Pipe weight. Concrete yardage. Wire size. Bolt torque. Board feet. Everything you'd otherwise be googling on a ladder — in one place, mobile-first, fast.
Every calculator is single-page, mobile-friendly, and works offline once loaded. Inputs in feet, inches, mm, or fractions — your call.
Weight per foot for steel, stainless, copper, and PVC pipe — Sch 10 through XXS.
Fluid capacity in gallons, liters, and cubic feet for any pipe size and length.
Developed length, bend allowance, and springback for hand- and machine-bent tube.
Kick angles, travels, and rises for every tube in a multi-tube rack. Symmetric pairs grouped automatically.
Darcy-Weisbach pressure loss for water and common fluids over a straight pipe run.
Per-bolt torque for ASME B16.5 flanges — B7, B8M, B16, lubricated or dry.
NEC-compliant ampacity sizing for copper and aluminum conductors, THHN/THWN.
One-way and round-trip voltage drop for any wire size, length, and load.
EMT, IMC, RMC, and PVC fill per NEC Chapter 9 — 40%, 31%, 53% rules built in.
Solve for volts, amps, ohms, or watts — any two values give you the other two.
Cubic yards, cubic feet, and 80-lb bag count for slabs, footings, columns, and post holes.
Weight per foot for #3 through #11 rebar plus a grid-pattern cut list generator.
Brick and CMU count plus mortar bags for a given wall area, with 5% waste built in.
Rise, run, and stringer length for code-compliant stairs — IRC 7-3/4 max rise, 10 min tread.
Common rafter length, plumb and seat cuts for any pitch from 1/12 through 12/12.
Lumber board feet from thickness × width × length, with piece count and waste factor.
Inches and feet — decimal to fractions (to 1/64) and back. Tape-measure friendly.
Recommended amperage and heat input for stick, MIG, and TIG by electrode and thickness.
Round and rectangular duct size from CFM target and friction rate.
Gallons needed for any wall area with primer pass, second coat, and waste factor.
Sling tension at any angle for two- and four-leg picks. With OSHA D/d ratio reminders.
Simply supported beam — max moment, shear, and deflection for point and distributed loads.
Extension and retraction force, flow rate, and cycle time from bore, rod, and pressure.
Required flow coefficient for control valve sizing — liquids and gases. ISA-75.01 formula.
Required kVA from load amps and voltage, or secondary amps from a known kVA rating. NEC 450.3 OCPD sizing.
Full load amps per NEC 430.248 / 430.250 — plus branch circuit conductor and OCPD sizing.
Sheet count for plywood, OSB, drywall, or any panel material — with waste factor.
OD, wall, ID, weight for every pipe size from 1/8" through 24", Sch 5 through XXS.
SAE Grade 2/5/8, ASTM A193 B7/B8M/B16, and metric 8.8/10.9/12.9 — proof load and tensile.
Bolt circle, bolt count, OD, raised-face dimensions for 150# through 2500# flanges.
Tap drill sizes for UNC, UNF, and metric threads — 50%, 65%, 75% thread engagement.
AISC wide-flange dimensions and properties — Sx, Ix, weight, and depth for common W shapes.
Nut hex, body hex, makeup turns, and pressure ratings for 1/8" through 1" OD tube fittings.
Print-ready JHA, toolbox talk, timesheets, inspection checklists, work orders, and more — blank or fill-in-the-field.
Short, no-fluff guides on the stuff that actually trips people up in the field.
How to read an ISO without confusing yourself — symbols, dimensioning, north arrow, BOM.
The dozen things that get tubing runs rejected at sign-off — and how to avoid them.
The conductor ampacity table every electrician memorizes, condensed to one page.