Synastry · two charts in conversation

Compatibility

Place two charts together and explore where their planets meet. Each person's local birth time, birthplace, and timezone are entered separately.

A guide to synastry and chart comparison →

Start with a known birth time

Houses and rising signs need a recorded time and birthplace. If the time is unknown, try the date-only natal moon estimate.

Person A

Name or nickname (optional)

Birth date

Local birth time

Use the time recorded at the birthplace.

Search the birth city

Search sends only the place name to Open-Meteo. Your birth date, time, and name stay in this tab. Enter coordinates below to skip city search.

Birthplace timezone

Use the IANA region for the birthplace, not your current location. The date determines its historical UTC offset, including daylight saving.

Person B

Name or nickname (optional)

Birth date

Local birth time

Use the time recorded at the birthplace.

Search the birth city

Search sends only the place name to Open-Meteo. Your birth date, time, and name stay in this tab. Enter coordinates below to skip city search.

Birthplace timezone

Use the IANA region for the birthplace, not your current location. The date determines its historical UTC offset, including daylight saving.

Calculations run in this browser. Your entries and results are not saved to your account or added to the page address. Reset clears them from this tool. City lookup is optional and sends only the search text to Open-Meteo.

Synastry · two charts in conversation

Compatibility

Place two charts together and explore where their planets meet. Each person's local birth time, birthplace, and timezone are entered separately.

A guide to synastry and chart comparison →

Start with a known birth time

Houses and rising signs need a recorded time and birthplace. If the time is unknown, try the date-only natal moon estimate.

Person A

Name or nickname (optional)

Birth date

Local birth time

Use the time recorded at the birthplace.

Search the birth city

Search sends only the place name to Open-Meteo. Your birth date, time, and name stay in this tab. Enter coordinates below to skip city search.

Birthplace timezone

Use the IANA region for the birthplace, not your current location. The date determines its historical UTC offset, including daylight saving.

Person B

Name or nickname (optional)

Birth date

Local birth time

Use the time recorded at the birthplace.

Search the birth city

Search sends only the place name to Open-Meteo. Your birth date, time, and name stay in this tab. Enter coordinates below to skip city search.

Birthplace timezone

Use the IANA region for the birthplace, not your current location. The date determines its historical UTC offset, including daylight saving.