How to use the contraction timer
Tap Start contraction the moment a contraction begins, and Stop contraction when it fades. Each entry records two things that matter in labor: duration (how long the contraction lasts) and frequency (the time from the start of one contraction to the start of the next). Keep timing for at least an hour so a pattern can emerge.
The 5-1-1 rule
A common guideline for active labor is the 5-1-1 rule: contractions about 5 minutes apart, each lasting about 1 minute, sustained for at least 1 hour. The timer below shows a live 5-1-1 status based on your last hour of contractions. When the pattern is met, it is a prompt to contact your provider, not a diagnosis - some providers use a 4-1-1 pattern instead, so follow the guidance you were given.
When to call or go in
Most guidance suggests contacting your midwife, doctor, or maternity unit once contractions settle into the 5-1-1 pattern. Go in sooner, or call right away, if your water breaks, you have heavy bleeding, severe or constant pain, reduced baby movements, or you are less than 37 weeks pregnant. Already preparing? Our hospital bag checklist covers what to pack, and the due date calculator helps you see how close you are to your estimated due date.
Frequently asked questions
How do I time contractions?
Tap Start contraction the moment a contraction begins and Stop when it eases off. The timer records how long each one lasts (duration) and how far apart they are, measured from the start of one contraction to the start of the next (frequency). Keep timing for at least an hour so the pattern is clear, and write down or screenshot the summary before you call your provider.
What is the 5-1-1 rule?
The 5-1-1 rule is a common guideline for when active labor may be starting: contractions about 5 minutes apart, each lasting about 1 minute, sustained for at least 1 hour. The NHS and ACOG describe a similar pattern of regular, strengthening contractions roughly 5 minutes apart as the signal to contact your maternity unit or provider. Some providers use 4-1-1 instead, so always follow the specific instructions your provider gave you.
How do I tell real labor from Braxton Hicks?
Braxton Hicks (practice) contractions are usually irregular, do not get closer together, often ease when you move, rest, or drink water, and tend to stay mild. True labor contractions come at regular intervals, gradually get closer together and stronger, last longer over time, and do not stop when you change position. If you are unsure, time them and call your provider.
When should I go to the hospital?
A widely used trigger is the 5-1-1 pattern: contractions about 5 minutes apart, lasting about 1 minute each, for at least 1 hour. Go in sooner, or call right away, if your water breaks, you have heavy bleeding, severe constant pain, reduced baby movements, or you are less than 37 weeks. This tool does not diagnose labor - always contact your midwife, doctor, or maternity unit to confirm what is right for you.
Does the timer save my data?
Your contraction log stays in your browser only, using local storage on this device, so a page refresh keeps your session. Nothing is uploaded to a server. Clearing your browser data or tapping Reset removes the log.
These calculators give estimates based on cycle averages and standard formulas. They are for general information only and are not medical advice. For anything concerning your health or pregnancy, talk to a qualified healthcare provider.