Carpentry & Framing
Stairs, roofs, walls, and square footage.
Architectural Dimensions
Add and subtract running feet, inches, and fractions down to 1/16" for job site blueprints.
Beam Depth Calculator
Get a quick span-to-depth estimate for headers and lintels using standard rule-of-thumb ratios.
Foundation Square-Up Calculator
Check that a layout is square with the 3-4-5 rule and get the exact matching diagonal measurement.
Roof Pitch & Rafter Length
Find the rise-over-run pitch, rafter length, and roof angle for a residential roof.
Square Footage & Multi-Area
Add up multiple room or surface areas at once, with a built-in waste allowance for material orders.
Stair Riser & Tread Layout
Lay out a code-checked stair: riser and tread counts, stringer length, and a materials list.
Concrete & Foundation
Pour volume and material estimates.
Concrete Volume & Void Calculator
Estimate cubic yards for a pour, with support for subtracting interior voids and blockouts.
Piping, Plumbing & Process
Offsets, volumes, and thermal movement for pipe and tank work.
Pipe Offset & Travel Calculator
Get center-to-center travel, roll length, and cut length for common pipefitting offset angles.
Pipe Volume & Weight Calculator
Find the internal fluid volume and empty steel weight for a run of pipe by nominal size.
Thermal Expansion Calculator
Calculate how much a pipe run will grow or shrink in length across a given temperature swing.
Tank & Vessel Volume
Work out holding capacity for cylindrical or rectangular tanks and process vessels.
Machining & Fabrication
Shop-floor specs for metalwork and CNC.
Sheet Metal Bend Allowance
Calculate flat blank length, bend allowance, and setback for a sheet metal bend.
Bolt Circle Layout Coordinator
Get X/Y coordinates for every hole in a bolt circle or flange pattern, plus a visual layout.
Spur Gear Parameters
Find pitch diameter, outside diameter, and tooth spacing for an involute spur gear.
Machinist Speed & Feed
Get spindle RPM and feed rate for a mill or drill, with material presets for common metals.
Tap Drill Size & Threads
Look up the correct pilot drill size and decimal equivalent for a given tap and thread pitch.
Conversions & Reference
Switch between units and drawing scales.
Drawing Scale Converter
Convert a paper drawing measurement to its real-world size for any common architectural or engineering scale.
Standard Trade Unit Converter
Convert length, weight, pressure, torque, and wire gauge across imperial and metric trade units.