Baby Thermometers: Ear vs Forehead — Which Is More Accurate for a Baby?
For babies at home, a good infrared forehead (temporal) thermometer and an ear (tympanic) thermometer are both accurate when used correctly — the most reliable reading comes from using the device properly, every time. Ear thermometers can be very accurate in older babies but are fiddly in tiny ears, while forehead thermometers are quick, gentle and easy to use on a sleeping baby. For newborns under three months, always take a raised temperature seriously and seek medical advice promptly. Here’s how to choose and use each, mum to mum.
Ear vs forehead: the quick answer
Both are infrared thermometers that measure heat — the ear type reads the eardrum, the forehead type reads the temporal artery. Used correctly, both give a reliable guide to whether your baby has a fever. Accuracy problems usually come from technique, not the device: an ear thermometer aimed wrongly or blocked by wax, or a forehead thermometer used over sweaty or sun-warmed skin, will read off. A quality 2-in-1 device that does both lets you cross-check.
Ear (tympanic) thermometers
Pros: fast, and accurate in babies over about six months when positioned well. Cons: a small or curved ear canal (common in newborns) and earwax can affect the reading, so they’re less reliable in the early months. Gently pull the ear back and up to straighten the canal for the truest reading.
Forehead (temporal) thermometers
Pros: quick, hygienic and gentle — you can check a sleeping baby without disturbing them, which is why many parents reach for them first. Cons: readings can be skewed by sweat, a hot room or recent feeding, so wait a moment if your baby is flushed and take a second reading.
What about newborns?
For babies under three months, any fever needs prompt medical attention. Many Australian health services suggest a digital thermometer under the arm (axillary) can be useful for newborns, alongside an infrared device for quick checks. According to Raising Children Network, a fever is generally a temperature of 38°C or higher — and in a baby under three months, that always warrants a call to your doctor.
How to get an accurate reading
- Read the instructions — each model has a slightly different technique and target spot.
- Keep the sensor clean and, for ear models, check for wax.
- Take two readings and use the higher one if they differ.
- Avoid measuring straight after a bath, a feed, crying or time in a warm car.
- Track the trend and how your baby is behaving, not just one number.
For more on device accuracy, see how accurate is your baby thermometer, what counts as a normal baby temperature, and our practical tips on handling a baby fever.
So which should you buy?
If you want one device to cover the whole journey from newborn to toddler, a 2-in-1 infrared ear and forehead thermometer is the most flexible choice — forehead for fuss-free checks and sleeping babies, ear for a quick cross-check as they grow. Cherub Baby’s baby thermometers are designed to be fast, gentle and easy to read at 3am. They also make a genuinely useful addition to a new-parent gift pack.
Frequently asked questions
Is an ear or forehead thermometer more accurate for a baby?
Both are accurate when used correctly. Ear thermometers can be very accurate in babies over six months, while forehead thermometers are easier and gentler to use, especially on newborns and sleeping babies.
What temperature is a fever in a baby?
A fever is generally 38°C or higher. In a baby under three months, any fever warrants prompt medical advice.
Can I use an ear thermometer on a newborn?
It’s less reliable in the early months because newborn ear canals are small and curved. A forehead thermometer or a digital under-arm reading is often easier for newborns.
Why do my two thermometers give different readings?
Different methods measure slightly different sites, and technique matters. Take two readings, use the higher one, and focus on the trend and how your baby seems.
Where should I take my baby’s temperature?
Follow your thermometer’s instructions. Forehead and ear are common; under-arm with a digital thermometer suits newborns. Avoid readings right after a bath, feed or crying.
When should I see a doctor?
Seek advice for any fever in a baby under three months, a temperature that stays high, or if your baby is unusually sleepy, feeding poorly, hard to settle or you’re worried.
