The calculators are population estimates
Every result on this site is produced by applying published population statistics to the answers you enter. The output describes what happened across large groups of pregnancies or children with similar answers. It is not a measurement of your pregnancy or your child, and it cannot see anything you did not type in.
What each calculator does not cover
- Labor calculator. Estimates when labor may start on its own. It does not predict a scheduled induction, a planned or emergency cesarean, or the outcome of labor. It uses no clinical examination findings.
- Due date and pregnancy week calculator. Shows conventional dating arithmetic and compares dates. It does not establish or revise a clinical due date. The due date set by your care team is the one used for care decisions.
- Child growth planner. Projects when a child on their current growth channel may reach a height or weight limit. It does not assess whether a child's growth is normal.
- Child height predictor. Gives an adult-height estimate from a published equation with its published error range. It does not diagnose a growth disorder or replace a growth assessment.
- Hospital bag checklist. Is a packing aid. It does not tell you what your birth location provides or requires.
Not medical advice
Nothing on this site is a substitute for the judgment of the person providing your care, who has information the calculators do not. If you have symptoms, a question about a result, or a concern about your child's growth, take it to them.
Sources and errors
Each calculator's sources are listed on its page and on the methodology page. The site's maintainers correct errors when they are reported and verified. If a result appears to be wrong, please report it through the contact page.
Products
Product listings on the hospital bag checklist and elsewhere are examples, not endorsements. Some links are affiliate links and are marked. Always check the manufacturer's current instructions, especially for car seats.
The terms of use contain the full legal statement.