CCalcWright
Free reference library

Construction Infographics & Reference Charts

Accurate, embeddable trade references — use any of these on your own site, blog, or estimate. The only ask: keep the link back to CalcWright in the embed code.

Roof Pitch Multiplier Chart — pitch to angle and slope factor
Roofing reference

Roof Pitch Multiplier Chart

Convert any roof pitch to its angle and the slope factor that turns footprint into true roof area.

Use the calculator →
Embed this on your site (free)

Copy & paste this code. It links back to CalcWright — that's all we ask.

Mulch and Topsoil Coverage Guide — area one cubic yard covers by depth
Landscaping reference

Mulch & Topsoil Coverage Guide

How much ground one cubic yard covers at common depths — plus bag counts.

Use the calculator →
Embed this on your site (free)

Copy & paste this code. It links back to CalcWright — that's all we ask.

Copper Wire Gauge Ampacity Chart by AWG — NEC 310.16
Electrical reference

Copper Wire Ampacity Chart

Allowable ampacity of copper conductors by AWG, per NEC Table 310.16.

Use the calculator →
Embed this on your site (free)

Copy & paste this code. It links back to CalcWright — that's all we ask.

Residential Stair Code Dimensions diagram — riser, tread, headroom
Framing reference

Residential Stair Code Dimensions

The key rise, run, and clearance limits for code-compliant stairs (IRC typical).

Use the calculator →
Embed this on your site (free)

Copy & paste this code. It links back to CalcWright — that's all we ask.

Concrete Bag Yield Chart — bags of mix per cubic yard
Concrete reference

Concrete Bag Yield Chart

How many bags of concrete mix make a cubic yard — by bag size.

Use the calculator →
Embed this on your site (free)

Copy & paste this code. It links back to CalcWright — that's all we ask.

Gravel and Sand Coverage Chart — area per cubic yard and weight
Landscaping reference

Gravel & Sand Coverage Chart

Area one cubic yard covers by depth, plus approximate weight.

Use the calculator →
Embed this on your site (free)

Copy & paste this code. It links back to CalcWright — that's all we ask.

Paint Coverage Guide — square feet per gallon by product
Painting reference

Paint Coverage Guide

How far a gallon goes — and how much paint to buy.

Use the calculator →
Embed this on your site (free)

Copy & paste this code. It links back to CalcWright — that's all we ask.

Brick and Block per square foot chart with mortar joints
Masonry reference

Brick & Block Per Square Foot

How many units cover a square foot of wall, with mortar joints.

Use the calculator →
Embed this on your site (free)

Copy & paste this code. It links back to CalcWright — that's all we ask.

Drywall sheet coverage chart — sheets, screws, compound
Walls reference

Drywall Sheet Coverage

Sheets, screws, and joint compound for a drywall job.

Use the calculator →
Embed this on your site (free)

Copy & paste this code. It links back to CalcWright — that's all we ask.

Lumber nominal versus actual size chart for dimensional lumber
Framing reference

Lumber Size Chart: Nominal vs Actual

What you order vs what you actually get (surfaced, dry).

Use the calculator →
Embed this on your site (free)

Copy & paste this code. It links back to CalcWright — that's all we ask.

Deck joist span chart Southern Pine by spacing IRC R507.5
Framing reference

Deck Joist Span Chart

Maximum joist span for Southern Pine (IRC R507.5, 40 psf live).

Use the calculator →
Embed this on your site (free)

Copy & paste this code. It links back to CalcWright — that's all we ask.

Voltage drop maximum copper wire run chart by AWG, 3 percent
Electrical reference

Voltage Drop: Max Wire Run

Longest copper run before 3% voltage drop, at the circuit's rated load.

Use the calculator →
Embed this on your site (free)

Copy & paste this code. It links back to CalcWright — that's all we ask.

Pipe size versus water flow GPM chart for copper and PEX
Plumbing reference

Pipe Size vs Water Flow

Practical flow (GPM) through copper and PEX at 2–4 ft/s.

Use the calculator →
Embed this on your site (free)

Copy & paste this code. It links back to CalcWright — that's all we ask.

Rebar size chart — number, diameter, weight, and use
Concrete reference

Rebar Size Chart

Rebar number, diameter, weight, and where each size is used.

Use the calculator →
Embed this on your site (free)

Copy & paste this code. It links back to CalcWright — that's all we ask.

Fence post depth guide — hole depth by fence height and frost
Fencing reference

Fence Post Depth Guide

How deep to set posts — the rule, plus typical frost-line depths.

Use the calculator →
Embed this on your site (free)

Copy & paste this code. It links back to CalcWright — that's all we ask.

Room air conditioner BTU sizing chart by room size ENERGY STAR
HVAC reference

Room Air Conditioner Sizing

Cooling capacity (BTU) by room size — EPA / ENERGY STAR guide.

Use the calculator →
Embed this on your site (free)

Copy & paste this code. It links back to CalcWright — that's all we ask.