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Garmin Forerunner 255
Garmin

Garmin Forerunner 255

—/100
Comparison indexNot rated
Understanding the 100-point index

The index converts the published five-point rating using a fixed scale. It preserves order and ties; it is neither a new performance measurement nor a quality percentage.

85–100Excellent
70–84Very strong
55–69Good
40–54Notable trade-offs
0–39Limited

For example: 3.0/5 → 36; 4.0/5 → 64; 4.5/5 → 81; 5.0/5 → 100.

Index = 100 × (rating out of 5 ÷ 5)², rounded to the nearest integer.

Equal original ratings keep an equal index. Adding models does not change the scale.

Comparison guidelines

0 points: equal index. 1–7: small gap. 8–14: visible advantage. 15 or more: large gap. These are editorial guidelines, not statistical significance thresholds.

Indices derived from external reviews retain their original rating and source. Methods and dates may differ, so these comparisons do not declare an automatic winner.

A 45.6 mm running and triathlon watch with multi-band positioning and physical buttons. This is the standard Forerunner 255, without onboard music storage.

Mid-rangeReleased 2022
Understanding price segments

A relative scale of each model’s market positioning. It does not represent fixed amounts or current Amazon prices. Promotions, condition and sellers can change the budget needed.

Indicative priceCheck current price
View this model on AmazonNon-Music · 46 mm · Slate Gray — Amazon sends you to an exact local match if available, otherwise search results. Check condition, seller and availability on Amazon.Affiliate link

As an Amazon Associate, Smart Watchers may earn from qualifying purchases at no extra cost to you.

SPECIFICATIONS
Battery life
Up to 14 days; 30 h GPS
GPS
Multi-band GNSS · GPS, GLONASS, Galileo
Display
1.3″ MIP · 260 × 260
Compatibility
iPhone and Android
Water resistance
5 ATM

Manufacturer specifications →

Strengths

  • Multi-band positioning
  • Triathlon and structured training

Weaknesses

  • Check battery condition and software support before buying used.
  • No touchscreen
WHO SHOULD SKIP IT

Choose another model if you need offline music.

Older-generation model: check condition, warranty and currently supported features before buying.

THE VERDICT

Who is it for?

A 45.6 mm running and triathlon watch with multi-band positioning and physical buttons. This is the standard Forerunner 255, without onboard music storage.