How does Grow work?

Your Hatch Baby Grow is not your average scale -- it has been meticulously engineered to weigh sleeping babies, swaddled babies, screaming babies, and wiggly babies. So how do we do it?

First, there’s a big difference between weighing an adult and weighing a baby. Quite simply, an adult knows how to stand still on a scale. Your baby, on the other hand, loves to wiggle! Weighing an object that moves is tricky, and requires extra-special engineering to filter out all those wiggles to give you a precise weight.

Unlike a traditional scale, Grow expects that your baby will move (because, babies). Our Hatch Baby Smart Weight Algorithm, designed with a baby’s movement in mind, adjusts based on the amount your baby moves. The scale senses just how wiggly your baby is and factors that into the calculation when weighing your baby. We’ve honed this by taking over a million measurements of babies (this is not an exaggeration - we’re seriously passionate about getting it right!)

Beyond being able to (magically) filter out your baby’s wiggles, Grow is also a super-precise, sensitive device capable of taking measurements from 0 to 44 lbs, at up to a quarter of an ounce of accuracy (we round for convenience!). The “load cells” (aka the things that detect weight) embedded within Grow are sensitive enough to detect minute changes in weight and send signals from the feet of your Grow, spitting out a number that gets calibrated into your baby’s weight. It’s a little piece of engineering magic!

Watching your baby Grow is seriously awe-inspiring. So, as parents, we believe Grow should be used as a tool to monitor and track your baby’s feeding amounts and growth over time. Your baby’s weight and feeding amounts will fluctuate day-to-day (just like an adult!) -- that’s totally normal and no cause for concern. Grow is intended to help you track your baby’s trends.

Having trouble? Need help? Want to be sure you’re set up right? No problem! Email us at and a real, live person on our team can help.

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