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Formula and Explanation
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How to Calculate Pregnancy Week?
Two different methods can be used:
Based on Last Period Date:
Pregnancy Week = (Today - Last Period Date) ÷ 7
Based on Ultrasonography Date:
Pregnancy Start = Ultrason Date - Ultrason Week
Pregnancy Week = (Today - Pregnancy Start) ÷ 7
Trimesters:
1. Trimester: 0-12 weeks
2. Trimester: 13-26 weeks
3. Trimester: 27-40 weeks
Pregnancy Week Calculation
Calculation Method
Last Menstrual Date
Ultrasound Date
Last Menstrual Date
Ultrasound Date
Pregnancy Week
Enter the values, the result will be displayed.
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