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Astrolal
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Tool

Birth-Time Sensitivity Checker

Recalculates your chart at −30 to +30 minutes around your recorded time and highlights what changes.

Local clock time where you were born.

Your birth details are sent to our calculation service only to compute the chart and are not used for advertising or shared with analytics. Privacy policy

Your result appears here. It's calculated from your birth details; nothing is shown until then.

How it works

We calculate seven full charts, at −30, −15, −5, 0, +5, +15 and +30 minutes, with the same engine and conventions as your Kundli, then compare the Lagna, its Nakshatra, the Navamsa Lagna, the Moon's Nakshatra and the end of the first Dasha. Times are kept within the birth date.

Questions

Why does birth time matter so much?

The Lagna moves about one degree every four minutes, so it changes sign roughly every two hours and the Navamsa Lagna about every 13 minutes. The Moon moves more slowly, about half a degree an hour.

My time is rounded to the hour. What should I trust?

Anything that stays the same across the table is robust. Anything highlighted could differ; treat it as uncertain until the birth time is confirmed from a hospital or municipal record.

Does this rectify my birth time?

No. Rectification uses life events and expert judgement. This tool only shows which results are sensitive to the time.