Technology
Understand the tools and systems you use.
Calculators
Aspect Ratio Calculator
Express an image or display’s width-to-height ratio as a decimal.
Download Time Calculator
Estimate file download time from decimal megabytes and megabits per second.
Uncompressed Image Size Calculator
Estimate uncompressed pixel data size from dimensions and color depth.
Pixel Density Calculator
Find display pixel density from resolution and physical diagonal.
Guides & answers
Understanding Appliance Power and Energy
Power describes how quickly a device uses energy. Energy accumulates as a device operates. A watt rating alone does not give total daily use.
How do you estimate appliance energy use?
Multiply power in kilowatts by actual operating hours to estimate kilowatt-hours.
