Build energy tools that drive savings.
No coding required.
Create solar panel sizing calculators, energy savings estimators and utility cost comparison tools that help customers make informed decisions. Build professional energy calculators with more than 400 functions.
Start your 30-day free trial
Go from spreadsheet to savings tool in minutes.
Reduce development costs by more than 70%.
Build energy calculators in 4 easy steps:
Start with your energy calculations.
No tech skills needed. If you understand energy systems and cost savings, you can build professional tools.
Drag and drop blocks.
Build solar sizing calculators, ROI estimators and consumption analyzers using drag-and-drop simplicity.
Preview your app.
Test your calculator with real energy data and publish instantly. Works in the field, office and customer meetings.
Share your app.
Share with customers or embed on your website for lead generation and energy consultations.
No account required
Convert prospects into confident energy customers.
Attract serious energy prospects with professional tools. Embed solar calculators and savings estimators on your website to demonstrate value and build trust.
Help customers understand their energy savings.
Close more deals with transparent energy calculations. Use professional tools for solar sizing, payback analysis, consumption tracking and cost comparisons that help customers make informed decisions.
Control access to your energy tools.
Calculators are private by default, visible only to you. Share with specific team members or make public for customer use. Perfect for site visits and energy consultations.
Integrate with your existing energy systems.
Connect calculators with your CRM and energy management systems through Zapier. Automatically capture lead data and integrate with solar and utility workflows for streamlined operations.
"Calcapp provides amazing support—no other product compares"
Calcapp is simple enough for anyone to use and they provide amazing support—no other product compares. We quickly managed to bring our ROI marketing campaign to life with Calcapp. Using an outside developer would have cost $6,000.
Calcapp is very powerful and has been solid and reliable the whole time we've used it. We have been able to create everything we have wanted to. Finally, a great way to make web calculators!
Start building your first energy tool in minutes.
Whether you're just starting out or have an established company, we have you covered.
Starter
Perfect for individual engineers and small firms.
Business
Best value for growing energy companies.
White Label
Full-featured plan for large energy organizations.
FAQ
Email us or use the chat widget if you have any other questions.
Yes. When you create an account, a 30-day free trial period is started. You have unlimited access to Calcapp during this period. To ensure that your shared apps continue working after the trial period, be sure to sign up for a paid plan before the trial's end date.
Yes. Our Free plan allows unlimited access to Calcapp Creator, our app designer, and Calcapp Connect, which allows app creators to run their own apps. As such, personal apps can be run on the Free plan. However, in order for others to run your apps, you need a paid plan.
If you go over the plan limits and you're on a paid plan, your app will continue working normally. We will, however, reach out and ask you to upgrade to a more capable plan. Apps on the Free plan stop working when you hit the plan limits and only resume working once a new month rolls around.
A public app is accessible to anyone with a link to it — use a private apps instead if the app contains sensitive information. With public apps, you pay per app.
Private apps require your users to sign in before gaining access to your app. They all share the same private plan. With private apps, you pay per user and can use an unlimited number of apps.
Embedded apps are meant to be part of your website and cannot run as standalone apps. They all share the same embedded plan. The number of apps that can be put on the same plan varies depending on what plan you choose. Private and public apps can also be embedded, but the embedded plan is more cost-effective for sites with many apps.
We offer a 50% discount on all Calcapp plans to mission-driven organizations that operate with limited budgets and rely primarily on donations, grants, or similar funding. Large institutions with substantial budgets—such as universities, hospitals, and government-funded research organizations—are generally not eligible, even if they are legally non-profit. Please contact us to apply for the discount.
Create your first energy calculator.
Without any tech skills.
No email or credit card required