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Tools for Green Architecture, Design & Building


Many of these tools are free online. If not, the tool is listed as "fee-based." These tools can help you design and build sustainably!

All Tools

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2030 Palette
Interactive web platform for planning sustainable communities worldwide


AAMASKY Skylights and Daylighting (Fee-based)
Heating, cooling, and lighting energy consumption attributable to skylights in commercial buildings


Adeline
Analyze daylighting and lighting in commercial buildings


AGI32
Software for design and renderings for electric and daylighting analysis


AGi32 Lighting Design Software (fee-based)
Lighting analysis software


Alert Me (UK)
Virtual solar panel tool


ApacheLoads (fee-based) (UK)
Performs heat loss and heat gain design calculations


APOS Photovoltaic StatLab
Analysis and the quality assessment of photovoltaic (PV) modules


ArchiPhysics Daylight Software (Free)
Shows how daylight will be distributed in a room


ArchiPhysics Passive Solar Software (Free)
See how different variables affect the indoor temp


ArchiPhysics-Daylight
How daylight is distributed in a room


Awnshade Software
Window shading design and analysis software


BEES (Building for Environmental and Economic Sustainability)
Building products evaluation software for environmental performance


BLAST (Building Loads Analysis and System Thermodynamics) - FREE
Merged with DOE2 to Become Energy Plus


Build It Solar
Extensive website devoted to do-it-yourself solar


Building Benchmarks
CBECS data in readable format


Building Design Advisor (USA)
Supports the integration of multiple building models


Building Efficiency Calculator
Simple calcs show energy efficiency based on size, annual energy bill


Building Energy Software Tools Directory
Alphabetical list of tools


Buildings Industry Transportation Electricity Scenarios (BITES)
Explore the energy and carbon implications of altering the U.S. energy profile


Buildings Performance Database (USA)
Thousands of commercial and residential buildings can be compared


California Solar Resource Calculator for Tilted Surfaces
Compute solar radiation on tilted plane in California


Carbon FoodPrint
Strategy to lower carbon footprint of foodservice operations


CASAnova 3.3 (free download)
Software for heating and cooling energy demand in buildings


CBECS (Commercial Buildings Energy Consumption Survey) USA
US national data on commercial buildings' energy use


Chhaya 2.0
Optimize glazing size and orientation, shading and natural ventilation


Climate Consultant
Energy Design Tool


CoDePro -- Flat Plate Collector Design Program
University of Wisconsin Madison


Collector Efficiency Calculator
from Build It Solar


COMFEN 2.1 beta
Alternative fenestration systems for project-specific commercial building applications


Commercial Water Calculator
Water use in commerical buildings


Compost Calculator
Find the best mix of ingredients for great compost


Concrete Crack Calculator
Find your local conditions via zip code


Construction R-Value Calculator
Calculates R-value of common insulated wall and roof constructions


Cool Calc Peak Cool Roof Calculator
Estimates for large facilities on cooling / heating savings


Cool Roof Calculator
Estimates cooling/heating savings for small to medium size facilities


Cradle-to-Cradle Certified Products
List of C2C products made with safe and recyclable materials


CREAT (USA)
Climate Resilience Evaluation & Awareness Tool for Water Assessments


Data Plotting Program
Chart data gathered from monitoring stations


Daylighting Pattern Guide
20 unique daylight patterns described


Degree Day Charts - Free
from Weather Data Depot


Degree Days Calculator for IPM (California)
You can run preset models


Degree Days Charts (Global)
Weather data for energy professioanls


Design Advisor MIT (USA)
Daylighting, natural ventilation, energy and comfort.


Design Builder Software (fee-based)
Building energy, CO2, lighting and comfort performance


DIAL Europe (Fee-based)
Daylighting tool for Europe


DOE-2
Calculates the hourly energy use and energy cost


DSIRE (USA)
Up-to-date, comprehensive database of US renewable energy incentives


DSIRE Solar (USA)
Up-to-date, comprehensive database of US solar incentives


E-Quest Energy Simulation Tool
Building energy use analysis tool


E-Scale or EnergySmart Home ScaleSM
Home energy rating tool from USDOE


Eco-Specifier (FEE-Based)
Database of 3500 eco-products, eco-materials, technologies and resources


EcoAdvisor
Interactive guidance on achieving sustainable buildings


EcoCalculator for Buildings from the Athena Instit
Evaluate buildings & assemblies using life cycle assessment (LCA) methodology


EcoLogo Products Database
Thousands of products filterable by type and manufacturer


EcoScorecard Products Database
Manufacturers' product catalogs searchable for eco features


EcoTect Design Tools (Fee-based)
from Autodesk


Electric Load Estimate Worksheet
Worksheet to calculate load


Embodied Energy Calculator
Measure the embodied energy in an existing building


Emissivity of Materials Chart
Paints, coatings, metals, masonry, etc.


Energy CAP (Fee-Based)
Utility bill tracking software


Energy Demand Calculator (Czech Republic)
Calculate heat loss, gain, consumption using spreadsheets


Energy Gauge
Energy and Economic Analysis Software for Commercial and Residential


Energy Grid IQ (USA) (Fee-base and FREE)
Location-based database of energy projects & incentives


Energy Modeling Software Tools Directory (USA)
Directory of building energy and water use computer modeling tools with links


Energy Plus Energy Simulation Software
Free downloadable tool


Energy Star Home Energy Yardstick (USA)
Compare a home's energy efficiency to similar homes


Energy Star Products
List of energy effcicient appliances, windows, HVAC, lighting


Energy-10 Energy Simulation Software (fee-based)
Analyzes and illustrates a building's energy and cost savings


Envest II (Fee-Based) (UK)
Environmental Impact Assessment and Life-Cycle Cost Analysis for Buildings


Environmental Impact Estimator for Buildings from Athena
Evaluates buildings & assemblies using life cycle assessment (LCA) methodology


Envision Sustainable Infrastructure Rating System (USA)
Framework for evaluating and rating the community, environmental, and economic benefits of infrastructure


Free Energy Modeling Software
Google SketchUp


FRESA (USA)
Analyze the use of renewable energy technologies for buildings and facilities


FSC Certified Products, Species and Companies
Searchable database of certified forests and wood products


Fuel Comparison Calculator
from Build It Solar


Green Building Products Database (EU)
Products described for their green criteria


Green Flight Carbon Offset Calculator (Australia)
Offset travel via airplane


Green Roof Energy Calculator
Compare vegetated roof with dark or white roof


Green Seal Products Database
Life-cycle-based third party certified eco products


Green Spec (Fee-based)
Online Building Product Guide


Green Streets Calculator
Using concrete pavement to save energy on roadways


Green Wizard
Collaborative tools for every stage of a green building project


Green Wizard (Fee-based)
Software to identify, compare, evaluate, and model building products


Green Wizard Energy Reduction Calculator
Calculate projected energy use to determine compliance with 2030 Challenge goals


Greener Product Database
Products that meet NAHB and LEED credits


GreenGuard Products List
Certified healthy products


Greenius (German - free download)
Renewable energy evaluation


GreenSpec Product Guide (Fee-Based)
Extensive product analyses with green attributes


H2O Conserve Calculator
How much you use and how to conserve water, not just at home


Heat Gain and Loss Short Form Calculator
Quick residential calculator for MrHVAC


HEED Free Software (USA)
Home Energy Efficient Design


Home Energy Efficient Design (HEED)
Free downloadable tool


Home Energy Report Online Tool (USA)
Calculate Your Home's Potential Energy Savings


Home Energy Saver
Do-It-Yourself Energy Audit Tool


Home Heat Loss Calculator (USA)
Estimate of the heat loss for your home


HOMER (free registration)
Off-grid and grid-tie simulation software


Horizon (fee-based - Germany)
Das HorizON Prinzip


How Many Solar Panels Do You Need Calculator?
Calculate how many solar panels you need


I-BEAM
Indoor Air Quality Building Education and Assessment Model


iLevel Wood Sizing Software
Size joists, beams, posts and studs


In My Backyard (USA)
Estimates electricity you can produce with PVs at your site


INsel (fee-based)
Graphical programming language for simulation of renewable energy systems


Landscape Calculators
Amount of mulch, plants, stone or lawn


LESO ACOUSALLE (Fee-based)
Planning and Analysis of Acoustics of Indoor Spaces


LESO-Cool (fee-based)
Cooling through Natural Ventilation and Thermal Movements


LESO-Daylighting (Fee-based)
Daylighting design software


Light Penetration Tool
Sustainable by Design


Lighting Pay-Off Calculator
Incandescents vs fluoresecents


Louver Shading Tool
from Sustainable by Design


Measurement and Instrumentation Data Center (USA)
Irradiance and Meteorological Data


Mercury In Buildings
Software that helps find and reduce mercury in buildings


MeteoNorm (fee-based Global)
Meteorological database for solar energy


Michigan Wind Prospecting Tool (USA)
Best areas in Michigan for utility scale wind farm development and community wind development


MIMOA Modern Architecture Guide (Europe)
Map buildings in Europe with this excellent online database


Minnesota Building Materials Database
Listing of sustainable materials organized by CSI


NABERS (Australia)
Assesses the greenhouse emission intensity of office buildings


NASA World Wind Tool
World Wind SDK for Java


National Climatic Data Center (USA)
World's largest active archive of weather data


National Green Values™ Calculator
Compare low impact development to conventional stormwater partices


Off-Grid Energy System Size Calculator
Calculate size of your home power system


Online Wind Calculator (Maryland, USA)
Figure out wind resources for your site in maryland


Overhang Design Tool
Sustianable By Design


Panel Shading Visualization Tool
Shading of parallel rows of flat solar collector panels


Parabola Drawing Tool
Create this simple tool for drawing parabolas


Parasol (Sweden)
Energy simulation tool for comparison of energy demand


PGE Smart Energy Analyzer
Analyze a home's energy consumption (PGE customers)


Pharos Project (Fee-Based)


Photovoltaic Power Model Software
Free software to evaluate for photovoltaics


Photovoltaic: PV CoSim+
PV cost simulation software


Pilkington Sun Angle Calculator
Determining solar geometry variables for architectural design


Planning Tree Windbreaks (Missouri, USA)
Using windbreaks fro energy efficiency


Psychrometric Chart from Trane
Downloadable


Psychrometrics Calculator for Air Properties
Calculate indoor air conditions


Psychrometrics Calculator for Mixed Air Properties
from Trane


PV Design Pro (USA)
Simulates photovoltaic system operation on an hourly basis for one year


PV F-Chart Software (fee-based)
PV system design and analysis


PV Professional (German/Italian - fee-based)
PV planning for flat or sloped roofs


PV String Sizing Tool Download
Professional layout and design of grid-connected photovoltaic systems


PV String Sizing Tool Online
Sizing tool access on a mobile device or online from KACO


PV Value Tool (USA)
Spreadsheet tool to determine value of new or existing photovoltaic (PV) system


PV WATTS Calculator v 1.0
calculates electrical energy produced by a grid-connected photovoltaic (PV) system


PV WATTs Version 2
Estimates performance data for any location in the United States


PV-Sol Software for Photovoltaics (fee-based)
Simulation for design and calcs of grid-connected systems


PVCad Design Software for PV Facades
Computer tool for fast and efficient planning of PV facades


PVGIS Estimation Utility (Europe)
Estimate solar electricity generated in European city or country


PVsyst (fee-based)
Photovoltaic system analysis


R-Value Calculator by Zip Code (USA)
Determines economic insulation level for your residence


R-Values Table for Materials
Average R-value for many building materials


Rain Xchange Rainwater Design Calculator (USA)
Calculates collection area and estimates amount of rainwater collected


Rainwater Calculator (Australia)
Calculate Annual Rainfall Volume


Rainwater Collection Calculator
Calculates collection area and estimates amount of rainwater collected


Rainwater Collection System Sizing
Determine catchment area and water use demand


Rainwater Harvesting Calculator (Seattle WA)
Calculate your size requirements for Seattle rainfall


Rainwater Harvesting Calculator (UK)
Calculate your rainwater collection system size


Rainwater Harvesting Calculator for Texas, New Mexico, Arizona
Online calculator for catchment area, storage and landscape use


RE Atlas (USA)
Renewable energy interactive atlas of the USA


READ (USA)
Renewable Energy And Defense Geospatial Database


Regional Energy Efficiency Database (US Northeast Region)


RESFEN 5.0
Windows and Daylighting Software


RETScreen Clean Energy Analysis Software
Evaluate energy production for various types of renewable energy


Roanakh Designs for Solar Electricity
Step-by-step guide to designing a solar power system


ROI Analysis for SOLR Roofing Panels (FREE)
Detailed look at costs and benefits for SOLR panels


Roof Ray Solar Potential Calculator
Calculate your roof's solar potential


Roof Savings Calculator
Cool roof savings estimator for commercial and residential buildings


SCS Certified Products Database
Scientific Certification Systems certified eco products


SEES (Solar Energy from Existing Structures) Software
Simulates spatial variations of potential PV energy production on roofs in urban areas


Shadow Analyzer (fee-based)
Analyzes shadow effects of solar equipment or nearby objects


Shadows (free for basic level)
Software to design sundials and astrolabes


Sizing Solar Pool Heaters (Florida, USA)
Simple method to determine solar collector area


Sizing Solar Water Heater Tool (Florida, USA)
Residential solar hot water systems


SketchUp (Free)
Create 3-d models using GoogleEarth.


SkyCalc Software Tool for Skylighting
Determine the optimum skylighting strategy


Small Wind Toolbox
Installation, operation, approval, markets, zoning, etc.


SMARTS - Simple Model of the Atmospheric Radiative Transfer of Sunshine
Predicts clear-sky spectral irradiances


Sol Path Sun Path Calculator
from Sustainable by Design


SolaCalc (UK)
Passive solar design performance simulation


Solar Air Heater Software and Data
Evaluate energy production for solar air heating projects


Solar Analysis Widget (USA)
Online tool to see your solar power potential


Solar Array Size Calculator
Calculate solar array size from SRoeCo


Solar Battery Bank Designer
Design tool to show how to wire battery bank


Solar Calculator (USA)
Estimate size and cost of solar power system in USA


Solar Calculator (USA)
Calculate amount of electricity from sun


Solar Calculator for New Orleans
Estimate the solar potential of a roof in New Orleans


Solar Collector Design Program
Compute efficiency of your own solar collector design


Solar Cost Calculator
Calculate your solar costs from SRoeCo


Solar Design Tool for Grid-Tie Systems
Design and configure optimal solar power systems


Solar Energy Electric Power System Simulator
Demonstrate the basic operation of a solar electric power system


Solar Energy System Sizing Estimator
How many Solar Panels you will need to generate electricity?


Solar Estimator (USA)
Estimates size and calculates the cost of solar system


Solar Noon Calculator Printable (Global)
Find the exact time of solar noon for your location


Solar Panel Shading Calculator
from Sustainable by Design


Solar Pathfinder-Solar Site Analysis (Fee)
On-site accurate measurement of shading of any site


Solar Position Calculator
Solar zenith angle, declination, equation of time, etc.


Solar Position Calculator by NOAA (Global)
Find sunrise, sunset, solar noon for anyplace on earth


Solar Power Calculator (USA)
Estimate the cost and size of a solar energy project


Solar Power Forecasting (fee-based)
Focuses on short-term markets


Solar Power Rating Map (USA)
Estimates net cost for a solar power system for each state


Solar Radiation Data Manual for Buildings
Free, downloadable data tables for calculating sol


Solar Radiation Data Manual for Buildings (USA)
for a horizontal window and four vertical windows


Solar Radiation Data Manual Online (USA)
for Flat-Plate and Concentrating Collectors


Solar Rating (Canada and USA)
Determine a homes' suitability for solar technology


Solar ROI Calculator
A return on investment calculator for roof panels


Solar Savings Calculator for Residential (USA)
Calculate savings for using the REnu solar rental


Solar Site Survey (USA)
One-page solar resources map fro US


Solar Sizer
Solar system sizing tool


Solar Tool for Cambridge, Massachusetts, USA
Annual electricity yield map from PV for virtually all Cambridge MA rooftops


Solar Water Heater Calculator
Explore the energy usage of your water heater


Solar Water Heater Software
Evaluation tool for solar water heating global


Solar Water Heating Calculator
explore the energy usage of your water heater


SolArch (UK)
Soalr Architecture Design Tool


SOLinvest Pro (German - fee-based)
Economic analysis of renewable energy systems


SOLinvest Standard (German - fee-based)
Basic economic analysis of renewable energy systems


SolPath Tool
graphical representation of the sun's apparent path


Sombrero 3.01 (Germany)
Solar shading, radiation, systems and building geometry


SPOT Sensor Placement Optimization Tool
spreadsheet-based tool for specific photosensor manufacturers


SRI (Solar Reflectance Index) Calculator Worksheet for Cool Roofs
Calculate the SRI for Roofing Products


SRoeCo Solar
Solar panel comparisons, costs, array size calculators


State Solar Incentives (USA)
Database of state and federal incentives for solar


Stellarium
Open Source planetarium for your computer


String Sizing Program for Photovoltaics
Approximate PV module string sizes


Sun Angle Tool
Calculates solar angle data


Sun Eye (fee-based)
Accurately measure solar access and shading


Sun Math Solar Calculator 1.0 (USA)
Financial evaluation of the cost of solar in your area


Sun Path Chart Program
Sun path charts in Cartesian coordinates


Sun Position Calculator
Calculates an array of solar angle data


Sun Position Info
Calculate sun position with drop-down menus


Sun Position Tool
Calculates an array of solar angle data


SunAngle Calculator
Solar angles based on location, date, and time


SunAngle Professional Suite
Sophisticated version of SunAngle


Sundi (Germany)
Simulation program for irradiance calcs and shading analysis


Sundial
Make a Paper Sundial


Sundial Registry
Photos, locations and descriptions of sundials all over the world


Sundial.net
Online web resource for sundials


Sunpath Software
Determine position of the sun in the sky at various locations


SunPower Estimator (USA)
Calculates 25-year savings from solar electricity


SUNREL
Energy simulation software


Sunrise/Sunset Calculator (USA)
for any location and any date


Sustainability Toolkit (Free, Online)
Developed by US Air Force with many strategies


Sustainable By Design
Design tools online for solar


Sustainable Facilities Tool (USA)
Track your sustainable project for free from GSA


Sustainable Measures (North America)
Create indicators of sustainable community


T-Sol Professional (fee-based)
Simulation for design of solar thermal systems


Terra Org Carbon Calculator (Spanish)
de emisiones de carbono emitidas a la atmósfera


Therm
Model two-dimensional heat-transfer effects in building components


Trane TRACE 700 (fee-based)
Optimize the design of building’s HVAC based on energy utilization & LCA


Transit Benefit Calculator (USA)
Measure the benefits of transit investments for communities


TRNSYS
Transient systems simulation program


US Renewable Energy Resourses Interactive Atlas


Utility Trac (Fee-Based)
Audit, track and analyze utility usage in buildings


Vertical Fin Shading Tool
calculate the shading provided by vertical fins


Video Conferencing Calculator
Travel meeting versus video conferencing


Virtual Wind Tool (fee-based)
3D wind flow modeling and visualization


Voltage Drop Calculator Tool
approximate voltage rise in the AC circuit


Water Budgets Water Use Calculator
How much water does your home use?


Water Calculator (UK)
What's your water use per day?


Water Consumption Calculator
Where and how much water do you use?


Water Footprint Extended Calculator
How much water do you use based on the products you consume?


Water Meter Calculator (UK)
Calculate your savings from installing a water meter


Water Neutral Offset Calculator
Travel to South Africa in a water-neutral way


Water Usage Calculator (Thames, UK)
Calculate your home water use


Water Usage Calculator for Cooling Towers
Calculate water useage for cool towers


Water Use Calculator
Find your water use patterns at home


Water Use Calculator (Australia)
Home water use calculator for Australia


Water Use Calculator Commercial Buildings
Estimate your building's water usage


Water Use Calculator Fair Oaks
Find out your water use at home


Water Use Calculator SWFMD
Find how much water you use at home


WattzOn
Free rebate calculator for the US


WeGo Wise Utility Usage Calculator (Fee-Based)
Understand water usage in your building


Wind Chill Calculator
Calculates combination of wind speed and air temperature


Wind Energy Finance Calculator (USA)
Calculate a wind project's cost of electricity


Wind Estimator (USA)
Estimates size and calculates the cost of wind system


Wind Power Prediction Tool (fee-based)
Generate short-term predictions of wind power production


Wind Project Calculator (USA)
Cash flow modeling for community wind projects


Wind Propespecting Tools (Fee-based)
Calculate wind potential at your site


Wind Turbine Software
Evaluate wind power


Wind Yield Estimation Tool (UK)
Estimate the local annual mean wind speed


WindCast Forecasting Tool
Current wind speed and direction for the most recent hour


Window 5.2
Calculate total window thermal performance


Window 6.3 (USA)
Calculate total window thermal performance indices


Window Heat Gain Calculator
Calculates the solar heat gain through vertical windows in temperate


Window Overhang Analysis Tool
Visualize the degree to which a horizontal overhang shades a window


Window Overhang Design Tool
Visual feedback about the performance of a horizontal window overhang


Wire Size Calculator
Proper sizing of wires for solar panel-to-battery


ZIP Insulation Program (USA)
Determines most economic insulation level for your new or existing house