Degree days, made easy.

Web applications for
degree day calculations. online normalization. regression analyses.

Save time. Save energy. Save money. We don’t just provide Degree Days and leave you alone with them. Upload your energy usage data and get them easily weather-corrected in our “Energy Normalizer” app. No formulas needed, no copy & pasting data!

Selected Customers & Partners

Features

Web Applications

Our platform is designed to make your life easier. You can access all of our energy analysis tools, save your projects, and keep track of your progress.

Degree Day Calculator

Get Heating & Cooling Degree Days for over 23,000 worldwide locations!

Energy Normalizer

Weather normalization was never so easy! Just upload your energy usage data, and this tool will weather-correct it!

Energy Data Formatter

The Energy Data Formatter is a web application that helps you quickly format and organize your energy usage data. Just upload your raw energy usage data, get a quick analyzes and be ready for further analysis!

Regression Tool (available soon)

We will make regression analyses so easy to use! Simply upload your energy data and test it against multiple base temperatures.

 What our users say about us

{As a result of taking the variability of the winters out of the equation, I can better understand the effects of energy efficiency improvements. Especially the long-term average is a very helpful indicator for my work.
5
Erika Bravo
HVAC & Energy Management Business
{The Degree Day Calculator PRO is the easiest and most reliable way to calculate Heating and Cooling Degree Days I found this far. No more copy/pasting Excel data, no complicated formulas - just a single click for your specific location. For me, it's safe to say that it is indeed one of the best tools available.
5
Sven Lewin
{The Energy Data Degree Day Subscription is a fantastic time saver! I love the quick access via the web calculator and get the results directly as a graph. I have been using it for a few months now and will continue to use it in my daily work. I recommend this to anyone who needs degree day information.
5
Nicole Finnagen
Asset Manager
{Finally, I found a fast, easy and accurate tool for adjusting the heating consumptions of our clients!
5
Devan Hill
Energy and Sustainability Manager
{The Degree Day API is an extremely valuable resource for everybody working in the energy industry.
5
Paul Nash
Paul Nash
Energy Consultant
{The Degree Day Calculator PRO is the easiest and most reliable way to calculate Heating and Cooling Degree Days I found this far. No more copy/pasting Excel data, no complicated formulas - just a single click for your specific location. For me, it's safe to say that it is indeed one of the best tools available.
5
Sven Lewin
{As a result of taking the variability of the winters out of the equation, I can better understand the effects of energy efficiency improvements. Especially the long-term average is a very helpful indicator for my work.
5
Erika Bravo
HVAC & Energy Management Business
{The Energy Data Degree Day Subscription is a fantastic time saver! I love the quick access via the web calculator and get the results directly as a graph. I have been using it for a few months now and will continue to use it in my daily work. I recommend this to anyone who needs degree day information.
5
Nicole Finnagen
Asset Manager
{Finally, I found a fast, easy and accurate tool for adjusting the heating consumptions of our clients!
5
Devan Hill
Energy and Sustainability Manager
{The Degree Day API is an extremely valuable resource for everybody working in the energy industry.
5
Paul Nash
Paul Nash
Energy Consultant

Features

API Access

Are you looking for a way to integrate Heating and Cooling Degree Days directly into your existing software or database?

We have the solution for you! The Degree Day API is a simple, highly configurable way to access our database automatically. It allows you to fetch Heating & Cooling Degree Days and integrate them directly into your existing systems.

Energy Management Software

Our API can be used to connect directly to your energy management software. If you’re unsure whether software can be connected to our API, request a testing license and connect us to your developer or software provider.

Database

Do you want to build a local database of Degree Days and fetch the latest data at regular intervals?
No problem! Choose your API plan and get the data when you need it in JSON or CSV format.

MS Excel

It takes just a minute to connect your database to Excel. Once you’ve done it, your data sheets will always have the latest available data.

Other Systems

Our universal API allows all different kinds of operating systems and software to connect to our database. We have a dedicated technical team that will help you get up and running in no time!

What are Degree Days?

This video explains heating and cooling degree days and why they are so crucial in Energy Management.

What do you need Heating or Cooling Degree Days for?
Degree Days reflect a location’s temperature conditions that influence a building’s heating and cooling demand. Heating and Cooling Degree Days are used widely in Energy Management for analyzing historical energy usage, evaluating optimization measurements, or designing and dimensioning HVAC components.
Growing Degree Days are another use case in agriculture that is not covered by Energy Data GmbH.
How do you calculate degree days?
Degree Days are the product of a day and the difference between a base temperature and the outside air temperature.
The base temperature (also called the balance point) is a threshold value of the outside air temperature below which heating or cooling is required to maintain the desired room temperature.
The unit is Kelvin days (K • d). Degree Days are only determining days on which the outside air temperature drops below (for Heating Degree Days) or exceeds (for Cooling Degree Days) the balance point. Otherwise, the day counts as zero Degree Days.
Who needs Degree-Days-as-a-Service

Our service is for anybody who needs help understanding their energy data. Our customers include energy managers, auditors, consultants, and universities.

Whether you’re looking for a way to reduce your carbon footprint, improve your efficiency, or increase your bottom line, we can help. We know that every organization has different needs, so we tailor our services to suit you and your business.

Can I test your service before subscribing to a paid plan?

You can absolutely test our service before subscribing to a paid plan. We have a free membership that gives you access to all of our tools but with limited historical data (only current and the last year).

You can also start with a 7-day trial for full access to our web applications. We will not charge you anything during the trial period, but we will ask you for your payment details to prevent spam.

If you want to test the API, just book one of our API subscriptions and test the full range of features. If you find that the service does not meet your expectations within 30 days, you can cancel the subscription without giving any reason and get the full purchase price back.

How can I integrate the data in my existing software?
We provide an Application Programming Interface (API) so that software applications can easily access Energy Data’s services. Many energy-management software systems use our API to manage their data.
You can find out more about the API on our technical documentation page and contact our support team with any questions you have.
Can I trust the data from Energy Data?
Yes, of course! Energy Data GmbH’s database includes decades of records from over 23,000 weather stations worldwide. We obtained the weather observations from the Meteorological Assimilation Data Ingest System (MADIS) and the Integrated Surface Database (ISD). Quality checks by different algorithms of the systems are performed to check for, e.g. extreme values and limits, consistency between parameters, and continuity between observations.

Our PRO Plans

Web App Access
API Access
The web access to our energy tools help you quickly normalize your energy data before analysis. You no longer have to take time to clean up your usage reports. We do it for you!

Member

Get Limited Access for Free

Free

Tools included:

  • Degree Days Calculator PRO

    Access at least 10 years of historical access with your PRO plan.

  • Energy Normalizer

    Upload your energy data and apply different degree day concepts. The easiest way of weather normalization.

  • QRegression Tool (soon available)

    Upload your energy data and determine the right base temperature and your base load.

  • Data Formatter

    Quickly analyze and format your energy data for further use in our tools.

Features included:

  • RResponsive result visualization
  • RSave your projects
  • RUse save datasets in all tools
  • QDownload results as CSV file
Data included:
  • RHeating Degree Days (HDD)
  • R"Room Heating Degree Days" (DD)
  • RCooling Degree Days (CDD)
  • Rover 23,000 locations
  • Rhistorical data: last and current year
  • No credit card needed!
    Test our service risk-free for 30 days. If you are not satisfied, we will refund 100% of your payment.

PRO User

Full Access to all Web Tools

99 € 57 € /mth.

Tools included:

  • Degree Days Calculator PRO

    Access at least 10 years of historical access with your PRO plan.

  • Energy Normalizer

    Upload your energy data and apply different degree day concepts. The easiest way of weather normalization.

  • Regression Tool (soon available)

    Upload your energy data and determine the right base temperature and your base load.

  • Data Formatter

    Quickly analyze and format your energy data for further use in our tools.

Features included:

  • RResponsive result visualization
  • RSave your projects
  • RUse save datasets in all tools
  • RDownload results as CSV file
Data included:
  • RHeating Degree Days (HDD)
  • R"Room Heating Degree Days" (DD)
  • RCooling Degree Days (CDD)
  • Rover 23,000 locations
  • Rhistorical data: min. 10 years

learn more

  • R30 days money back guarentee
    Test our service risk-free for 30 days. If you are not satisfied, we will refund 100% of your payment.

*All prices on this page are shown without VAT. Depending on your country, VAT may be added during checkout.

API access for energy professionals who want to integrate Degree Days into their existing software or database.

save more than 10% on annual plans

Lite

The Starter Package

39 € /mth.

Data Limits:

  • 10 Locations
  • 100 Requests/ h

Tools included:

  • Degree Days Calculator PRO

    Access at least 10 years of historical access with your PRO plan.

  • Energy Normalizer

    Upload your energy data and apply different degree day concepts. The easiest way of weather normalization.

  • Regression Tool (soon available)

    Upload your energy data and determine the right base temperature and your base load.

  • Data Formatter

    Quickly analyze and format your energy data for further use in our tools.

Features included:

  • RAPI Access (json and vsc)
  • RResponsive result visualization
  • RSave your projects
  • RUse save datasets in all tools
  • RDownload results as CSV file
Data included:
  • RHeating Degree Days (HDD)
  • R"Room Heating Degree Days" (DD)
  • RCooling Degree Days (CDD)
  • Rup to 10 locations
  • Rmin. 10 years of historical data
  • Rup to 100 requests per hour

learn more

  • R30 days money back guarentee
    Test our service risk-free for 30 days. If you are not satisfied, we will refund 100% of your payment.

Professional

For high Data Demands

89 € /mth.

 

Data Limits:

  • 25 Locations
  • 1,000 Requests/ h

Tools included:

  • Degree Days Calculator PRO

    Access at least 10 years of historical access with your PRO plan.

  • Energy Normalizer

    Upload your energy data and apply different degree day concepts. The easiest way of weather normalization.

  • Regression Tool (soon available)

    Upload your energy data and determine the right base temperature and your base load.

  • Data Formatter

    Quickly analyze and format your energy data for further use in our tools.

Features included:

  • RAPI Access (json and vsc)
  • RResponsive result visualization
  • RSave your projects
  • RUse save datasets in all tools
  • RDownload results as CSV file
Data included:
  • RHeating Degree Days (HDD)
  • R"Room Heating Degree Days" (DD)
  • RCooling Degree Days (CDD)
  • Rup to 25 locations
  • Rmin. 10 years of historical data
  • Rup to 1,000 requests per hour

learn more

  • R30 days money back guarentee
    Test our service risk-free for 30 days. If you are not satisfied, we will refund 100% of your payment.

Enterprise

All Features & Locations

159 € /mth.

 

Data Limits:

  • Unlimited Locations
  • 4,000 Requests/ h

Tools included:

  • Degree Days Calculator PRO

    Access at least 10 years of historical access with your PRO plan.

  • Energy Normalizer

    Upload your energy data and apply different degree day concepts. The easiest way of weather normalization.

  • Regression Tool (soon available)

    Upload your energy data and determine the right base temperature and your base load.

  • Data Formatter

    Quickly analyze and format your energy data for further use in our tools.

Features included:

  • RAPI Access (json and vsc)
  • RResponsive result visualization
  • RSave your projects
  • RUse save datasets in all tools
  • RDownload results as CSV file
Data included:
  • RHeating Degree Days (HDD)
  • R"Room Heating Degree Days" (DD)
  • RCooling Degree Days (CDD)
  • Rup to 25 locations
  • Rmin. 10 years of historical data
  • Rup to 1,000 requests per hour

learn more

  • R30 days money back guarentee
    Test our service risk-free for 30 days. If you are not satisfied, we will refund 100% of your payment.

*All prices on this page are shown without VAT. Depending on your country, VAT may be added during checkout.

Do you need a higher hourly rate limit (request units per hour)?