Pre-centered radius maps for 25 major cities across 4 continents and 14 countries. Skip the address search — each link opens the radius tool already focused on a known landmark, with a starting radius that fits the city's scale.
Every city page is hand-authored: real coverage tables (what falls inside a 5 km or 10 mi radius from a named anchor), local use cases used by professionals in that market, and geographic quirks (water, mountains, density gradients) that change how a radius behaves there.
Tap a marker to jump to that city's dedicated radius map. Pinch to zoom; the scroll-wheel is disabled so the page itself stays scrollable.
A city radius map is the standard “everything within X distance of point Y” tool, but pre-configured for a specific city. Instead of typing an address into a generic mapping tool, you land on a page that's already centered on the city's most recognizable anchor (Times Square, the Loop, Charing Cross, Alexanderplatz, Shinjuku Station) with a sensible starting radius. From there you can move the center, change the radius, and export — same controls as the main tool, just without the “find the address first” step.
The reason to maintain per-city pages instead of one generic interface is that what makes a radius useful is heavily local. A 10-mile radius from downtown Phoenix covers suburban sprawl that's functionally one continuous market; a 10-mile radius from downtown Manhattan covers five distinct boroughs, two rivers, and three different transit-system catchment areas. The geometry is identical; the meaning isn't. City pages give you a starting frame that already reflects the local meaning, plus hand-authored content describing what does and doesn't fit inside the typical radii local planners and professionals actually use.
Each page is intentionally small in scope: one tool, one city, one set of coverage examples. You won't find auto-generated filler. If a city is listed here, someone looked at the geography, picked a landmark, ran through the common use cases, and wrote the page by hand.
The math is universal — a 10 km radius covers π · 10² ≈ 314 km² in every city on Earth. What changes is what fills that 314 km² of land area, and crucially, how much of it is even land.
The city pages document the specific quirk that matters for that city, so you don't have to learn each one the hard way.
All 25 cities, grouped by continent. Each card carries the hand-authored note about what makes that city's radius behave the way it does — tap any card to open its full page.
Manhattan is roughly 13 miles long but only about 2.3 miles wide at its broadest, so any radius drawn from midtown crosses water on at least two sides before it grows past 1 mile.
Greater Los Angeles spans roughly 500 square miles of basin and valley, so a 10-mile radius from downtown is genuinely "central LA" — Hollywood is in, but Santa Monica and Long Beach are not.
Chicago is laid out on a numbered grid centered at State and Madison. Every 8 city blocks equals roughly 1 mile, so a 5-mile radius covers about 40 blocks in every direction — a useful trick when sketching a service area without a tape measure.
The Greater Toronto Area stretches roughly 100 km along Lake Ontario's north shore — Burlington in the west to Oshawa in the east. A 15 km radius from Yonge & Bloor reaches the inner GTA but stops short of Mississauga or Markham.
San Francisco proper fits inside a 7-mile radius — the city limits stop at the peninsula tip, and most of any radius drawn from Union Square falls into San Francisco Bay or the Pacific Ocean.
Boston proper is the third-densest US big city by area but one of the smallest by city limits — a 5-mile radius from Boston Common covers the whole city plus inner Cambridge, Brookline, and Somerville.
Seattle is squeezed between Puget Sound to the west and Lake Washington to the east — both bodies of water sit within 4 miles of downtown, so a radius drawn from Pike Place loses major area to water on both sides.
Miami metro is unusually linear — squeezed between the Atlantic Ocean and the Everglades, the urbanized strip is only 10–12 miles wide but stretches 100+ miles from Florida City to Palm Beach.
The District of Columbia is only 68 square miles and fits inside a 5-mile radius — but the I-495 Capital Beltway, the practical edge of "DC", sits at roughly 10 miles from the White House.
Vancouver sits between the North Shore Mountains, the Strait of Georgia, and the US border — the urbanized strip is only about 30 km wide, and a 25 km radius from downtown reaches the US border at Blaine, Washington.
The Greater London boundary is roughly 32 km across at its widest. A 10 km radius from Charing Cross fits comfortably inside it — a 25 km radius reaches all the way out to the M25 in most directions.
Greater Manchester contains 10 metropolitan boroughs across roughly 50 km × 30 km. A 15 km radius from Piccadilly reaches almost every one of them — a useful fact for catchment planning across the conurbation.
The City of Paris (intramuros) is bounded by the Boulevard Périphérique, a near-circle with a diameter of about 10 km. A 5 km radius from Notre-Dame fits the entire 20 arrondissements inside.
Berlin covers roughly 891 km² — about the same area as New York City's five boroughs combined. A 10 km radius from Alexanderplatz roughly traces the S-Bahn Ringbahn, the inner ring line.
Madrid is encircled by four orbital motorways — M-30, M-40, M-45, M-50 — at roughly 7 km, 14 km, 19 km, and 25 km from the centre. Each ring marks a real shift in urban character.
Rome is encircled by the Grande Raccordo Anulare (GRA), an orbital motorway that sits about 11 km from the centre. A 10 km radius from the historical core lands just inside the GRA on most sides — a clean proxy for "inside the ring".
Dublin's M50 ring road sits roughly 8–10 km from O'Connell Bridge and forms the practical outer limit of the city — most of the Greater Dublin Area is within a 25 km radius of the centre.
Amsterdam is unusually compact — the entire city centre fits inside a 3 km radius from Dam Square, and a 10 km radius covers most of the city plus Schiphol Airport and the inner Amsterdam metropolitan ring.
Barcelona is wedged between the Mediterranean Sea and the Collserola hills, so its urban area is unusually narrow — the entire city fits inside a 7 km radius from Plaça de Catalunya, and the metro extends primarily north-east and south-west along the coast.
Munich is one of the most circular major cities in Europe — its medieval centre, S-Bahn ring, and Mittlerer Ring autobahn all form near-perfect circles around Marienplatz, making radius-based analysis unusually clean.
The Yamanote Line forms a 34.5 km loop around central Tokyo and serves 30 stations — one of the densest and most-used rail loops on Earth. A 5 km radius from Shinjuku covers most of the Yamanote interior.
Singapore is so small that a 25 km radius from Marina Bay covers the entire country plus parts of Malaysia (Johor Bahru) — it's the only major city where a single radius can cover the whole sovereign nation.
Hong Kong is split across Hong Kong Island, Kowloon, and the New Territories — a 10 km radius from Statue Square covers most of the urban core, but mountainous terrain means the full SAR requires a 30+ km radius.
Sydney spans more than 70 km from the Pacific coast to the Blue Mountains foothills and covers over 12,000 km². A 15 km radius from the CBD covers the inner suburbs but stops well short of Parramatta — the metro's second CBD — at 23 km.
Auckland is built on an isthmus less than 2 km wide at its narrowest, with the Waitematā Harbour to the east and the Manukau Harbour to the west — a radius drawn from the city centre crosses both harbours within 5 km.
The default on each city page is a reasonable starting point, but the right radius depends on what you're trying to learn. A rough guide:
Foot-traffic radius for a specific storefront, station-walking distance, single neighborhood block analysis. Japanese station-walking listings use 500 m and 800 m as the de-facto property-search anchors.
15-minute-city screening radius (1.2 km at 5 km/h walking pace), food-delivery zones in dense areas, neighborhood-level trade areas. Most useful in cities with continuous walkable street grids.
Default for most European capitals (London uses 10 km from Charing Cross), inner US metros (NYC 5 mi from Times Square covers most of Manhattan plus the closest outer-borough ringland), and typical commute analysis. This is the most-commonly-useful range for “city-scale” questions.
Sprawling US metros (Los Angeles 10 mi just covers downtown plus adjacent neighborhoods, but 25 mi catches most of the metro), Sydney's full inner-area radius from the CBD, regional planning zones. Common for service-area and franchise-territory work.
Day-trip planning, regional sales territories, hospital service areas, freight short-haul. At this scale, terrain and road networks dominate over straight-line distance — check the city's drive-time map for an honest view.
When in doubt, open a city page, click a few preset values, and visually check what falls inside each circle. The right radius is almost always the one where the circle looks “about right” for the question you're asking.
Agents and house-hunters use city radius maps to show “what’s within X miles of this property” — schools, transit, hospitals, parks. Different cities need different default radii (3 mi in Manhattan, 10 mi in Houston) for the same lifestyle question. The city pages spell out which radius is meaningful where.
Restaurants, retailers, and logistics teams define zones around a depot or storefront. Coastal cities lose half of any radius to water; sprawling cities need bigger radii than dense ones. The city pages list typical local conventions — a 3 mi food-delivery radius in Brooklyn means something different than 3 mi in Atlanta.
Planners use straight-line radii as a screening tool before more expensive isochrone work — “is this park within a 1 km radius of every census block?”, “does this hospital cover a 25 km service area?” Each city page documents whether straight-line is realistic or whether terrain/water makes it misleading.
Event organizers test “how many residents live within a 5 km radius of this venue?” as a first-pass attendance estimate. Marketing teams use radius maps to define direct-mail or geo-targeted ad audiences. The defaults on each city page reflect the radii actually used by professionals in that market.
Visitors use radius maps to scope a city before arriving — “how far is the airport from downtown?”, “what’s walkable from my hotel?” Each city page is pre-centered on a known landmark, so you can change the radius in seconds without first finding coordinates.
For deeper guides on industry-specific use cases, see the full use cases page.
What this site is built on and what we read while building it.