Contraction Timer
Track the duration and timing of your contractions to help you understand labor patterns.
This contraction timer is intended to help you record the timing and duration of contractions for personal tracking. It does not diagnose labor or determine when medical care is needed.
Contraction History
| # | Start Time | Duration (sec) | Interval (min) |
|---|
Contraction Trend
Summary: Record your contractions to track patterns. This tool is for educational tracking only.
The educational information on this page is based on guidance from recognized medical organizations and public health resources.
How This Timer Works
This contraction timer records each contraction's start time and duration. When you press "Start," the timer begins counting. Press "Stop" when the contraction ends, and the duration is saved. The interval between contractions is calculated as the time between the start of one contraction and the start of the next. This tool is designed for educational tracking only and should not replace medical advice or emergency care.
Real Example
Example contraction pattern:
- Contraction 1: 45 seconds
- Contraction 2: 52 seconds (6 min interval)
- Contraction 3: 60 seconds (5 min interval)
- Contraction 4: 58 seconds (4 min interval)
Limitations
Contraction timing alone cannot confirm active labor. Labor patterns vary between pregnancies, and healthcare professionals may use additional clinical information. This timer is not a diagnostic tool. If you have concerns, contact your healthcare provider.
References
- American College of Obstetricians and Gynecologists (ACOG)
- World Health Organization (WHO)
- National Health Service (NHS)
- Society for Maternal-Fetal Medicine (SMFM)
Related Pregnancy & Women's Health Tools
Trust & Privacy
Educational content is reviewed periodically for clarity and accuracy.
Frequently Asked Questions
Press "Start" when a contraction begins and "Stop" when it ends. The timer will record the duration. Repeat for each contraction.
Duration is how long the contraction lasts. Interval is the time between the start of one contraction and the start of the next.
No. This timer records contraction patterns for educational tracking. It cannot diagnose labor. Contact your healthcare provider for medical advice.
No. All data stays in your browser and is cleared when you reset or close the page.
If you experience severe pain, heavy bleeding, decreased fetal movement, your water breaks, or you believe you may be in labor, contact your healthcare provider or emergency services immediately.
🌸 © 2026 CalculatorKits — Contraction Timer · For educational use only
Contraction Timer: Track Labor Contractions and Understand Their Pattern
As your due date gets closer, contractions can become one of the hardest parts of early labor to judge. One contraction may feel uncomfortable and then disappear for a while. Later, you may notice that they are coming more often or lasting longer. A Contraction Timer gives you a simple way to record these changes without trying to watch the clock manually.
The CalculatorKits Contraction Timer is designed for quick contraction timing. The tool uses a simple timer interface with Start, Stop, and Reset controls. You start the timer when a contraction begins and stop it when the contraction ends. You can then repeat the process for each contraction and review the timing pattern.
Timing contractions can be useful because healthcare providers often want to know how long contractions last and how far apart they are. Cleveland Clinic recommends recording both the duration of each contraction and the interval from the beginning of one contraction to the beginning of the next.
A Contraction Timer does not diagnose labor and does not decide when you should go to the hospital. Your maternity team may give you specific instructions based on your pregnancy and medical history. This guide explains how the tool works, how to use it correctly, what contraction duration and frequency mean, and when you should contact your healthcare provider.
Quick Answer
A Contraction Timer measures how long each contraction lasts and helps you track the time between contractions.
The basic measurements are:
Contraction duration = End time minus Start time
Contraction interval = Start of one contraction to Start of the next contraction
For example, if one contraction begins at 7:00 PM and ends at 7:00:50 PM, it lasted 50 seconds.
If the next contraction begins at 7:06 PM, the interval is 6 minutes.
The CalculatorKits tool makes this easier by letting you press Start at the beginning of a contraction and Stop when it ends. You repeat the process for each contraction to build a useful pattern.
Regular contractions that become stronger, longer, and closer together can be a sign that labor is progressing. ACOG explains that true labor contractions generally develop a regular pattern and become closer together over time.
What Is a Contraction Timer?
A Contraction Timer is a digital tool that records the duration and timing of uterine contractions.
During a contraction, the uterus tightens and then relaxes. The abdomen may feel hard during the contraction and softer afterward.
As labor progresses, contractions often become more regular and stronger.
The main reason to use a Contraction Timer is to record what is happening over several contractions rather than trying to remember each one.
The CalculatorKits tool keeps the process simple. You do not need to calculate seconds manually. Start the timer when a contraction begins, stop it when the contraction ends, then repeat for the next one.
Why Use This Contraction Timer?
Contractions can be difficult to track when you are uncomfortable or concentrating on breathing.
A digital timer removes some of that work.
A Contraction Timer can help you:
- Measure how long contractions last
- Track how often contractions occur
- Notice whether contractions are becoming closer together
- Notice whether contraction duration is changing
- Give your healthcare provider useful timing information
- Keep a simple record during early labor
- Avoid guessing the timing from memory
This can be especially helpful when contractions begin irregularly.
One contraction alone does not tell you much. The pattern across several contractions is more useful.
Cleveland Clinic recommends tracking contraction timing because duration and intervals can help you describe the pattern to your healthcare provider.
How Does the Contraction Timer Work?
The CalculatorKits tool uses a straightforward timer system.
Start at the Beginning
Press Start when the contraction begins.
The timer begins counting the duration of that contraction.
Stop When It Ends
Press Stop when the contraction has ended and your uterus begins to relax.
The recorded time represents the contraction duration.
Repeat for Each Contraction
When another contraction begins, press Start again.
When it ends, press Stop.
Continue this process so you have several contractions to compare.
Use the Pattern
The goal is not to focus on one isolated number.
Look at whether contractions are becoming:
• More regular
• Longer
• Stronger
• Closer together
ACOG notes that true labor contractions generally become stronger and closer together with time, while Braxton Hicks contractions are usually less regular and do not develop the same progressive pattern.
How to Use the Contraction Timer
Using the CalculatorKits tool is simple.
- Open the CalculatorKits Contraction Timer.
- Get comfortable and keep the calculator where you can easily see or reach it.
- Wait for the next contraction to begin.
- Press Start at the exact moment the contraction begins.
- Stay focused on the contraction rather than the clock.
- Press Stop when the contraction ends.
- Record or review the duration shown by the timer.
- Wait for the next contraction.
- Press Start again when the next contraction begins.
- Press Stop when it ends.
- Repeat the process for several contractions.
- Compare the pattern instead of judging your labor from one contraction.
- Use the timing information when speaking with your midwife, doctor, or maternity unit.
- Use Reset when you need to begin a new timing session.
The important part is consistency. Start at the beginning and stop at the end every time.
How Should You Time Contractions?
There are two numbers you should understand.
Duration
Duration is how long one contraction lasts.
Measure from the moment the contraction begins until it ends.
For example:
Start: 8:00:00
End: 8:00:55
Duration: 55 seconds
Interval
The interval is the time from the beginning of one contraction to the beginning of the next.
For example:
First contraction begins at 8:00.
Second begins at 8:06.
The interval is 6 minutes.
Do not measure the interval from the end of one contraction to the beginning of the next. Cleveland Clinic specifically describes contraction timing from start to start.
Why Does Contraction Timing Matter?
A single contraction can happen for many reasons.
The pattern is more informative.
Early contractions may be irregular.
As labor develops, contractions often become more consistent and closer together.
ACOG describes true labor contractions as having a regular pattern and becoming closer together over time. They can also become stronger and last longer.
This is why a Contraction Timer becomes particularly useful when you notice that contractions are no longer random.
What Is the Difference Between True Labor and Braxton Hicks?
Braxton Hicks contractions are sometimes called practice contractions.
They can happen during pregnancy, especially later in pregnancy, and can sometimes feel surprisingly strong.
They usually do not develop a steady pattern.
True labor contractions generally become more regular and progressive.
ACOG says false labor contractions are usually less regular and do not become closer together, while true labor contractions tend to become stronger and closer together. Sometimes a vaginal examination is needed to determine whether the cervix is changing.
Braxton Hicks May
- Remain irregular
- Stay about the same strength
- Ease after rest or a change of activity
True Labor May
- Become more regular
- Become stronger
- Last longer
- Become closer together
Timing can provide useful information, but it cannot confirm labor by itself.
How Long Do Labor Contractions Last?
Contraction duration varies.
Cleveland Clinic notes that true labor contractions commonly last around 40 to 60 seconds, while ACOG explains that active labor contractions can last around 60 to 90 seconds. Individual contractions do not always fit a single pattern.
This is why you should not decide whether you are in labor based only on a specific number of seconds.
Look at the overall pattern and follow the instructions given by your own healthcare provider.
How Far Apart Should Contractions Be?
There is no single interval that applies to every pregnancy.
During early labor, contractions may be widely spaced.
As labor progresses, they may become closer together.
Cleveland Clinic notes that many providers use contractions occurring about every three to five minutes and lasting around a minute as a reason to go to the place of birth, but also emphasizes that healthcare providers may give different instructions.
Your own care plan should take priority.
Some people are told to use a 5 1 1 pattern. This commonly means contractions about five minutes apart, lasting about one minute, for about one hour.
Do not assume this rule applies to your pregnancy without checking with your provider.
Is the 5 1 1 Rule Always Appropriate?
No.
The 5 1 1 rule is a common general guideline, but individual instructions can differ.
Your provider may want you to call earlier if:
- This is your first baby
- You have had a previous rapid labor
- You live far from your hospital
- You have a high risk pregnancy
- Your water has broken
- You have been told to follow a specific labor plan
- You are less than 37 weeks pregnant
ACOG advises contacting your obstetric provider if you think you are in labor or are unsure.
When Should You Start Timing Contractions?
You can begin timing when you notice a pattern of abdominal tightening or pain that appears to be repeating.
Early contractions may be irregular, so you may not immediately know whether labor has begun.
A Contraction Timer can help you collect information while you observe the pattern.
Some people start timing when contractions become uncomfortable enough that they need to stop and concentrate.
Your provider may have given you different instructions, so follow those instructions.
Can You Time Contractions Before Your Due Date?
Yes, but contractions before 37 weeks require particular attention.
The NHS advises contacting your maternity unit urgently if you think you are in labor before 37 weeks.
Preterm labor can require prompt medical assessment.
Do not continue timing at home for a long period simply because you have not reached a particular contraction pattern.
What Should You Tell Your Healthcare Provider?
When you call your maternity team, useful information can include:
- When contractions started
- How long each contraction lasts
- How far apart they are
- Whether they are becoming stronger
- Whether your waters have broken
- Whether you are bleeding
- Whether your baby is moving normally
A Contraction Timer can make the timing part much easier to communicate.
Cleveland Clinic recommends recording both duration and interval because this information can help your provider understand the contraction pattern.
What Other Signs Can Mean Labor Is Starting?
Contractions are only one possible sign.
The NHS lists several signs that labor may be beginning, including:
- Regular contractions
- A show or loss of the mucus plug
- Backache
- An urge to use the toilet
- Waters breaking
The NHS recommends contacting your midwife or maternity unit if you think you are in labor or are unsure about what is happening. NHS: Signs That Labour Has Begun
What If Your Water Breaks?
If your waters break, contact your obstetric care provider or maternity unit and follow their instructions.
You may experience a trickle or a larger gush of fluid.
Try to note the time and any relevant details about the fluid.
Do not rely on the Contraction Timer to decide what to do after your waters break.
The NHS advises contacting your maternity unit when your waters break, even if contractions have not started.
What If Contractions Are Painful but Irregular?
Painful contractions do not always mean established labor.
Braxton Hicks contractions can sometimes be uncomfortable or painful.
ACOG explains that false labor can improve with rest or hydration, whereas true labor tends to continue and become stronger and more regular.
Using a Contraction Timer can help you see whether a pattern is developing.
If you are unsure, contact your healthcare provider instead of trying to diagnose labor yourself.
How Accurate Is a Contraction Timer?
The timer can accurately measure the amount of time between the Start and Stop actions.
The biological interpretation is different.
The tool does not know whether a contraction is true labor, Braxton Hicks, or another type of uterine tightening.
It cannot examine the cervix.
It cannot determine dilation.
It cannot monitor your baby’s heart rate.
It cannot tell whether your membranes have ruptured.
This is why the tool should be viewed as a timing aid rather than a medical diagnostic device.
Contraction Timer Limitations
The tool has several important limitations.
It Does Not Diagnose Labor
Only your healthcare provider can determine whether labor is progressing.
It Does Not Measure Cervical Changes
Cervical dilation and effacement cannot be determined from contraction timing.
It Does Not Monitor the Baby
A timer cannot replace fetal monitoring when monitoring is medically required.
It Does Not Replace Medical Advice
Your care plan may differ from general labor timing guidelines.
Timing Can Be Entered Incorrectly
If you forget to press Start or Stop at the correct moment, the recorded duration may be inaccurate.
These limitations do not make the tool useless. They simply define what it is designed to do.
Common Mistakes When Using a Contraction Timer
Starting Too Late
Press Start as soon as the contraction begins.
Stopping Too Early
Press Stop when the contraction has genuinely ended.
Measuring From End to Start
Intervals should generally be measured from the beginning of one contraction to the beginning of the next.
Focusing on One Contraction
Look for the pattern across several contractions.
Waiting for a Certain Number Without Calling
Do not delay contacting your provider because the contractions have not reached a particular interval.
Ignoring Other Symptoms
Bleeding, reduced fetal movement, or broken waters may require immediate attention regardless of contraction timing.
Frequently Asked Questions
What is a Contraction Timer?
A Contraction Timer is a digital tool that measures contraction duration and helps track the interval between contractions.
How do I time a contraction?
Press Start when the contraction begins and Stop when it ends.
How do I measure the time between contractions?
Measure from the beginning of one contraction to the beginning of the next.
How long should a contraction last?
Labor contractions vary, but many active labor contractions last around 60 seconds or longer. Timing alone cannot determine whether you are in active labor.
How far apart should contractions be before going to the hospital?
Follow your healthcare provider’s instructions. General guidance often uses a pattern of regular contractions that are becoming closer together, but the appropriate threshold varies.
What is the 5 1 1 rule?
It commonly refers to contractions occurring about five minutes apart, lasting about one minute, for about one hour. Your provider may give you different instructions.
Can Braxton Hicks contractions be painful?
Yes. ACOG notes that Braxton Hicks contractions can sometimes be painful.
How can I tell if contractions are real labor?
True labor contractions tend to become stronger, longer, and closer together. Braxton Hicks contractions are usually less regular and do not progressively intensify.
Should I time contractions before 37 weeks?
Yes, but if you think you may be in labor before 37 weeks, contact your maternity provider promptly rather than relying only on timing.
What if my water breaks?
Contact your maternity unit or obstetric provider and follow their instructions.
Can a Contraction Timer tell me how dilated I am?
No. Cervical dilation requires a clinical assessment.
Can it tell me when to go to the hospital?
No. It provides timing information. Your healthcare provider should tell you when to come in.
Can I use it for Braxton Hicks contractions?
Yes. Timing can help you observe whether the contractions are developing a regular pattern.
What if contractions become very close together?
Contact your healthcare provider or maternity unit and follow the instructions you have been given.
What if I am bleeding?
Heavy vaginal bleeding requires urgent medical attention. Do not wait for a particular contraction pattern.
What if my baby is moving less than usual?
Contact your maternity provider promptly. Do not rely on a Contraction Timer to assess fetal wellbeing.
Is the CalculatorKits Contraction Timer a medical device?
No. It is an educational timing tool designed to help record contractions.
Key Takeaways
A Contraction Timer helps measure how long contractions last and how frequently they occur.
Press Start when a contraction begins and Stop when it ends.
Measure intervals from the start of one contraction to the start of the next.
The pattern across several contractions is more useful than one isolated contraction.
True labor contractions commonly become stronger, longer, and closer together.
Braxton Hicks contractions are generally less regular and do not show the same progressive pattern.
The 5 1 1 rule is a common guideline, but your provider may give you different instructions.
A Contraction Timer cannot diagnose labor or measure cervical dilation.
Contact your healthcare provider if you think you are in labor or are unsure about your symptoms.
Seek urgent advice for heavy bleeding, reduced fetal movement, broken waters, severe constant pain, or suspected labor before 37 weeks.
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References
- ACOG: How to Tell When Labor Begins
Explains signs of labor, true labor contractions, Braxton Hicks contractions, contraction timing, and when to contact an obstetric care provider. - NHS: Signs That Labour Has Begun
Explains contractions, waters breaking, the show, backache, reduced fetal movement, and when to contact a maternity unit. - NHS: The Stages of Labour and Birth
Provides information about early labor, established labor, contraction patterns, and the stages of childbirth. - Cleveland Clinic: Contractions
Explains contraction duration, intervals, true labor, false labor, and how to time contractions correctly. - Cleveland Clinic: Stages of Labor
Explains labor progression and why contraction frequency, duration, and intensity are useful when describing labor.
Medical Disclaimer
This article and the CalculatorKits Contraction Timer are provided for general educational and informational purposes only. The tool is designed to help record contraction timing and does not diagnose labor, measure cervical dilation, monitor fetal wellbeing, or determine when you should go to the hospital. Pregnancy and labor can change quickly. Follow the instructions provided by your doctor, midwife, or maternity care team. Contact your healthcare provider if you think you are in labor or are unsure about your symptoms. Seek urgent medical care for heavy vaginal bleeding, reduced fetal movement, broken waters, severe constant pain, or suspected labor before 37 weeks.
Written and reviewed by the CalculatorKits Editorial Team
Last Updated: September 7, 2026