How Walk Score Is Calculated
Walk Score (walkscore.com) generates a 0–100 walkability score for any US address by measuring the distance to 13 categories of amenities: grocery stores, restaurants, shopping, coffee, banks, parks, schools, books, entertainment, and more. The algorithm uses a decay function where points decrease as distance increases — a restaurant 0.25 miles away contributes more points than one 0.75 miles away.
Amenity proximity is weighted by category importance. Grocery stores and restaurants contribute more to the score than, say, a nearby bookstore. Intersection density (a measure of block size and walkability of the street grid) is also factored in.
What the Numbers Mean
| Score | Category | What It Means |
|---|---|---|
| 90–100 | Walker's Paradise | Daily errands do not require a car |
| 70–89 | Very Walkable | Most errands can be accomplished on foot |
| 50–69 | Somewhat Walkable | Some errands can be accomplished on foot |
| 25–49 | Car-Dependent | Some amenities within walking distance |
| 0–24 | Almost All Errands Require a Car | Very few amenities within walking distance |
Transit Score and Bike Score
Walk Score also calculates two related metrics:
- Transit Score (0–100): Measures frequency and quality of nearby transit service. A score of 70+ means transit is "excellent" and can substitute for a car. Calculated using the frequency of nearby bus, rail, and ferry service weighted by mode (rail scores higher than bus).
- Bike Score (0–100): Measures bikeability based on bike lane infrastructure, hills, road connectivity, and destinations. High scores indicate you can realistically cycle for daily errands.
Highest Walk Score Cities in the US
- New York City: 88 (citywide average) — the gold standard for walkability in the US
- San Francisco: 86 — dense, hilly, and highly walkable in most neighborhoods
- Boston: 81 — compact historic layout makes it naturally walkable
- Philadelphia: 79 — underrated walkability, especially center city
- Chicago: 78 — excellent within the city limits, drops sharply in suburbs
Notably low: Los Angeles (68), Houston (47), Phoenix (41), most Sun Belt metros (30–50 range).
What Walk Score Doesn't Measure
Walk Score is useful but incomplete. Important factors it ignores:
- Safety of walking routes — high crime corridors score the same as safe streets if the amenities are close
- Weather — a 90 Walk Score in Minneapolis or Phoenix is very different in practice than the same score in San Diego
- Quality of sidewalks and crossings — presence of amenities nearby doesn't mean the walking experience is pleasant or safe
- Hills and terrain — San Francisco's hills significantly impact practical walkability even with a high score
- Street-level amenities vs. drive-in format — a Walmart accessible only via a stale parking lot "contributes" to the score the same as a neighborhood market on a walkable street
- Time of day — a neighborhood might be safe and pleasant during the day but different at night
How to Use Walk Score in Your Housing Research
Use Walk Score as a starting point, not an endpoint:
- A score above 70 for your daily-use amenities is a meaningful practical threshold
- Supplement with Google Street View to see the actual walking environment
- Check what specific amenities are contributing to the score — proximity to a busy highway is different from proximity to a neighborhood coffee shop
- Visit in person at different times of day before committing to a neighborhood