Free Online Alloy & Metal Weight Calculators for Global Engineering

Precision Tools for Engineers, Buyers & Manufacturers

At SEATHER TECHNOLOGY, our expertise goes beyond supplying high-performance stainless steel, duplex, nickel-based super alloys (Inconel, Hastelloy, Incoloy, Monel), and non-ferrous metals. We are committed to empowering technical professionals with the data they need for flawless execution.

Our suite of professional digital calculators is designed to transform complex metallurgical data into actionable insights, making your technical decision-making process faster, more credible, and “engineering-ready.”

Comprehensive Calculation Tools

Alloy Weight Calculator

Instantly determine the theoretical weight of metal plates, bars, high-pressure pipes, and coils. Our precision tool integrates accurate density data for stainless steel, carbon steel, aluminum, and specialty alloys like Inconel, Hastelloy, and Monel. Get reliable results in both kg and lb to streamline your engineering design and procurement workflow.

kg to lbs Calculator

Simplify your international shipping and procurement with the SEATHER TECHNOLOGY Weight Calculator. In the global trade of stainless steel and high-nickel alloys, precision is vital for accurate quoting and logistics planning. Based on the standard 1 kg = 2.20462 lbs ratio, our tool provides instant, high-accuracy conversion for plates, seamless pipes, round bars, and slit coils. Ensure your technical specifications and shipping weights align perfectly with both Metric and Imperial project requirements.

mm to Inches Calculator

Seamlessly bridge the gap between Metric and Imperial systems with our Professional mm to Inches Calculator. In the global metal trade, precision is critical—especially when converting specifications for stainless steel pipes, alloy plates, and precision coils. Based on the standard 1 inch = 25.4 mm ratio, this tool provides instant, accurate decimal results, ensuring your engineering drawings and procurement orders align perfectly with both ASTM (Imperial) and EN (Metric) standards.

lbs to ton Calculator

Ensure absolute accuracy in your global metal procurement with our Pounds to Metric Ton Calculator. In the international trade of stainless steel and nickel alloys, distinguishing between the Metric Ton (1,000kg) and the US Short Ton (2,000 lbs) is critical for technical compliance and cost management. Our tool provides instant, high-precision conversion, helping engineers and exporters verify weights for alloy plates, pipes, and coils to ensure seamless alignment between American specifications and global shipping standards.

Grades Comparison Analyzer

Ensure technical compliance across global standards with the SEATHER TECHNOLOGY Grade Comparison Tool. This professional analyzer allows you to perform side-by-side chemical composition comparisons for stainless steel, nickel alloys, and titanium. Whether you are cross-referencing ASTM, EN, DIN, or JIS standards, our tool provides precise breakdowns of critical elements like Nickel, Chromium, Molybdenum, and Cobalt. Perfect for verifying that your Inconel 625 or Hastelloy C276 specifications meet the exact requirements of your project’s technical data sheet.

Alloy Materials Selection Calculator

Navigate the complexities of metallurgy with our Alloy Materials Selection Calculator. This intelligent online tool is engineered to help you choose the optimal grade for your specific project requirements, covering nickel alloys, specialized stainless steels, and titanium. By evaluating critical factors such as corrosion resistance, high-temperature stability, and mechanical strength, our calculator guides you to the right material—whether it’s Inconel for aerospace or Hastelloy for chemical processing. Make data-driven decisions to ensure long-term performance and safety.

Pipe Schedule Calculator

Instantly access precise piping specifications with our Pipe Schedule Calculator. This professional tool provides accurate Outer Diameter (OD), Wall Thickness, and Internal Diameter (ID) data based on NPS (Nominal Pipe Size) and Schedule (SCH 5S through SCH XXS). Fully compliant with ASME B36.10 and B36.19 standards, it is the ideal reference for specifying stainless steel, carbon steel, and high-nickel alloy piping in global industrial projects.

Metal Density Calculator

Accurate density data is the foundation of precise engineering. Our Metal Density Calculator provides a comprehensive database for stainless steel, carbon steel, and non-ferrous metals. Specifically optimized for the energy and chemical industries, it features precise values for high-performance nickel alloys (Inconel, Hastelloy, Monel), titanium, and duplex steel. Easily find and convert density metrics to ensure your mass and volume calculations meet global manufacturing standards.

PREN Calculator

Assess the durability of your materials with the SEATHER TECHNOLOGY PREN Calculator. This professional tool computes the Pitting Resistance Equivalent Number (PREN) based on the chemical composition of Chromium (Cr), Molybdenum (Mo), and Nitrogen (N). Essential for evaluating Super Duplex, 254SMO, and high-nickel alloys, our calculator helps engineers determine material suitability for harsh marine environments and aggressive chemical processing plants.

Welding Calculator

Optimize your fabrication costs with our precision Welding Calculator. Designed for technical professionals, this tool allows you to accurately determine weld metal volume and filler metal weight for MIG, TIG, and SMAW processes. Specifically optimized for high-nickel alloys and special stainless steels, it helps you estimate the exact consumption of welding wires and electrodes for complex joints. Ensure your project planning for Inconel, Hastelloy, and Super Duplex structures is accurate and cost-effective.

Pipe Weight Calculator

Accurately determine the theoretical weight of industrial piping with our advanced digital tool. Engineered for both seamless and welded pipes, this calculator supports a wide range of materials, including stainless steel, duplex, and high-performance nickel alloys (Inconel, Hastelloy, Monel). Simply input the Outer Diameter (OD), wall thickness, and length to get instant, precision results in kg or lb—an essential resource for engineering design and international procurement.

Bar Weight Calculator

Instantly calculate the theoretical weight of various metal profiles with our precision Bar Weight Tool. Specifically designed for specialty steel and nickel alloys, this calculator supports a wide range of shapes, including round bars, hexagonal (hex) bars, square bars, flat bars, and angle bars. Whether you are estimating shipping costs for Inconel 718 rounds or calculating material needs for Hastelloy hex nuts, get accurate weight data based on precise material density and dimensions in both metric and imperial systems.

Gauge to Thickness Calculator

Accurately translate sheet metal gauge numbers into decimal thickness in both millimeters (mm) and inches (in). Our precision tool supports multiple industry standards, including U.S. Standard (MSG) for carbon steel and Brown & Sharpe (B&S) for non-ferrous metals. Whether you are specifying stainless steel sheets, high-nickel alloy foils (Inconel, Monel), or aluminum, this calculator ensures your technical drawings and procurement orders meet exact global manufacturing tolerances.

Dimensional Tolerance Calculator

Ensure your materials meet the most rigorous global standards with our Dimensional Tolerance Tool. Specifically designed for the special stainless steel and nickel alloy industry, this calculator allows you to verify thickness, width, and length tolerances according to ASTM, EN, and ISO specifications. Whether you are managing QC compliance for aerospace or chemical processing, our tool provides the exact parameters needed for high-precision machining and material inspection.

Ton to Piece Price Calculator

Bridge the gap between bulk pricing and project budgeting with our Ton to Piece Price Calculator. Designed for the international metal trade, this tool allows you to instantly convert price per metric ton into an accurate unit price per piece based on material dimensions and density. Whether you are quoting for stainless steel pipes, Inconel bars, or Hastelloy plates, our calculator ensures your financial estimates are precise, helping you streamline your procurement workflow and cost analysis.

Hardness Conversion Calculator

Seamlessly convert between Brinell (HB), Rockwell (HRC/HRB), and Vickers (HV) scales with our high-precision Hardness Conversion Calculator. Based on standard ASTM E140 and ISO engineering reference charts, this tool is essential for verifying the mechanical properties of special stainless steels and nickel-based alloys. Whether you are checking the tempered state of 17-7 PH or the solution-treated hardness of Inconel 718, get instant, reliable data for your material certification and QC inspection.

Pressure Converter

Accurate unit conversion is critical when designing high-pressure systems. Use the SEATHER TECHNOLOGY Pressure Converter to instantly switch between global units, including PSI, Bar, MPa, and kg/cm². Specifically designed for pressure vessel engineering and piping design, this tool is essential for cross-referencing material stress checks and yield strength specifications against ASME and EN standards. Whether you are specifying Inconel 625 for subsea applications or Hastelloy for chemical reactors, ensure your technical calculations are precise.

Carbon Equivalent Calculator

Accurately evaluate the weldability of your materials with the SEATHER TECHNOLOGY Carbon Equivalent Calculator. This precision tool computes CE (IIW) and Pcm (Ito-Bessyo) values based on the complex chemical composition of carbon steel and low-alloy steels. By factoring in elements like Manganese, Chromium, Molybdenum, and Vanadium, it provides a critical assessment of hydrogen-induced cracking sensitivity. An essential resource for ensuring technical compliance in heavy engineering and high-pressure vessel fabrication.

Ra to Rz Conversion

Seamlessly convert surface finish specifications with our Roughness Conversion Calculator. In the high-precision stainless steel and nickel alloy industry, translating between Ra (Arithmetic Average) and Rz (Mean Peak-to-Valley Height) is essential for ensuring project compliance. Based on standard metallurgical reference charts, this tool helps engineers and QC inspectors align technical drawings across ISO, DIN, and ANSI standards. Perfect for verifying the finish of alloy plates, decorative sheets, and precision-machined components.

Surface Finish Calculator

Accurate surface characterization is critical for the performance of high-end alloys. Use the SEATHER TECHNOLOGY Surface Finish Tool to identify typical Ra (Roughness Average) ranges for various metal treatments. From No.1 and 2B mill finishes to high-precision No.4 Satin and 8K Mirror polishing, our calculator provides a comprehensive comparison to help you meet ISO and ASTM standards. Essential for ensuring quality control in pharmaceutical, food-grade, and semiconductor piping and plate projects.

Thermal Expansion Calculator

Accurately predict the dimensional changes of your materials with the SEATHER TECHNOLOGY Thermal Expansion Calculator. In extreme temperature environments, understanding the Coefficient of Thermal Expansion (CTE) is critical for maintaining structural integrity. Our tool helps you calculate precise linear expansion or contraction for stainless steel, nickel alloys (Inconel, Monel), and titanium. Whether you are designing high-temperature exhaust systems or cryogenic piping, ensure your engineering tolerances are backed by reliable metallurgical data.

Pressure Vessel Thickness Calculator

Optimize material usage and prevent structural failure with SEATHER’s Digital Thickness Tool. When working with high-performance alloys like Monel or Duplex steel, calculating the exact internal pressure resistance is vital for cost-effective fabrication. This tool allows you to account for service-life corrosion allowances, helping you select the perfect grade of specialty steel plate for chemical reactors, storage tanks, and heat exchangers. Achieve maximum durability with engineering-ready calculations.

Alloy Grade Equivalent Calculator

Seamlessly compare international material standards with the SEATHER TECHNOLOGY Grade Converter. This professional tool provides an instant cross-reference for stainless steel, nickel alloys, and carbon steel across major global systems, including AISI/ASTM (USA), EN (Europe), DIN (Germany), GB (China), JIS (Japan), and GOST (Russia). Whether you are searching for an equivalent for Inconel, Hastelloy, or specialized duplex grades, our database ensures technical compliance for international engineering projects.

ft to m Calculator

Eliminate calculation errors when working with mixed imperial and metric technical drawings. SEATHER’s ft to m Converter is specifically designed for engineers and procurement specialists in the metal industry. Quickly determine the total length of Inconel tubing, the width of Hastelloy plates, or the span of duplex steel sections. Whether you are finalizing a packing list or verifying warehouse inventory, get the engineering-ready data you need for seamless global logistics.

Currency Conversion Calculator

Streamline your international procurement with our Live Currency Conversion Calculator. In the volatile market of special stainless steel and nickel alloys, precise financial calculations are vital for global contract discussions. This tool provides real-time exchange rates for major currencies (USD, EUR, GBP, CNY, and more), specifically designed to support multi-currency quotations and cross-border logistics. Ensure your Inconel or Hastelloy pricing remains competitive and accurate in any local market.

HS Code Calculator

Simplify your international logistics with our Alloy HS Code Finder. This specialized tool helps you identify the correct Harmonized System (HS) codes for nickel alloys, special stainless steels, and titanium products. Ensure accurate customs clearance and tariff classification for your global shipments. Whether you are exporting Hastelloy pipes or importing Inconel sheets, our database streamlines the documentation process for seamless cross-border trade.

Coil Calculator

Optimize your production and logistics with our professional Coil Calculator. Designed for high-precision slitting and processing, this tool allows you to accurately determine coil weight, strip length, and outer diameter (OD) based on material thickness and width. Whether you are working with stainless steel, nickel-based alloys (Inconel, Hastelloy, Monel), or carbon steel, get instant results in both metric and imperial units to ensure material yield and cost efficiency.

Plate Weight Calculator

Accurately determine the theoretical weight of metal plates and sheets with SEATHER’s professional calculation tool. Whether you are working with standard stainless steel (316L, 304) or specialized nickel alloys (Inconel 718, Hastelloy C276, Monel 400), our calculator uses precise density values to provide instant results. A must-have tool for engineering design, rapid quotation, and global logistics planning to ensure your material costs and shipping weights are always on target.

Comprehensive Calculation Suite

Whether you are in the design phase or managing a complex procurement project, our tools provide instant accuracy for:

Theoretical Weight Estimation: Calculate weights for coils, plates, sheets, pipes, and bars across various alloy densities.

Dimensional Tolerance Checks: Verify technical specifications against international standards.

Coil Output & Slitting Calculations: Optimize material usage and minimize waste during processing.

Weldability & Material Assessment: Evaluate technical compatibility for demanding industrial applications.

Why Use SEATHER TECHNOLOGY Digital Tools?

In the world of special stainless steel and high-nickel alloys, precision is the difference between profit and loss. Our goal is to help you:

Eliminate Manual Errors: Replace risky manual calculations with verified digital logic.
Accelerate Quotations: Get instant data to speed up your design and procurement cycles.
Optimize Cost Management: Gain certainty in material consumption and selection to avoid over-ordering.
Bridge Technical Gaps: Access professional-grade tools anytime, anywhere—no installation required.

Benefit	What You Gain
Accurate Weight, Size & Consumption	Prevents under-ordering or material shortage
Supports 10+ Materials	Stainless steel / Duplex / Aluminum / Copper / Brass / Titanium / Nickel based alloys
Covers Every Common Shape	Plate / Sheet / Coil / Pipe / Bar / Angle Bar / Channel / Beam
For Production & QC Teams	Helps CNC machining, cutting, bending, tolerance checking, Ra polishing reference
For Global Trade Users	Speeds up quotations, cost estimation, and logistics shipping & planning
100% Free To Use	No login required. Always online available

Recommended Use Tools

Empower your entire procurement workflow with SEATHER TECHNOLOGY’s digital tool suite.

From initial material selection to final international shipping, our calculators are designed to optimize every link in your supply chain.

Procurement & Weight Estimation: Accurately calculate the weight of alloy plates, seamless pipes, and slit coils to streamline your pre-purchase budgeting.

Technical Verification: Assess material integrity with our PREN (Corrosion Resistance) and CE (Weldability) calculators, ensuring compliance with ASTM and EN standards.

Production & Yield Optimization: Maximize efficiency with tools for strip yield analysis, cutting output estimation, and weld filler metal usage.

Global Trade Logistics: Instant conversion between Metric and Imperial systems (mm-inch, kg-lbs, lbs-ton) and ton-to-piece pricing to simplify your export quotations and contract discussions.

From factory-floor processing to cross-border delivery, SEATHER provides the engineering precision you need for Inconel, Hastelloy, Incoloy, Monel, and specialty stainless steels.