UD5 Toolkit
Household Energy Usage Estimator – Online Appliance kWh Breakdown
Add appliances with typical wattage and hours/day to get weekly kWh and cost. Identify energy hogs.
Tag: Energy Unit Converter - Joule to Calorie
3+ toolsSpring Constant & Elastic Energy Calculator – Online Hooke's Law
Enter spring constant and displacement to find force and stored energy. Visual compression.
Energy Converter - Online Joule Calorie BTU & kWh Tool
Convert energy units: Joule, calorie, BTU, kilowatt-hour, electronvolt. Useful for science and household energy calculations. Fully local.