Contraction Timer

How to use the contraction timer

Press Start the moment a contraction begins and Stop when it fades. Each entry records two things that matter: duration (how long the contraction lasts) and frequency (the time from the start of one contraction to the start of the next). The averages update as you go, using your most recent contractions so the pattern reflects where you are now rather than an hour ago.

Everything is timed in your browser and nothing is saved to a server. If you close the page the log clears, so if you want a record to show your midwife, note the averages down.

Duration and frequency — and why both matter

People often focus on how painful contractions feel, but maternity units ask about timing, because the pattern is what distinguishes early labour from established labour.

• Duration is measured from the start of the tightening to when the uterus relaxes. In established labour, contractions typically last around 45–60 seconds or more.
• Frequency is measured from the start of one contraction to the start of the next — not from the end of one to the beginning of the next. This is the most common mistake when people time at home.

What a real labour pattern looks like

The signature of true labour is progression. Contractions become longer, stronger, and closer together over time, and they continue regardless of what you do. Braxton Hicks — practice contractions — are irregular, do not intensify in a steady way, and often ease if you change position, walk, rest, or drink water.

A widely used reference point is the 5-1-1 pattern: contractions roughly five minutes apart, each lasting about one minute, sustained for at least one hour. Many providers use this as a signal to make contact, though your own midwife or unit may give you different instructions based on your pregnancy, how far you live from the hospital, and whether you have given birth before. Their guidance always takes priority over a general rule.

Contact your maternity unit right away if

• Your waters break, or you have any fluid leaking.
• You have any bleeding.
• You notice your baby moving less than usual, or their pattern changes — at any hour, without waiting.
• Contractions start before 37 weeks.
• You have severe or constant pain, a bad headache, or vision changes.
• You simply feel worried or unsure. Maternity units would far rather hear from you.

To understand the difference between practice and true contractions in more depth, read our guide on Braxton Hicks vs real contractions, and see the hospital bag checklist if you have not packed yet.

Frequently Asked Questions

How do I time the gap between contractions?

Measure from the start of one contraction to the start of the next — not from the end of one to the beginning of the next. This tool does that automatically.

When should I go to the hospital?

Follow the guidance your midwife or maternity unit gave you. A common reference is contractions about five minutes apart, lasting a minute, for an hour — but go sooner if your waters break, you have bleeding, or you are worried.

How can I tell Braxton Hicks from real labour?

Braxton Hicks are irregular, do not steadily intensify, and often stop if you move, rest, or drink water. Real contractions get longer, stronger, and closer together and continue regardless.

Is my timing data saved?

No. Everything runs in your browser and nothing is sent anywhere. Closing the page clears the log, so write down the averages if you want to share them.