Contraction timer
Time how long your contractions last and how often they come. A free online contraction timer, no sign-up needed.
0:00
Press the button when a contraction starts and again when it ends.
- Contractions
- 0
- Avg. duration (last hour)
- –
- Avg. interval (last hour)
- –
Many care teams suggest calling when contractions come every 5 minutes, last 1 minute, for 1 hour (5-1-1). Follow the advice you were given.
Whatever the timing, call your doctor or midwife right away if your waters break, you have bleeding, severe or constant pain or a fever, your baby is moving less, or you are less than 37 weeks pregnant.
Times are saved only in this browser.
How to time contractions
Duration is the time from the start of a contraction to its end. The interval (frequency) is the time from the start of one contraction to the start of the next.
Irregular tightenings that fade over time or ease with rest are often practice contractions (Braxton Hicks). Labour contractions get steadily closer together, longer and stronger.
Your doctor or midwife decides when you should come in; this timer only helps you measure.
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Koza's contraction timer keeps your history, and your health data stays encrypted on your phone. Your own pregnancy week, due date calculator, kick counter, contraction timer and weight tracking in one app. Free on iPhone and Android.
On a phone, forcell.net/koza opens the store directly.