Section II · 107 tools
Calculators.
Mortgages, loans, interest, taxes, retirement, health, math, and the rest. Every tool computes in arbitrary precision and links its formula in plain language.
107 calculators in construction
Price Per Linear Foot Calculator
Calculate cost per linear foot for any material. Enter total price and length, add waste allowance and state sales tax for a complete project estimate.
Picture Frame Molding Calculator
Calculate the exact length of frame molding needed for any picture size. Enter artwork dimensions, mat border, molding face width, and waste allowance for an accurate purchase estimate.
Well Volume Calculator
Compute well casing water volume in gallons from inside diameter and water column depth, with EPA 3x purge volume option for groundwater sampling.
Tent Size Calculator
Calculate required tent size in square feet based on guest count, seating style, dance floor, bar stations, buffet tables, and stage setup.
Energy Use Intensity (Eui) Calculator
Calculate building Energy Use Intensity (EUI) in kBtu/ft²/yr. Enter annual electricity, gas, fuel oil, and steam usage plus floor area for instant site or source EUI results.
Recessed Lighting Calculator
Calculate the exact number of recessed lights needed for any room by entering dimensions, ceiling height, room type, and fixture lumens.
Lighting Calculator (Lumen Method)
Calculate the exact number of light fixtures for any room using the IES Lumen Method — enter room size, type, and bulb lumens for instant results.
Bathroom Mirror Size Calculator
Calculate the ideal bathroom mirror width for your vanity using style-based proportions. Enter vanity width and style for an instant size recommendation.
Half Square Triangle (Hst) Calculator
Instantly calculate starting square cut sizes and quantities for half square triangle (HST) quilt blocks using 2-, 4-, or 8-at-a-time construction methods.
Bag Calculator (Concrete, Mulch, Soil, Sand & Gravel)
Calculate how many bags of concrete, mulch, topsoil, sand, or gravel are needed for any project. Enter length, width, and depth for an instant bag count.
Curtain Size Calculator
Calculate the exact curtain fabric width needed for any window using window width, rod extension per side, and fullness ratio.
Pipe Weight Calculator
Calculate steel, PVC, or copper pipe weight by entering outside diameter, wall thickness, length, and material density.