Urban Planning & Cities Calculators — United States
Density, land, transport and demand at the scale of a suburb or a city. The arithmetic is the same everywhere; the rates you plug in are local, so they are inputs rather than assumptions.
Density, land & zoning
Population Density Calculator
Population density from people and area — per square kilometer, per hectare, per square mile — with the classification band it falls into and what a growth target does to it.
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Building Height Limit Calculator
How many storeys fit under a height limit — or how tall a given number of storeys will be — from the floor-to-floor heights that ground floors, upper floors and roof plant actually take.
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Zoning Yield Calculator
How many lots or dwellings a site yields once roads, open space and minimum lot sizes are taken out — the number a developer's first feasibility runs on.
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Land Use Mix Calculator
A land-use mix index from the share of land in each use — the entropy measure planners use to say whether a neighbourhood is genuinely mixed or just labelled that way.
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Housing Mix Calculator
The population, bedroom count and average household size a development yields from its mix of studios, one-, two- and three-plus-bedroom dwellings.
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Public Space Ratio Calculator
The share of a district that is public — streets, squares and parks — against the UN-Habitat benchmark of 45 to 50%, and what it would take to reach it.
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Transport & access
Transit Catchment Calculator
The population within walking distance of a station or stop — from the walk time people will accept, their walking speed, the street network detour, and the density around it.
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Walkability Score Calculator
A walkability score from the walking distance to the things people need daily — groceries, school, transit, park, café — with each one decaying past a comfortable walk.
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Service Accessibility Calculator
How many people a facility — a clinic, a library, a school — serves within a travel-time threshold, and how many facilities a district needs so everyone is within reach.
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Parking Demand Calculator
How many parking spaces a development generates under a set of rates, and how much land, area and money those spaces consume — which is why parking is often the largest single cost in a project.
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Modal Share Calculator
The share of trips by each mode — car, transit, cycling, walking — and what a shift between modes does to daily car kilometers and emissions.
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Demand & services
Utility Demand Per Capita Calculator
The demand a population places on a utility — average and peak — from a per-capita rate and a peaking factor, for water, sewerage, power or gas.
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Green Space Per Capita Calculator
Green space per person for a suburb or city, against the WHO minimum of 9 m² and the 50 m² that well-served cities reach — and how much more is needed to hit a target.
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Infrastructure Load Calculator
The load a new development adds to each network — water, sewer, electricity and road traffic — from dwellings, occupancy and per-dwelling rates, in the units each network is sized in.
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Smart Meter Rollout Calculator
How long a smart-meter or sensor rollout takes and what it costs — from meters to fit, installs per crew per day, crews available and the share of visits that fail first time.
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Sensor Network Density Calculator
How many sensors an area needs at a given range — with the overlap a reliable network requires, and the spacing between them.
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Retail Floorspace Demand Calculator
How much retail floor space a catchment can support — from population, spending per person, the share captured locally, and the sales each square meter needs to be viable.
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City Energy Demand Calculator
The electricity a city or suburb uses in a year and draws at peak — from population, per-capita consumption, a load factor, and how much rooftop solar offsets.
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City Water Demand Calculator
The water a city needs to supply — residential, non-residential, and the share lost to leaks — as daily, peak-day and annual volumes.
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Municipal Waste Generation Calculator
How much waste a population generates, how much is diverted to recycling and composting, what goes to landfill, and the truck movements and landfill space it takes.
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Resilience & growth
Sea Level Exposure Calculator
How many years a coastal site has before sea level rize and land subsidence consume its freeboard — under whatever rate of rize you choose to plan for.
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Flood Return Period Calculator
Convert between a flood's return period and its annual probability — and see the chance it happens at least once over a mortgage, a design life or a lifetime, which is the number that actually matters.
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Urban Heat Island Calculator
An estimate of the urban heat island effect from a neighbourhood's hard surface, tree canopy and surface reflectance — and how much cooling more canopy or lighter surfaces would buy.
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Land Value Capture Calculator
The uplift in land value that a rezoning or a new station creates, and how much of it a value-capture mechanism returns to the public — the arithmetic behind infrastructure contributions and betterment levies.
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Urban Growth Projection Calculator
Where a city's population will be in 10, 20 and 30 years at a growth rate — and how much new dwellings and land that needs at a chosen density, split between infill and greenfield.
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About these calculators
These are planning-scale estimates from the standard relationships — density from people and area, demand from population and a per-capita rate, catchment from a walking distance. They are for sizing and comparison, not for a development application: local planning schemes set the numbers that bind.