
Why Precise Birth Time Matters
Your ascendant moves approximately one degree every four minutes, completing a full zodiac cycle every 24 hours. A Rising Sign Calculator requires birth time accurate to the minute when possible. Even a 15-30 minute error can shift your ascendant degree significantly or, near sign boundaries, change the sign entirely. Without precise timing, house cusps become unreliable, affecting the entire chart structure. If your birth certificate shows time, use it. If estimating, understand results carry uncertainty—especially for borderline degrees between signs.



