< Calculators

Period Calculator

Planning a vacation, special occasion, or just your work-week wardrobe and want to factor in forthcoming periods? Simple with the period calendar: Calculate your period calendar based on your menstrual tracker history, or run Quick Calculate, to forecast your future periods. Also check if your period is late!

Step 1. Select Calculation Rule

Use my menstrual tracking history

Your upcoming periods will be calculated based on your last period and average cycle length, as determined by your tracking history. My period usually lasts 2345678 days To use this option, you need to be logged in.

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Quick Calculate My Period

Your upcoming periods are calculated using the data specified below. My last period started: JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember12345678910111213141516171819202122232425262728293031202220232024 I get my period every 1516171819202122232425262728293031323334353637383940414243444584 days My period usually lasts 2345678 days

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Step 2. Select Display Options

Calculate:

Next 3 Periods Next 6 Periods Next 9 Periods Next 12 Periods Next 18 Periods

Display Type:

Calendar Date Book

Calendar Size:

Mini Maxi

Show Lunar Phases:

Yes No

Show if my period is late:

Yes No

Design:

MMC Classic Period Hues Classic Pink Mod Very Red Mod

Size and design only apply to Calendar display type.

For printing your menstrual calendar on non-color printers, use the classic designs which use images for period days.