Altimeters

Q: What’s the difference between a barometric and GPS altimeter?

A barometric altimeter uses atmospheric pressure to calculate elevation, while a GPS altimeter relies on satellite triangulation for altitude data.

Q: Are altimeters accurate for hiking?

Modern hiking altimeters are accurate within 20–50 feet when calibrated properly and used alongside GPS data.

Q: Do I need an altimeter if I already have a GPS?

Yes — altimeters continue to function when GPS signals are weak or lost, giving you essential elevation and weather trend data.

Q: What’s the best altimeter for backpacking?

The best altimeters for backpacking are lightweight, ABC (Altimeter, Barometer, Compass) models like the Suunto Core or Casio Pro Trek.

Altimeters are essential navigation tools for hikers, climbers, and backcountry explorers who rely on accurate elevation and pressure data in changing environments. At The Outdoor Warehouse, we offer a range of barometric, digital, and wrist-mounted altimeters designed for precision and durability in all conditions.

Whether you’re tracking elevation gain on a mountain trail, calibrating pressure for weather changes, or combining navigation data with GPS and compass readings, our selection of altimeter watches and handheld altimeters delivers reliability when you need it most.

Compare Popular Altimeter Types

Type	Best For	Key Features	Top Brands
Digital Altimeters	Hiking & Mountaineering	Accurate elevation readouts, backlit display, compact size	Sun Company, Silva, Garmin
Altimeter Watches	Everyday Hiking & Training	Combines altitude, barometer, and compass (ABC)	Suunto, Casio Pro Trek
Barometric Altimeters	Weather Monitoring & Climbing	Pressure-based readings, weather trend indicators	Suunto, Brunton
GPS-Integrated Altimeters	Backcountry & Adventure Travel	Combines elevation, distance, and mapping capabilities	Garmin, Coros

Pro Tip

For the most accurate readings, calibrate your altimeter before each trip using a known elevation or GPS reference point. Pair it with a compass or GPS unit for a complete backcountry navigation setup.

How Altimeters Work

Altimeters measure altitude using either atmospheric pressure or GPS data. Barometric altimeters detect pressure changes to estimate elevation, while GPS-based models use satellite triangulation for real-time data. Many modern units combine both methods to deliver more consistent and accurate results, even in shifting weather conditions.

Compact and durable, today’s altimeters are built for rugged environments — featuring waterproof housings, shock resistance, and user-friendly interfaces ideal for outdoor navigation.

Frequently Asked Questions

What’s the difference between a barometric and GPS altimeter?

A barometric altimeter measures atmospheric pressure to determine elevation, while a GPS altimeter uses satellite positioning. Barometric models respond faster to weather and pressure changes, while GPS units provide pinpoint altitude data when calibrated correctly.

Are altimeters accurate for hiking?

Yes — most modern altimeters are accurate within 20–50 feet when properly calibrated. Combining barometric and GPS data improves precision even in changing weather conditions.

Do I need an altimeter if I already have a GPS?

Yes, if you hike in mountainous terrain. GPS can lose signal in deep valleys or heavy cover, while barometric altimeters continue to provide real-time elevation and weather readings.

What’s the best altimeter for backpacking?

Look for a lightweight, multi-function model such as an ABC watch (Altimeter, Barometer, Compass) from Suunto or Casio. These are durable, easy to read, and ideal for extended trips.