OrbHeaven offers a free browser-based birth chart calculator. Enter a birth date, local birth time and birthplace to see planetary placements, house cusps and major aspects. Each aspect includes its orb and whether it is applying or separating.
The result identifies astronomy-engine and its version, tropical zodiac, mean lunar node convention and exact UTC instant used. The birthplace lookup supplies its historic time zone. When the birth time is unknown, the calculator omits houses and the Ascendant and explicitly uses local noon for approximate planetary positions, flagging the Moon as approximate.
The anonymous calculator requires no account or email. Its privacy notice says birth details are used for the calculation and then discarded, without being saved to a database or placed in the URL. This promise applies to the free calculator; the separate account-based OrbHeaven product keeps user records under its privacy policy.
A public glossary explains 41 astrology terms, including houses, aspects, orbs and transits. Entries note differences between astrological conventions where relevant, such as house systems and allowable orbs.
