Coming soon
Thermal Expansion
Length change from the coefficient you enter, the original length and ΔT.
Steel calculators, built for the shop floor
Weight, unit conversion and welding calculators — every tool on Steel Equivalents shares the same fast, sourced, print-ready frame. Pick a tool below.
- 17Calculators
- 6,600materials
- 28,825designations
Weight
6 calculators
Round Bar Weight
Weight of round steel bars per piece and per metre.
Flat / Sheet / Plate & Square Bar
Weight of flat bar, sheet, plate and square-section bar.
Tube & Ring Weight
OD/ID or OD/wall-thickness — weight of tube and ring stock.
Hexagon Bar Weight
Weight of hex-section bar from across-flats and length.
Rebar Weight
Nominal mass per metre for standard reinforcement bar sizes.
Coil Weight
Weight and remaining length of steel coil from OD, ID and width.
Conversion
4 calculators
Hardness Converter
HB / HRC / HV / Rm — lookup table per material class (ASTM A370 / ISO 18265), refused outside its stated range, never a universal formula.
Sheet Gauge / mm
Standard gauge number to millimetre thickness, by sheet type.
MPa / ksi & J / ft·lbf
Stress and impact-energy unit conversion for mill certificates.
Welding
4 calculators
Carbon Equivalent (CEV / CET / Pcm)
Weldability from chemical composition, three standard formulas.
Preheat Temperature
Minimum preheat per EN 1011-2, from CET, thickness and hydrogen scale.
PREN
Pitting resistance equivalent number for stainless grades.
Chromium & Nickel Equivalent (WRC-1992)
Cr-eq and Ni-eq for weld metal — the two WRC-1992 diagram coordinates.
Forming & machining
3 calculatorsComing soon
Press Brake Tonnage
Air-bend force in a standard V-die, from Rm, thickness, length and die opening.
Coming soon
Bend Allowance
Flat pattern from the K-factor: bend allowance, deduction and outside setback.
Coming soon
Speeds and Feeds
Spindle speed and feed rate from your own cutting data — we publish none.
01 · SOURCED
Every formula ships with its standard or textbook source — EN 10025-1, EN 1011-2, ISO 18265. No guessed constants.
02 · RANGE-CHECKED
Inputs outside a formula's valid range are refused, never silently extrapolated or clamped.
03 · WORKS OFFLINE-FIRST
Every calculator is a real form. It computes correctly with JavaScript switched off; JS only adds live recompute.
Calculator hub — frequently asked
Are these calculators free to use?
Yes — every calculator on this page is free, with no account or login required.
How accurate are the results?
Each calculator uses standard engineering formulas with published source references, and the weight calculators use each grade's own measured density rather than a generic constant. Results are for estimation — for critical structural work, always verify against certified mill data.
Can I use these on mobile, on site?
Yes — every calculator is fully responsive and works without an internet connection once the page has loaded.