Contraction timer (5-1-1)

Tap when a contraction starts and when it ends. The timer shows how long they last, how far apart they are, and whether you have reached 5-1-1.

Not medical advice. Call your provider or hospital whenever they told you to, or any time something feels wrong.

Not at 5-1-1 yet.

○ About 5 minutes apart or closer · average —
○ About 1 minute long · average —
○ For 1 hour · 0 of 60 min

0 timed · 0 in the last hour

Contractions, newest first
#	Started	Length	Apart
No contractions yet. Tap Start when one begins and Stop when it ends.

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Works offline
Data stays on this device

Not medical advice. This is not medical advice. It is a stopwatch with arithmetic. Follow the plan your doctor, midwife or hospital gave you, and call them or go in whenever they told you to, or any time something feels wrong (for example bleeding, your waters breaking, or the baby moving less). In an emergency call your local emergency number.

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How it's calculated

Length = the time from when you tap Start to when you tap Stop.
Time apart = from the start of one contraction to the start of the next, which is how Cleveland Clinic says to time them.
5-1-1 means contractions about 5 minutes apart, each lasting about 1 minute, with that pattern going on for 1 hour (MetroHealth).
To allow for tapping a little late or early, the timer counts a contraction as about a minute long at 55 seconds or more and about 5 minutes apart at 5 minutes 30 seconds or less. It shows 5-1-1 when an unbroken run of such contractions has lasted at least an hour and the most recent one started within the last 20 minutes. These tolerances come from LaborClock, the full app.
Averages are over the contractions that started in the last hour.

Worked example

Contractions start at 2:00, 2:05, 2:10 and so on, each lasting 60 seconds. Each one is 5:00 apart, start to start, and 1:00 long. By the contraction that starts at 3:00, the run has gone on for 60 minutes, so the timer shows that the 5-1-1 pattern has been reached.

Sources

Signs of Labor — MetroHealth
Defines 5-1-1: contractions 5 minutes apart, lasting 1 minute, for 1 hour.
Contractions — Cleveland Clinic
Time contractions from the beginning of one to the beginning of the next.
How to Tell When Labor Begins — American College of Obstetricians and Gynecologists (ACOG)
True labor contractions come at regular intervals; each lasts about 60 to 90 seconds.

Questions

Is 5-1-1 the rule I should follow?

Only if it is the one your provider gave you. Advice differs: Cleveland Clinic, for example, describes contractions about 60 seconds long every 3 to 5 minutes. Your own provider's instructions come first.

Do I measure from the end of one contraction to the start of the next?

No. Time apart is measured from the start of one contraction to the start of the next. That is what this timer does.

Does it keep working if I lose signal or close the tab?

Yes. Once the page has loaded it needs no connection, and every contraction is saved in this browser as soon as you tap Stop, so reopening the page brings them back.

Can I show the list to the nurse?

Yes. The table lists each contraction's start time, length and time apart. The full LaborClock app can also export a CSV.

By the All Things AI team · Last tested 17 October 2026 · Questions or a wrong number? support@allthingsn.com