Free tools
Tools for the industry.
23 free calculators for engineers, technicians, installers, AV specialists and customers -- the numbers you check on every job, from cameras and storage to power, cabling, networks and AV.
Audio & display
Speaker lines, screens and projectors.
100 V Line Speaker Load Calculator
Add up speaker tap wattages on a 100 V or 70 V line and check the amplifier has enough headroom.
Open calculatorProjector Throw & Screen Size Calculator
Work out the image size a projector gives at a distance from its throw ratio, or the distance for a screen width.
Open calculatorScreen Size & Viewing Distance Calculator
Find the right TV or display size for a viewing distance, or the best seats for a screen you have.
Open calculatorProjector Brightness Calculator
Work out the lumens a projector needs for the screen size, the room light and what the audience is watching.
Open calculator