A free BaZi chart, calculated locally.

Enter supported birth details to view the available Four Pillars, Day Master, and a raw visible-element count. This tool does not interpret or predict.

AI-free · calculation only

Birth details, with uncertainty visible.

Use the local clock time at birth. All values stay in this browser and are never placed in a URL.

Gregorian date and local time

Research range: 1901-01-01 through 2050-12-31. Future dates are not accepted.

Gregorian birth date Required. Use a Gregorian calendar date.

Local birth time Required when known. Enter the time shown on the local clock, not a converted time.

I do not know the local birth time

Unknown time uses the whole local date. The hour pillar is omitted and only invariant fields can be shown.

Birthplace timezone

This first local slice supports Asia/Manila only. Other listed zones are included so their limitation remains explicit.

IANA timezone An unsupported zone receives a field error. The calculator never substitutes another place or offset.

Your available chart

Pillar anatomy

Each displayed pillar is shown as its raw two-character pair, then separated into its Heavenly Stem and Earthly Branch labels.

Visible-element distribution

Element	Visible marks	Raw count

Five-element vocabulary

How to read this chart

Methodology and limitations

This local adapter returns package calculation output using a sect-2 local-midnight convention. Package output is not independent astronomical validation; the stated research support is limited to the supported range and Asia/Manila conditions.

Asia/Manila is the only supported timezone in this first slice; an invalid IANA name is a validation error.
Supported Gregorian research range is 1901-01-01–2050-12-31; future dates are rejected.
Runtime IANA historical-offset handling must resolve uniquely at UTC+08, or calculation is blocked rather than guessed.
No true-solar-time correction is applied.
Unknown time evaluates the whole local date and withholds non-invariant year, month, or day fields. Known-minute inputs near a term boundary can withhold year or month when the tolerance window changes them.

Glossary

Pillar: A displayed stem-and-branch pair for year, month, day, or available hour.
Day Master: The displayed day stem, shown with its raw element and polarity label.
Visible-element count: One main element per displayed stem and branch. Hidden stems and strength are not counted.
Withheld: A field not shown because it changed across the supported uncertainty window.

Raw counts are not a strength score, medical claim, missing-element prescription, scientific finding, or prediction.