About Us
A Simple Tool for Solar Users
Our Story
Who We Are
Solar Unit Calculator is a free tool that helps you track your solar meter readings and calculate how many units you have used in a billing period.
Whether you are setting up a new solar system or just keeping an eye on an existing one, the calculator gives you a clear number without any guesswork.
1,250+
Happy Users
4.8★
User Rating
100%
Free to Use
Our Advantages
Why Choose Us?
Fast and Reliable
Enter your readings and get the result straight away. No complicated steps.
Easy to Use
No technical knowledge needed. The form is straightforward and works on any device.
Save, Download and Email
Keep a copy of your calculation as a PDF or send it to your email directly from the tool.
Free and Private
No charges, no ads tracking your data. Your calculations are only visible to you.
FAQ
Frequently Asked Questions
Learn more about Solar Unit Calculator
Solar Unit Calculator is a free online tool for calculating solar energy usage from your meter readings. You enter the import, export, and generation values from two billing periods and it gives you the net units used.
The tool was built by Prolbox Technology. The goal was to give solar users a quick way to check their usage without doing the math manually.
It is free, straightforward, and does not require any sign-up to use. You can also create an account to save your calculations and download them as PDFs whenever you need them.