Engineering Calculators

High-precision unit converter for professional engineering applications.

High precision calculation of steam thermodynamic and transport properties, including saturation and subcooled/superheated regions.

Metal and non-metal straight-pipe wall thickness (GB/ASME); optional GB/T 17395 OD match notes; GB/T 20801.1-2025 appendix B allowable stress; schedule adequacy screening.

Obana (1982) Ch.9 — fouling extrapolation and geometry correction.

Blind plate clamped between flanges per GB 50316-2000 (2008) §6.7.2 or ASME VIII UG-34. Not flat covers.

Mass from OD, wall thickness, length and density; enter dimensions manually. Local spot checks in your browser.

GB 50316 §6.6.1, GB/T 150.3-2024 Eq. (7-40), and ASME VIII UG-34 flat cover thickness—not blind plates between flanges (§6.7.2).

Calculate resistance coefficients (K) accurately for valves and fittings using the Crane TP-410 method.

Volumetric flow, initial velocity, pipe sizing and wall thickness; enter Dₒ and t manually.

Comprehensively calculates pump head, max installation height, NPSH, and cavitation safety check. Supports NPSHr and safety margin input.

Handbook-style volume and surface area for cylinders, cones, spheres, caps, zones, and ellipsoids.

Choose the length calculation basis first (GB/T 9125, generic axial stack, EN, or ASME context). Estimate bolt/stud nominal length from flange thickness, gasket, nuts, and washers—in GB mode using informative GB/T 9125-series annex patterns (GB/T 9125.1—2020 PN, GB/T 9125.2—2020 Class; partially replaces GB/T 9125—2010). You supply dimensions from the governing flange standard.

Calculate the flow coefficient (Kv) for valves based on flow rate and pressure drop.

ASME B31.3 style area reinforcement for set-on branches; design conditions and nominal wall thickness entered manually; optional oblique angle, set-in and multi-opening screening.

Calculate pressure drop for incompressible fluid flow in pipes.

Screening-level mass for butt-weld fittings (elbows, tees, crosses, reducers, stub ends, caps); wide DN/NPS coverage; carbon Sch5–Sch160 / STD/XS/XXS and stainless 5S–80S schedules where tabulated, or custom OD/wall. Sources and limits are explained in the engineering section below.

Calculate natural and loose earthwork volume.

Calculate material weight based on volume and density.