Calculators

Steel & Metals Calculators

Alloy-aware math for coil weight, PIW, lineal feet, sheet weight, max OD, unit conversions, and hardness. Densities from ASM Handbook and the Aluminum Association; tolerances per ASTM A568; coating data per A653/A792; hardness per ASTM E140.

Coil Weight

Estimate the weight of a slit or master coil from OD, ID, and width. Pick the alloy for accurate density; toggle product form to see the ASTM A568 theoretical-vs-actual range.

Outside diameter (in)Inside diameter (in)Width (in)

AlloyCoatingProduct form

Theoretical coil weight34,213 lb

In tons17.11 ton

PIW (pounds per inch of width)712.8 lb/in

Actual range (±2.5% per ASTM A568)33,357 … 35,068 lb

Density: 7.85 g/cm³ (0.2836 lb/in³). Source: ASM Handbook Vol. 1.

Coil Lineal Feet

Estimate how many feet of strip are wound on a coil of a given base gauge and coating.

Outside diameter (in)Inside diameter (in)Base gauge (in)

Coating

Approximate length3,491 ft

In inches41,888 in

Effective wrap thickness60.00 mil (0.0600 in)

Flat Sheet Weight

Calculate per-sheet and total weight, with alloy density and coating mass per ASTM A653/A792.

Length (in)Width (in)Gauge (in)Quantity (pcs)

AlloyCoatingProduct form

Per sheet (theoretical)78.41 lb

Per sheet — actual range (±4.5%)74.88 … 81.94 lb

Total78 lb (0.04 ton)

Density: 7.85 g/cm³ (0.2836 lb/in³). Tolerance band from ASTM A568 for cold-rolled sheet at 0.060" gauge.

Coil Feet from Weight

Given a coil's weight, width, gauge, alloy, and coating — estimate lineal feet and PIW.

Coil weight (lb)Width (in)Gauge (in)

AlloyCoating

Approximate length2,041 ft

PIW416.7 lb/in

Max Coil OD

Will a target coil weight fit your line's max OD? Computes finished OD from weight, ID, width, gauge, alloy, and coating.

Target weight (lb)Mandrel ID (in)Width (in)Gauge (in)

AlloyCoatingLine max OD (in)

Finished OD47.65 in

Lineal length2,041 ft

Fits line max OD?Yes

Universal Coil Solver

Enter ID, width, gauge, alloy, coating, and ANY one of: OD, weight, or lineal feet — solver fills in the rest.

OD (optional) (in)ID (in)Width (in)Gauge (in)Weight (optional) (lb)Length (optional) (ft)

AlloyCoating

Solved length— ft

Solved weight— lb

Solved OD— in

PIW— lb/in

Priority: a given length overrides a given weight, which overrides a given OD. Leave the field you want solved blank.

Unit Conversions

Length, mass, stress, and coating weight — all factors per NIST SP 811.

Length (in)

Millimeters25.400 mm

Mils1,000.0 mil

1 mm =0.03937 in

Mass (lb)

Kilograms0.4536 kg

Tons (short)0.0005 ton

Tonnes (metric)0.0005 t

Stress (ksi)

Megapascals344.7 MPa

PSI50,000 psi

1 MPa =0.14504 ksi

Coating weight (oz/ft²)

Grams per m²274.6 g/m²

1 g/m² =0.00328 oz/ft²

Hardness Converter

Convert between HRC, HRB, HV, HBW, HR15T, and HR30T per ASTM E140 Table 1 (non-austenitic steels). Conversions are approximate.

Value (HRC)From scale

Rockwell B (HRB)out of range

Vickers (HV)292.0

Brinell (HBW, 3000 kgf, 10 mm ball)277.0

Rockwell Superficial 15T (HR15T)86.9

Rockwell Superficial 30T (HR30T)72.5

Reference: ASTM E140 Standard Hardness Conversion Tables for Metals. Values interpolated from published anchor points; use the standard for contractual conversions.

PIW — Pounds per Inch of Width

Standalone PIW calculator. Common slitter and processing-line metric for coil density.

Coil weight (lb)Width (in)

PIW416.67 lb/in

Decimal · Fraction · mm

Convert any sheet thickness or dimension between decimal inches, fractional inches (to 1/64), and millimeters.

Input asValue

Decimal inches0.06250 in

Fraction (nearest 1/64)1/16

Millimeters1.588 mm

Mils62.5 mil

Sheet Metal Gauge Chart

Nominal decimal thickness (inches) for Manufacturers' Standard Gauge (carbon steel, ASTM A568), Galvanized Sheet Gauge (ASTM A653), and American Wire Gauge (aluminum, copper, brass).

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Gauge	Carbon Steel (in)	Galvanized (in)	AWG / Al · Cu (in)	Steel (mm)
3	0.2391	0.2294	0.2294	6.073
4	0.2242	0.2145	0.2043	5.695
5	0.2092	0.1994	0.1819	5.314
6	0.1943	0.1845	0.1620	4.935
7	0.1793	0.1695	0.1443	4.554
8	0.1644	0.1546	0.1285	4.176
9	0.1495	0.1397	0.1144	3.797
10	0.1345	0.1247	0.1019	3.416
11	0.1196	0.1098	0.0907	3.038
12	0.1046	0.0948	0.0808	2.657
13	0.0897	0.0799	0.0720	2.278
14	0.0747	0.0677	0.0641	1.897
15	0.0673	0.0635	0.0571	1.709
16	0.0598	0.0561	0.0508	1.519
17	0.0538	0.0508	0.0453	1.367
18	0.0478	0.0456	0.0403	1.214
19	0.0418	0.0394	0.0359	1.062
20	0.0359	0.0336	0.0320	0.912
21	0.0329	0.0306	0.0285	0.836
22	0.0299	0.0276	0.0253	0.759
23	0.0269	0.0247	0.0226	0.683
24	0.0239	0.0217	0.0201	0.607
25	0.0209	0.0187	0.0179	0.531
26	0.0179	0.0157	0.0159	0.455
27	0.0164	0.0142	0.0142	0.417
28	0.0149	0.0127	0.0126	0.378
29	0.0135	0.0112	0.0113	0.343
30	0.0120	0.0097	0.0100	0.305

Source

Compiled by Metal Master Sales Corp. from the following primary standards:

Carbon Steel — Manufacturers' Standard Gauge (MSG) for uncoated carbon-steel sheet, per ASTM A568 / A480.
Galvanized — Galvanized Sheet Gauge (GSG) for hot-dipped galvanized sheet, per ASTM A653.
AWG / Al · Cu — American Wire Gauge (Brown & Sharpe) for aluminum, copper, and brass sheet, per The Aluminum Association.
Steel (mm) — converted from the Carbon Steel column at 1 in = 25.4 mm (NIST SP 811, exact).

Values are nominal decimal thicknesses; tolerances per the applicable ASTM standard apply.

Calculators are provided for estimating only. Results assume nominal alloy density and ASTM A568 tolerance bands; coating mass per ASTM A653/A792; hardness per ASTM E140. Actual weights vary with heat chemistry, gauge variation, oil, and packaging. Confirm with your Metal Master rep before placing a release.