Tools

Calculate your devices' electricity consumption and costs - quick, easy and fully customizable.

Calculate your estimated monthly mortgage payment - including interest, loan term, and optional taxes or insurance.

Calculate how much paint you need for your next painting project - including doors/windows and suggested bucket sizes.

Calculate the recommended heating power for any room - based on size, usage, and insulation quality.

Estimate how much rainwater you can collect from your roof - simple, free and sustainable.

Never sow too much or too little again - with our handy seed calculator.

Estimate how much electricity you could generate with a solar panel system - based on area, roof orientation, and your location.