Area calculator
Measure a rectangular room, surface or panel. Include material allowance and a price if useful.
Open calculatorCalculate with clarity · UCP v0.2
Everyday calculations, made clear.
Fast, free tools with interactive diagrams. Start simply, then explore formulas and advanced settings when you need them.
Working calculators
Three useful tools in this first, experimental version. More will follow based on real usage.
Slope calculator
Turn rise and horizontal run into slope percentage, degrees and true inclined length.
Open calculatorPercentage calculator
Calculate a percentage of any number, including the amount after adding or subtracting it.
Open calculatorMade for three ways of working
One mathematical core, multiple levels of depth.
01 · Everyday users
Enter values and get answers immediately, with a visual explanation.
02 · Professionals
Reveal parameters, units, formulas and assumptions when more detail matters.
03 · AI and software
Browse structured formula descriptions. Executable API/MCP integration is planned, not live.