Engineering & Technical
Engineering & Build Calculators
6 free tools for unit conversion, area, lighting, paint and electricity calculations.
Length Converter
Convert mm, cm, m, km, inches, feet, yards and miles
Calculate →Weight Converter
Convert mg, g, kg, tonnes, ounces, pounds and stone
Calculate →Home & Room Area Calculator
Add rooms one by one and get total home area. Works for flooring, painting and renovation planning.
Calculate →Lighting Requirements Calculator
Required lumens and LED bulb options based on room type and area
Calculate →Paint Calculator
Estimate paint quantity and cost based on room and wall dimensions
Calculate →Electricity Bill Calculator
Monthly electricity cost by device power consumption and usage time
Calculate →Size to Weight Calculator
Calculate weight from box dimensions and material density
Calculate →Password Combination Calculator
Calculate possible password combinations from your policy parameters
Calculate →TV Size Calculator
Screen dimensions and optimal viewing distance from TV size and resolution
Calculate →TV Mounting Height Calculator
Ideal TV wall-mount height from eye level and viewing angle
Calculate →