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Calculator: Estimated Date of Delivery (EDD)


Calculator: Estimated Date of Delivery (EDD)

 
Input
 
Current date   
Last menstrual period (LMP)   
Ultrasound (US) date   
Gestational age by US     

 
Results
 
 
Current gestational age by LMP  
EDD by LMP  
Current gestational age by US  
EDD by US  
 

 
 

 
Notes
  • This calculator gives you two options for estimating EDD. Enter either the date of the first day of the LMP, or the date of a US examination and the gestational age by US. Input any parameters to compare the two date calculations.
  • Gestational age by LMP is calculated from the first day of the LMP.
  • EDD by LMP is calculated by adding 280 days (40 weeks) to the first day of the LMP.
  • Gestational age by US is measured by US on the Ultrasound (US) date.
  • EDD by US is the estimated date of delivery based on the Gestational age by US and the Ultrasound (US) date. It is the Ultrasound (US) date + (280 [days] - Gestational age by US [days] on the Ultrasound (US) date).

 
Only digits 0 to 9 and a single decimal point (".") are acceptable as numeric inputs. Attempted input of other characters into a numeric field may lead to an incorrect result.

Information on this page may not appear correctly if printed.

Legal Notices and Disclaimer

All information contained in and produced by the EBMcalc system is provided for educational purposes only. This information should not be used for the diagnosis or treatment of any health problem or disease. THIS INFORMATION IS NOT INTENDED TO REPLACE CLINICAL JUDGMENT OR GUIDE INDIVIDUAL PATIENT CARE IN ANY MANNER. Click here for full notice and disclaimer.

EBMcalc is Copyright © 1998-2023 Foundation Internet Services, LLC

Topic 13505 Version 15.0