The 5-1-1 Rule for Contractions, Explained
The 5-1-1 rule is a simple way to describe the contraction pattern that often signals active labor. Here's what each number means, how to check it, and — just as important — where the rule stops and your provider's advice takes over.
Open the free 5-1-1 timer →What "5-1-1" means
The 5-1-1 rule packs three measurements into one easy-to-remember number:
| Number | What it measures | What it means |
|---|---|---|
| 5 | Frequency | Contractions are about 5 minutes apart, measured from the start of one to the start of the next. |
| 1 | Duration | Each contraction lasts about 1 minute (roughly 60 seconds). |
| 1 | Persistence | The pattern has held steadily for at least 1 hour. |
Put together: contractions coming every 5 minutes, lasting about a minute each, and keeping that up for an hour. That combination is what many hospitals use as a general sign that active labor may have begun.
Why providers use it
Early labor can last a long time, and it is common to go to the hospital too early and be sent home. The 5-1-1 rule gives a concrete, memorable threshold that helps distinguish the closer-together, longer, stronger contractions of active labor from the irregular tightening of early or false labor. As Mayo Clinic describes, during active labor contractions become stronger and closer together as the cervix opens.
5-1-1 vs. 4-1-1 vs. 3-1-1
You may hear different versions, and they follow the same format — minutes apart – minutes long – hours sustained:
| Pattern | Apart | Often used for |
|---|---|---|
| 5-1-1 | 5 minutes | The general default, especially for a first baby. |
| 4-1-1 | 4 minutes | Sometimes advised when labor may progress quickly. |
| 3-1-1 | 3 minutes | Sometimes advised for people who have given birth before, or who live far from the hospital. |
None of these is universally "correct." Which one applies depends on your history, how fast your labor tends to move, and your provider's judgment. The instructions your provider gave you always override any general rule online.
How to check the 5-1-1 pattern
You are not looking at a single contraction — you are looking at the average over time. To check it:
- Time several contractions in a row (see how to time contractions).
- Look at the average interval (start-to-start) and the average duration.
- Check whether that ~5-minutes-apart, ~1-minute-long pattern has held for about an hour — not just for two or three contractions.
Where the rule stops
The 5-1-1 rule is about timing — but timing is only one signal, and some situations mean you should not wait for it at all. Contact your provider or go in right away, regardless of the pattern, if:
- Your water breaks (note the time and the fluid's color).
- You have vaginal bleeding.
- Your baby is moving less than usual.
- You have severe or constant pain, a bad headache, or vision changes.
- You are less than 37 weeks pregnant and having regular contractions.
More on this in when to go to the hospital in labor.
Frequently asked questions
What does the 5-1-1 rule mean?
5-1-1 describes a contraction pattern: contractions about 5 minutes apart (start to start), each lasting about 1 minute, continuing steadily for at least 1 hour. Many providers use it as a general sign that active labor may be underway and that it is time to call or head in.
Is it 5-1-1 or 4-1-1?
Both are used. 5-1-1 is the most common guideline. Some providers use 4-1-1 or 3-1-1, especially for people who have given birth before or who live far from the hospital, because labor can move faster. Follow the specific numbers your own provider gave you.
Do I go to the hospital as soon as I hit 5-1-1?
Often, yes — but 5-1-1 is a general guide, not a diagnosis, and your provider's instructions come first. Go in sooner, regardless of timing, if your water breaks, you have bleeding, reduced fetal movement, severe pain, or another warning sign, or if you are less than 37 weeks pregnant.
How do I check the 5-1-1 pattern?
Time several contractions in a row and look at the average: are they about 5 minutes apart start-to-start, lasting about a minute, and holding that pattern for an hour? A contraction timer can watch for this automatically and flag when the pattern is sustained.
Sources
- American College of Obstetricians and Gynecologists (ACOG). How to Tell When Labor Begins.
- Mayo Clinic. Stages of labor and birth.
- NHS. Signs that labour has begun.