ObsCalc version 2.2

What is ObsCalc?

ObsCalc is a web application for obstetric calculations. It can calculate Expected Date of Delivery (E.D.D.) from Last Menstrual Period (L.M.P.) and vice versa. It can also calculate the current maturity of the fetus by date and by U.S.G.

ObsCalc is written in Javascript and can be used offline.


You can use ObsCalc by clicking here. You can save the page for offline usage as well.

Alternatively you can download an android version of ObsCalc from here.


ObsCalc interface is self-explanatory and easy to use.

To calculate E.D.D. you only have to enter the L.M.P. by choosing a date from the datepicker. It will also calculate the maturation by date. To calculate L.M.P. from E.D.D. you have to switch to the "Enter E.D.D." tab.

To calculate the maturity by U.S.G. you have to choose the U.S.G. date from the U.S.G. datepicker and enter the maturity at the time of U.S.G. in terms of weeks and days at the designated field.

When you enter the data the output is displayed automatically.


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Copyright © 2016-2018 Dr. Agnibho Mondal
All rights reserved

ObsCalc is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.


Agnibho Mondal

Softwares of Agnibho

Copyright © 2013-2018 Dr. Agnibho Mondal