THE PASTEZAP TOOLKIT
Construction & Trade Calculators
Quantities for concrete, paint, tiles, roofs and steel, plus electrical, logistics, farming, photography and CCTV storage calculators.
Choose from 50 focused tools. Each page shows supported formats, practical examples and input limits before you begin. No account is required.
50 tools
Concrete Calculator
Estimate wet concrete volume, cement, sand, aggregate and bags for a slab, wall, column, footing or stair waist.
Paint Calculator
Estimate wall and ceiling area, litres of paint and the number of cans from coats, coverage and waste.
Tile Calculator
Count tiles for a floor or wall from the tile size, the joint and a waste allowance, then round up the boxes.
Video Storage Calculator
Estimate CCTV and NVR disk space from cameras, resolution, frame rate and codec, or from a camera bitrate.
Ohmโs Law Calculator
Find voltage, current, resistance and power from any two electrical values.
Electricity Cost Calculator
Estimate kilowatt-hours and energy cost from watts, hours per day, days and a price per kWh.
CBM Calculator
Convert carton dimensions into cubic metres and multiply by the carton count.
Solar Output Calculator
Estimate daily, monthly and yearly energy from panel watts, panel count, peak sun hours and a loss percent.
Battery Runtime Calculator
Estimate usable watt-hours and runtime from amp-hours, voltage, depth of discharge, efficiency and load.
Flooring Calculator
Turn a room into the floor area with waste and the number of packs to buy.
Drywall Calculator
Estimate plasterboard sheets, screws and joint compound for the walls of a room, with an optional ceiling.
Roof Pitch and Area Calculator
Convert roof pitch to degrees and percent, then estimate rafter length, roof area and tile count.
Rebar Calculator
Count reinforcing bars from spacing and cover, then estimate length, lap and steel mass.
Steel Weight Calculator
Estimate the mass of a plate, round bar, pipe, angle or square bar from its size and density.
Excavation Calculator
Estimate bank and loose excavation volume for a rectangular or trapezoidal trench, and the number of truck loads.
Stair Calculator
Find riser count, actual riser height, going, slope, stringer length and the 2R+G comfort check.
Brick and Block Calculator
Estimate masonry units and mortar from the wall size, openings, unit size and joint.
Slope and Grade Calculator
Convert rise and run into grade percent, angle and a 1-to-n ratio.
Section Properties Calculator
Calculate area, centroid, second moment of area and section modulus for a rectangle, circle, pipe or I-section.
Simply Supported Beam Calculator
Find support reactions and the maximum moment for a simple beam with a centre load, an offset load or a uniform load.
Voltage Drop Calculator
Estimate resistive voltage drop, or the conductor section for a drop limit, in single-phase and three-phase circuits.
Electrical Current Calculator
Estimate single-phase or three-phase current from kilowatts, voltage and power factor.
Volumetric Weight Calculator
Compare actual weight with volumetric weight using divisor 5000, 6000, 139 or your own divisor.
Container Load Calculator
Estimate how many identical cartons fit in a 20-foot, 40-foot or high-cube container, or in sizes you enter.
Pallet Fit Calculator
Estimate cartons per layer and per stack on a EUR, industrial or 48ร40 inch pallet.
Seed Rate Calculator
Convert a kilogram-per-hectare seed rate into seed mass and bags for a field.
Fertilizer Calculator
Find how much product a field needs from the bag analysis and the nutrient targets.
Irrigation Volume Calculator
Estimate irrigation water from a field area, a water depth and an application efficiency.
Spray Mix Calculator
Scale a label rate and a spray volume to a field, and split the product across tank loads.
Depth of Field Calculator
Calculate hyperfocal, near and far distances from focal length, aperture, distance and circle of confusion.
Hyperfocal Distance Calculator
Calculate the hyperfocal distance and the near limit at that focus.
Crop Factor Calculator
Convert a focal length and an aperture to full-frame equivalents with a crop factor.
ND Filter Calculator
Convert an ND factor, stop count or ND number into a new shutter time and optical density.
Recording Time Calculator
Estimate how long a video bitrate fills a decimal gigabyte of storage.
3D Filament Calculator
Convert filament volume or length into mass, cost and how many prints fit on a spool.
Bend Allowance Calculator
Calculate bend allowance, bend deduction and flat length from the angle, radius, thickness and K factor.
Board Foot Calculator
Convert board thickness, width and length into board feet and cubic metres.
Tap Drill Calculator
Estimate a tap drill from the major diameter, pitch and a thread percentage.
Wallpaper Calculator
Estimate wallpaper drops and rolls from the room perimeter, roll size and pattern repeat.
Bulk Material Calculator
Convert an area and a depth into volume and mass for gravel, sand, topsoil, mulch or a density you enter.
Asphalt Calculator
Estimate compacted asphalt volume and tonnes from the paved area, thickness and density.
Fence Calculator
Count fence posts, bays and rails from the run and the post spacing, plus concrete for round post holes.
Deck Board Calculator
Estimate deck boards and joists from the deck size, board width, gap, stock length and joist spacing.
Plywood Calculator
Estimate how many identical sheets cover a number of rectangular pieces, with waste.
Pipe Volume Calculator
Calculate the water in a pipe from its internal diameter and length, and the minutes to fill it at a flow you enter.
Weld Metal Calculator
Estimate the volume and mass of an equal-leg fillet weld from the leg size, length, density and extra metal.
Stud Wall Calculator
Count studs, plate length and noggins from the wall length and the stud spacing.
Drill Speed Calculator
Convert a cutting speed and a drill diameter into spindle speed in revolutions per minute.
Gutter Calculator
Estimate gutter length, hangers and downspouts from the eaves length and the two spacings.
Plaster Calculator
Estimate plaster or render area, volume, mass and bags from the room, the coat thickness and the bag weight.