Better measure calorie burn, understand resting heart rate & more with 24/7 heart rate tracking and a battery life of up to 7 days (varies with use and other factors); charge time (0 to 100 percent) 2 hours
Choose from 15 plus exercise modes like run, bike, swim, yoga, circuit training and more, set a goal, and get real time stats during your workouts to see how you can keep getting better
Automatically record time spent in light, deep and REM sleep stages, see Activity trends, healthy insights, and personalized guidance in one place with Fitbit today. Operating temperature is -10° to 45° Celsius
Swim proof and water resistant to 50 meters, so you can track swims and wear in the shower; we do not recommend wearing charge 3 in a hot tub or sauna; also connect to smartphone GPS for real time pace and distance during outdoor runs and rides
Stay connected to your day with everyday apps for weather and more and get called, text and smartphone app notifications on your wrist; small wristband fits a wrist between 5.5 to 7.1 inches; large wrist band fits a wrist between 7.1 to 8.7 inches
Radio transceiver: Bluetooth 4.0. Syncing range up to 6 meters
Battery and Power
Fitbit Charge 3 has a battery life up to 7 days. Battery life and charge cycles vary with use, settings, and other factors; actual results will vary. We recommend charging your tracker every few days to ensure you are always tracking.
Battery type: Lithium-polymer
Charge time (0-100%): Two hours
Radio transceiver: Bluetooth 4.0
Saves 7 days of detailed motion data – minute by minute
Saves daily totals for past 30 days
Stores heart rate data at 1 second intervals during exercise tracking and at 5 second intervals all other times
Fitbit Charge 3 is water resistant to 50 meters. After swimming or getting the band wet, we recommend drying the band because, as with any wearable device, it’s best for your skin if the band is clean and dry. We do not recommend wearing Charge 3 in a hot tub or sauna. See for more details.
If the band gets wet or if you sweat in it, remove and completely dry the band before putting it back on. Give your wrist a rest by taking the band off every now and then. Learn more.
The Fitbit Charge 3 classic band is made of a flexible, durable material similar to that used in many sports watches, and includes an aluminum buckle. The woven band is made from a comfortable polyester and includes an aluminum buckle.
Like all heart rate tracking technologies, accuracy is affected by physiology, location of device, and different movements.
Operating temperature: -10° to 45° C
Maximum operating altitude: 8,535 m
Fitbit Charge 3 syncs automatically and wirelessly to computers and 200+ leading iOS, Android & Windows devices using Bluetooth LE wireless technology.
Syncing range: Up to 6 m
Certain features like smartphone notifications may require Android 5.0+. Check your device compatibility.
Syncing requires Bluetooth LE and Internet connection. Windows 10 computers that do not have Bluetooth LE will need a wireless sync dongle in order to sync.
Syncs with iOS 10 and later, Android 5.0 and later and Windows 10 devices.
Print this guide to find the right size for you. Both small and large sizes included in box.
Small fits wrists 140 mm – 180 mm in circumference
Large fits wrists 180 mm – 220 mm in circumference
Screen size: 19.9 x 34.5mm
Window diagonal: 39.83mm