Hour Calculator
Calculate working days, hours, and time percentages for any month. Perfect for freelancers, contractors, and HR professionals.
Open ToolDew Point Calculator
Calculate dew point temperature based on ambient temperature and relative humidity. Works offline with unit conversion support.
Open ToolCable Length Calculator
Calculate maximum cable length based on electrical parameters such as voltage, current, and acceptable voltage drop.
Open ToolCable Length vs. Signal Quality
Calculate maximum cable length based on protocol, baud rate, cable type, and EMI environment for optimal signal quality.
Open ToolDIP Switch Calculator
Convert between DIP switch positions and decimal/binary/hexadecimal values. Essential for hardware configuration and embedded systems.
Open ToolCalculator
Perform basic and advanced mathematical operations with this versatile calculator. Supports keyboard input and works offline.
Open ToolPower Supply Sizing Calculator
Calculates the total current draw and suggests a suitable power supply for your electrical or electronics project.
Open ToolDevice ID Hash Tool
Generate consistent unique identifiers from device serial numbers or MAC addresses for MQTT topics, asset tracking, and more.
Open ToolBTU Calculator
Calculate heating and cooling BTU requirements for any room size. Perfect for HVAC system sizing.
Open ToolUPS Runtime Calculator
Calculate how long your UPS will last based on load power, battery specs, and efficiency. Essential for backup power planning.
Open ToolLux Level Calculator
Calculate lighting requirements for any room based on room type and area. Determine required lumens and number of light fixtures needed.
Open ToolPV System Calculator
Design photovoltaic arrays by calculating module string configuration based on inverter and PV module specifications.
Open ToolComing Soon
More tools are on the way! Have an idea for a tool? Send us your suggestions.
Suggest a Tool Coming SoonAbout These Tools
These tools are designed to help with common calculations and tasks that professionals and hobbyists encounter regularly. All tools are free to use and work entirely in your browser - no data is sent to any server for processing.
Privacy Focused
All calculations happen in your browser. No data is sent to any servers.
Works Offline
Many of our tools can work offline after the first load.
Regular Updates
We continuously improve our tools based on user feedback.