The tool library

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69 calculators

Calculator results

Crafts & Making

3D Printing Cost Calculator

Build a print cost from filament, energy, machine time, labour and fixed cost, then quote by markup or margin.

Use calculator Energy & Workshop Math

AC Size Calculator

Estimate room air-conditioner capacity from floor area and conditions.

Use calculator Landscape & Groundwork

Acreage Calculator

Convert plot dimensions or a known area into acres, hectares, square feet and metres.

Use calculator Energy & Workshop Math

Air Changes Per Hour Calculator

Compute ACH from room volume and airflow, in cubic metres per hour or CFM.

Use calculator Energy & Workshop Math

Amps to Watts Calculator

Convert load current in amps to real power in watts for DC, AC single-phase or balanced three-phase circuits.

Use calculator Landscape & Groundwork

Asphalt Calculator

Estimate asphalt tonnage from area, compacted thickness and supplier density.

Use calculator Energy & Workshop Math

BTU Calculator

Estimate room cooling BTU per hour from area and simple adjustments.

Use calculator Wood & Trim

Baseboard Calculator

Estimate baseboard lengths from room perimeter, door openings and stock length.

Use calculator Energy & Workshop Math

Battery Runtime Calculator

Estimate how long a battery will run a load, with explicit usable-energy and efficiency assumptions.

Use calculator Floors & Walls

Blown Insulation Calculator

Estimate loose-fill bag counts from the manufacturer's coverage row for your exact product and depth.

Use calculator Wood & Trim

Board Foot Calculator

Convert lumber dimensions into board feet and cost, per row and in total.

Use calculator Floors & Walls

Brick Calculator

Estimate bricks for a single wall face using the face-plus-joint module.

Use calculator Energy & Workshop Math

CFM Calculator

Convert cooling capacity to airflow, or size room airflow from volume and ACH.

Use calculator Crafts & Making

Candle Wax Calculator

Estimate batch mass and the wax and fragrance split for multiple containers.

Use calculator Floors & Walls

Cinder Block Calculator

Estimate concrete blocks for a wall face, using either a nominal module or actual size plus joint.

Use calculator Floors & Walls

Concrete Calculator

Find concrete volume for a slab, wall or cylindrical footing, with optional bag yield and cost.

Use calculator Floors & Walls

Countertop Square Footage Calculator

Add up countertop sections, subtract cutouts, and see gross and net square footage.

Use calculator Crafts & Making

Cross Stitch Calculator

Convert a stitch count and fabric count into the finished design and cut fabric size.

Use calculator Landscape & Groundwork

Crushed Stone Calculator

Find the cubic yards, tons and material cost for your crushed stone base.

Use calculator Landscape & Groundwork

Cubic Yard Calculator

Convert length, width and depth into cubic feet, cubic yards and cubic metres.

Use calculator Wood & Trim

Deck Board Calculator

Estimate the number of deck boards from deck size, board width, gap and stock length.

Use calculator Wood & Trim

Deck Calculator

Estimate deck boards and joist support-line counts from deck size and board layout.

Use calculator Landscape & Groundwork

Dirt Calculator

Find the cubic yards, tons and material cost for your soil or fill project.

Use calculator Floors & Walls

Drywall Calculator

Estimate whole drywall sheets from surface area and the sheet size you plan to use.

Use calculator Crafts & Making

Epoxy Resin Calculator

Split a resin pour into parts A and B in the ratio's declared basis.

Use calculator Crafts & Making

Fabric Calculator

Estimate fabric length for identical cut pieces from bolt width, pattern repeat and end trim.

Use calculator Wood & Trim

Fence Calculator

Count bays, posts, rails and vertical boards for one ungated run or closed loop.

Use calculator Wood & Trim

Fence Post Calculator

Lay out fence posts at even spacing along an open run or a closed perimeter.

Use calculator Water & Containers

Fish Tank Volume Calculator

Estimate aquarium capacity from internal dimensions, water depth and displacement.

Use calculator Floors & Walls

Flooring Calculator

Estimate flooring cartons from room area, waste and the manufacturer's coverage per carton.

Use calculator Water & Containers

Flow Rate Calculator

Convert a measured volume and time, or a pipe diameter and velocity, into flow rate.

Use calculator Landscape & Groundwork

Grass Seed Calculator

Convert a new-lawn or overseeding label rate into seed weight and whole packages.

Use calculator Landscape & Groundwork

Gravel Calculator

Find the cubic yards, tons and material cost for your gravel project.

Use calculator Floors & Walls

Grout Calculator

Estimate grout bags from tiled area using the manufacturer coverage or your measured consumption.

Use calculator Floors & Walls

Insulation Calculator

Estimate batt or roll insulation packs from area, openings, waste and the product's coverage.

Use calculator Energy & Workshop Math

LED Resistor Calculator

Calculate the series resistor for one LED string from supply and forward voltage.

Use calculator Wood & Trim

Lumber Calculator

Convert finished piece counts into stock lumber to buy.

Use calculator Floors & Walls

Mortar Calculator

Estimate mortar bags from a masonry unit count and a matching units-per-bag yield.

Use calculator Landscape & Groundwork

Mulch Calculator

Estimate mulch volume and whole bags from bed dimensions and your chosen depth.

Use calculator Floors & Walls

Paint Calculator

Estimate finish paint, whole containers and a separate primer quantity.

Use calculator Landscape & Groundwork

Paver Calculator

Estimate pavers, whole boxes and separate base and bedding volumes.

Use calculator Landscape & Groundwork

Pea Gravel Calculator

Find the cubic yards, tons and material cost for your pea gravel path.

Use calculator Water & Containers

Pipe Volume Calculator

Estimate the internal water volume of a pipe from internal diameter and length.

Use calculator Water & Containers

Pool Salt Calculator

Compare salt mass for a user-specified increase in concentration.

Use calculator Water & Containers

Pool Shock Calculator

Compare dry cal-hypo product mass for a concentration change you supply.

Use calculator Water & Containers

Pool Volume Calculator

Estimate pool capacity from shape and depth, with a linear shallow-to-deep option.

Use calculator Crafts & Making

Quilt Binding Calculator

Estimate binding length, strip count and fabric yardage, including joins.

Use calculator Crafts & Making

Quilt Calculator

Estimate block counts and block fabric from a quilt grid and cut patch size.

Use calculator Wood & Trim

Rafter Length Calculator

Estimate common-rafter slope length from span, ridge, overhang and pitch.

Use calculator Landscape & Groundwork

Rebar Calculator

Count reinforcing bars on a rectangular grid and estimate total length and straight stock.

Use calculator Landscape & Groundwork

Retaining Wall Calculator

Estimate regular blocks and caps for a straight block retaining wall.

Use calculator Landscape & Groundwork

River Rock Calculator

Find the cubic yards, tons and material cost for your river rock bed.

Use calculator Wood & Trim

Roof Pitch Calculator

Convert between rise/run, X:12 pitch, roof angle in degrees and percent grade.

Use calculator Landscape & Groundwork

Sand Calculator

Find the cubic yards, tons and material cost for your sand project.

Use calculator Floors & Walls

Self-Leveling Concrete Calculator

Estimate self-leveling compound bags from area, average depth and product yield.

Use calculator Wood & Trim

Shingle Calculator

Estimate shingle bundles from sloped roof area or projected roof planes and pitch.

Use calculator Floors & Walls

Siding Calculator

Estimate siding cartons from wall area, openings, waste and effective coverage.

Use calculator Landscape & Groundwork

Sod Calculator

Estimate lawn area and the rolls or pallets of sod to order.

Use calculator Landscape & Groundwork

Square Footage Calculator

Measure rectangle, triangle and circle areas, or combine rectangular and triangular sections.

Use calculator Wood & Trim

Stair Calculator

Compare a straight-flight riser count, actual rise and horizontal run.

Use calculator Landscape & Groundwork

Stone Calculator

Find the cubic yards, tons and material cost for your landscape stone project.

Use calculator Floors & Walls

Thinset Calculator

Estimate thinset mortar bags from area and the product's coverage for your trowel.

Use calculator Floors & Walls

Tile Calculator

Estimate tiles and boxes for a room from area, tile size and waste allowance.

Use calculator Landscape & Groundwork

Topsoil Calculator

Find the cubic yards, tons and material cost for your topsoil bed.

Use calculator Energy & Workshop Math

Voltage Drop Calculator

Estimate conductor voltage drop from length, current, supplied resistance and power factor.

Use calculator Wood & Trim

Wainscoting Calculator

Lay out equal wainscoting panel openings across a wall, with stile positions.

Use calculator Floors & Walls

Wallpaper Calculator

Estimate wallpaper strips and rolls using real roll geometry — not just wall area.

Use calculator Energy & Workshop Math

Watts to Amps Calculator

Convert real power in watts to load current for DC, AC single-phase or balanced three-phase circuits.

Use calculator Energy & Workshop Math

Wire Size Calculator – Voltage-Drop Comparison

Compare listed reference gauges against a chosen voltage-drop limit.

Use calculator