

## Main tool

- [Birth chart calculator](https://natalcalculator.com/): The homepage. Full natal chart with a worked example rendered into the HTML, five house systems, tropical or sidereal.

## Calculators

- [Vedic birth chart calculator](https://natalcalculator.com/vedic-birth-chart/): Sidereal chart on the Lahiri ayanamsa: Whole Sign houses, the Moon’s nakshatra and pada, and the full Vimshottari dasha timeline.
- [Birth chart compatibility (synastry) calculator](https://natalcalculator.com/birth-chart-compatibility/): Cross-aspects between two charts, every planet against every planet, ordered tightest orb first.
- [Rising sign calculator](https://natalcalculator.com/rising-sign-calculator/): The ascendant alone, with an explanation of why an exact birth time and place are required to compute it.
- [Moon sign calculator](https://natalcalculator.com/moon-sign-calculator/): The Moon sign alone, framed around emotional needs and distinguished from the Sun sign and the ascendant.

## Reference

- [How to read a birth chart](https://natalcalculator.com/birth-chart-reading/): The order to read a chart in - ascendant, chart ruler, luminaries, Midheaven, balance, aspects - worked through one example chart.
- [Planets in houses](https://natalcalculator.com/planets-in-houses/): All 120 planet-house combinations, scoped to the arena of life a placement acts through (career, home, money, relationships, health).
- [Planets in signs](https://natalcalculator.com/planets-in-signs/): All 120 planet-sign combinations, scoped to the manner a placement acts in (bold or cautious, quick or slow, direct or indirect).
- [Zodiac signs](https://natalcalculator.com/zodiac-signs/): The twelve signs as entities in their own right: date range, element, modality, ruling planet, symbol and character.
- [Aspects](https://natalcalculator.com/aspects/): The five major aspects with orb conventions, plus the T-square, Grand Trine and Yod chart patterns.
- [Astrology glossary](https://natalcalculator.com/astrology-glossary/): Definitions for the 34 terms used across this site, each with a stable anchor other pages link to directly.

## About this site

- [About](https://natalcalculator.com/about/): Who runs the site, why it exists, and the editorial standard its pages are held to.
- [Methodology](https://natalcalculator.com/methodology/): The ephemeris, house systems, ayanamsa and time-zone handling behind the calculators, with measured accuracy figures.
- [Contact](https://natalcalculator.com/contact/): How to report a correction, a bug, an accessibility barrier or a copyright claim.

## Legal

- [Privacy policy](https://natalcalculator.com/privacy-policy/): Birth data is never sent to any server; Google Analytics is used site-wide for traffic statistics.
- [Terms of service](https://natalcalculator.com/terms-of-service/): The terms the calculators are offered under.
- [Cookie policy](https://natalcalculator.com/cookie-policy/): This site sets no cookies of its own; Google Analytics sets a small number of its own, listed in full.
- [DMCA](https://natalcalculator.com/dmca/): How to submit a takedown notice and how counter-notices are handled.
- [Accessibility](https://natalcalculator.com/accessibility/): The WCAG 2.1 AA conformance target and the measures in place to meet it.

## Translations

- [Español homepage](https://natalcalculator.com/es/): The same calculator and the same page in Español.
- [Français homepage](https://natalcalculator.com/fr/): The same calculator and the same page in Français.
- [Deutsch homepage](https://natalcalculator.com/de/): The same calculator and the same page in Deutsch.
- [Português homepage](https://natalcalculator.com/pt/): The same calculator and the same page in Português.
- [Italiano homepage](https://natalcalculator.com/it/): The same calculator and the same page in Italiano.
- [Türkçe homepage](https://natalcalculator.com/tr/): The same calculator and the same page in Türkçe.
- [Русский homepage](https://natalcalculator.com/ru/): The same calculator and the same page in Русский.
- [Bahasa Indonesia homepage](https://natalcalculator.com/id/): The same calculator and the same page in Bahasa Indonesia.
- [हिन्दी homepage](https://natalcalculator.com/hi/): The same calculator and the same page in हिन्दी.
- [ไทย homepage](https://natalcalculator.com/th/): The same calculator and the same page in ไทย.

## Optional

- [XML sitemap](https://natalcalculator.com/sitemap.xml): Every indexable URL on the site, with hreflang alternates for the homepage.