Change the units (°C/°F, km/h, knots, kg/lb, metres/feet)

Alexa

Alexa

Last updated on Oct 12, 2026

This guide shows you how to change the units the app uses for temperature, wind, pressure, tide, waves, length, weight and distance.

Steps

  1. Open the Profile tab.
  2. Tap the gear button in the top right corner.
  3. Tap Units.
  4. Tap a row and choose the unit.

The change applies at once, everywhere in the app.

The units you can choose

Row Options Used for
Temperature Celsius (°C), Fahrenheit (°F) air and water temperature
Wind Kilometers / Hour, Miles / Hour, Knots, Meters / Second wind and gusts
Pressure Hectopascal (hPa), Inches (inHg) air pressure
Tide Meters, Feet tide height
Wave Meters, Feet wave height
Length Centimeters, Inches the length of a catch
Weight Kilograms, Pounds the weight of a catch
Distance Kilometers, Miles "… away" distances and the facts about a water

Good to know

  • The defaults follow your iPhone's region. In the United States the app starts with °F, mph, inHg, feet, inches, pounds and miles; elsewhere with metric units.
  • Knots and metres per second are never the default — choose them in the Wind row.
  • Changing a unit changes only how values are shown. Your saved catches are not altered.
  • In kilograms, a weight under 1 kg is shown in grams (for example 850 g). Pounds are shown as decimals (5.2 lb); there are no ounces.
  • Rain is always shown in millimetres and the wave period in seconds.
  • The forecast always uses a 12-hour clock (AM/PM).
  • The units are saved on your phone and work offline.