Menstrual Cycle Calculator & Calendar: Calculate Your Next Period, Ovulation & Due Date
Medically Reviewed by Dr Anique Ali Last updated: November 23, 2019
Use this menstrual cycle calculator to calculate your next menstrual period, fertile period and due date. To give you an estimate please provide the following information:
Menstrual Cycle Calculator & Calendar: Calculate Your Next Period, Ovulation & Due Date
About The Author
Daniella Hall
Mom to an amazing and crazy toddler, Aaron, with a passion for women’s health and wellness. One the side she also loves being outdoors, baking and creating cooking videos with Aaron
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I am having a problem. Ever since i started menstrating, my period skips. I once went for consultation and the doctor said everything was ok but am not sure. I can’t calculate my cycle because of that. For example in 2015, i had my period on the 29 Jan then 25 Feb, it skipped in March then came 1 April, 8 May, 12June, 17 July, 28 August then skipped September and came again 11 Oct, 12 Nov and 21 Dec. This 2016, it came on 29 Jan and skipped Feb and came again 1 March. Please, i wish to know how many days cycle do i have? How do i calculate it? Thanks
Hi Carole, according to your info., the number of days in your cycle have been 27, 35, 37, 35, 35, 42, 44, 32, 39, 39 and 32 days. It’s not very irregular. Your average can be taken as an average of these, (not including 27 as it has only occurred once in a year), so it will be 36 days approx.
I had unprotected sex on 27th february. my period due date was 6th march .today is 12 march yet i hve not got my periods wat can be the reason.plz help
Hi, there may be many reasons, and yes, pregnancy is one of them too, although it’s not the only reason. Are you experiencing any other symptoms too?
My last period was on January 22nd. I missed my period in February. Could I be pregnant?
Cindy, there may be many reasons of missing a period. Please take a pregnancy test to be sure.
I want to know when my ovulation we start,I saw my menses on the 27/2/2016 and it stop on the 29/2/2016
Hi Becky, could you please tell me the average number of days in your period cycle? Usually the ovulation day is 14 days before the first day of next period.
Comment Text* wen I’m I likely to c my next period if I saw my last period on the 2nd of February and ended on the 5th 2016
Hi, it depends on many factors. It may range from 1st Mar to 15th Mar, for some cases, even later. Do you know the number of days in your period cycle?
Hi my first day of last menstration is feb10 and i had menstration this march 9 does it sound miscarriage?
Hi Elijah, This doesn’t sound anything unusual.
Hi I had my implant removed on the 18th Jan 16 on 28th jan I had a very light bleed for 3 days I’ve not he a bleed in March or as of yet 11th March 16 I am having few pregnancy symptoms but every hpt is negative we are wanting a baby is it just me going crazy or am I actually pregnant please help me
Hi Steph, what symptoms are you experiencing?
Comment Text*i had my period on the20-23 feb when is next period nd my fertil dayz
Hi, it depends on your cycle length. Do you know what is the number of days in your menstruation cycle? If not, can you tell me when was the first day of your period in Jan and Dec?
I had my period 14 February 2016. It lasted for four days .when am I nest due.Am getting all different answer s.
Hi Nana, it depends on your cycle length. Do you know what is the number of days in your menstruation cycle? If not, can you tell me when was the first day of your period in Jan and Dec?
Hi. I’ve had an unprotected intercourse last February 28 and my last period was on February 4.I was anticipating on my next period during the first week of March. However, it did not arrive yet. I’m so worried. Could it be that i am pregnant? Thanks.
Hello, do you have a regular period cycle? Even in that case, I would suggest to wait for one more week. If you don’t get your period, then take a pregnancy test. Also, never have unprotected sex until you are trying. All the best!
The calculator say my next period will be 26th of this month
What if I take one emergency pill today after sex
When will my next period start????
Liz, it’s not possible to determine that. You can get it one week earlier too, you can get it on normal 26th itself too and even a week later than 26th is a possibility.
Hi I had sex on February 2nd and missed my period on the 11th of February I took a pregnancy test today and it says I am 3+ week pregnant. Does that sound right?
Hello Amy. What’s the date of your last period?
Jan 22nd
You would be about 6 weeks pregnant and would be due around Friday, October 28, 2016. Yes, you conceived in February.
I had my period on January 19th – 24th. On February 1st – 4th, I had my next period. When should I expect my period in March?
Hi I had my last period 17th September and finished 20th September 2015 but I was early. It was supposed to be 25th September 2015. So I’m a bit confused on when I conceived. Can anybody help please… t.i.a I’m due 26th June 2016.
Based on the date of your last period, it is possible that you conceived on October 1.
I had my period on the 30th of December 2015 and the 3rd of January 2016. I did a pregnancy test and it was confirmed positive. How do I know the trimester it is?
Your baby is due around Sunday, 9 October 2016 and you’re 9 weeks pregnant. You conceived around January 17.
Hi I’m so confused I had sex through the year with my bf without condom and the year up 2014 i had a miscarriage in November from him but in October last year 2015 I had sex with someone else. We used a condom if i could remember right. Also and me and my bf dont use but in october I got my period until 21/10/15 and I have had unprotected sex in November 8th with my bf. I found out in January that I’m two months pregnant. My due date is 29/7/2016 who’s child can it be? Help me plz
Hi,
This can be very tricky and there’s no way to be sure at this point. The only definitive way would be to have paternity testing done after the baby’s birth.
If you had your period in October after sex with the other guy, there are more chances that the child is of your bf. Also, as the unprotected sex was with the bf, again, the chances are higher for him being the father.