When to Hair Dye Calculator

Calculate when to dye your hair again based on the last time you colored your hair and how frequently you dye your hair or do root touch-up.

Last Hair Dye On:

Dye Hair Again In:

Entry Fields

Use the Last Hair Dye On field to specify the date when you last dyed your hair. Generally, you'll want to enter either the date you did a full coloring or a root touch-up.

In Dye Hair Again In, specify when to dye your hair again in relation to the last time you colored your hair. You can specify in months or in weeks.

Note that the Last Hair Dye On date is not restricted to a past date, which means you can enter a future date when you project applying hair color, helpful if planning ahead between two hair dye applications, such as around the holidays. If you use a projected future date, the calculator will display "futurecast" below the Last Hair Dye Date. The calculated next hair dye date is based on the projected date, and is only valid if you actually color on that date.

For example, if it's October, and you specify November 1st as your Last Hair Dye On date, and Dye Hair Again in 6 weeks, the Next Hair Dye date is December 13th. However, if it turns out you do not dye your hair on November 1st, the 6 week projection no longer applies. Simply return and use the When to Hair Dye Calculator again when you get your schedule ironed out!

About When to Hair Dye Calculator

This calculator determines when to dye your hair again based on your last hair dye and how long until you will next apply color. Whether you color your hair at home using over-the-counter products or at a hair salon by your colorist, easily plan ahead so your hair color is vibrant, and your roots match perfectly!

How Often Can I Dye My Hair?

While the general recommendation is to dye your hair every 1 to 2 months to preserve your hair health, there are times when that's not practical, especially if you've done a total hair color change, (e.g. going from blonde to brunette, or auburn to dark brown) or if you're dealing with root growth mis-matching your current hair color.

Root touch-up is often done every 3 to 4 weeks, or even more often depending on how fast your hair grows and the shade difference between your natural biological hair color and the dye color you're using; for instance, if you're greying and your natural hair color is a shade of brown, or you've gone blonde and loving it until your black hair roots emerge 2 weeks later!

When in doubt, check with your hair colorist regarding recommended time between hair dyes; Or, if you color at home, check the instructions provided with your store bought dye. There are also many websites devoted to discussing hair dye frequency and how it affects the health of your hair.

Happily, here in the 2020s, hair dyes are improved and do not fry one's hair as in days of yore! That said, most checmical processing that impacts the hair shaft , such as permanent hair dye, can stress or damage hair, so it's important to use within the product's guidelines, and follow the hair care instructions if applying at home. In between dyes, there are a wide variety of products designed specifically for dyed hair to nourish and hydrate, including shampoos, conditioners, and serums.