Plan the work
before the work.
Measure materials with formulas you can follow. FigureNest’s construction tools turn a tape measure and a few supplier details into a useful first estimate.
Know what to buy
before you buy it.
These estimates focus on the decisions that commonly cause waste: thickness, coverage, cuts, slope, spacing, and supplier units. Enter your measurements, keep an allowance that matches the job, and compare the result with the product label or local quote.
Find the job you are planning.
BTU Calculator
Estimate a room’s planning cooling or heating load from area and an entered climate factor.
Open calculatorCable & Fuse Size Calculator
Estimate cable size, protective-device rating, design current, and voltage drop for common low-voltage circuits.
Open calculatorVoltage Drop Calculator
Estimate conductor voltage loss using current, one-way length, resistance, and circuit type.
Open calculatorElectricity Calculator
Estimate appliance energy use and variable electricity cost from power and operating time.
Open calculatorOhm’s Law Calculator
Solve voltage, current, resistance, or electrical power from two known values.
Open calculatorResistor Calculator
Calculate equivalent resistance for series or parallel resistor networks.
Open calculatorConcrete Calculator
Estimate ready-mix concrete volume for rectangular slabs, pads, paths, and small pours.
Open calculatorConcrete Bag Calculator
Find how many bags of premixed concrete you need from the pour dimensions and bag yield.
Open calculatorConcrete Footing Calculator
Estimate concrete for continuous strip footings or repeated rectangular footings.
Open calculatorConcrete Cost Calculator
Estimate the material cost of a concrete pour from dimensions, price, and waste.
Open calculatorCubic Yard Calculator
Convert rectangular project dimensions into cubic yards for concrete, soil, gravel, mulch, or fill.
Open calculatorSquare Footage Calculator
Find floor, wall, patio, or garden area from length, width, and number of equal spaces.
Open calculatorBrowse the complete construction tool index
Use the result to make a plan, not to skip the plan.
Material quantities vary with grade, product coverage, soil, code, access, and the shape of the job. Every calculator shows its method so you can see what is included and what still needs a supplier or professional check.
Read the construction materials estimating guide