Engineering Calculators

Quick calculation tools for design engineers, project engineers and technical buyers. Pick a tool below to start. Tools marked Coming soon will be released progressively.

Unit converter15 quantity groups: pressure, flow, temperature, length, mass, power, viscosity…Use now →Pipe size NPS ↔ DN ↔ ODQuick OD lookup per ASME B36.10M / B36.19M, DN6 – DN1000.Use now →Sanitary tube lookup & comparisonOD, wall, ID, kg/m and tube length per ASME BPE, 3-A, JIS G3447, SMS, DIN 11850, ISO 1127.Use now →Tank volume by liquid levelVertical/horizontal tanks; flat, 2:1 ellipsoidal, torispherical, hemispherical, conical heads; level–volume table.Use now →
Pressure vessel thickness & MAWPShells and heads per ASME Section VIII Div. 1 (UG-27, UG-32).Coming soon
Pipe & fitting weightPer ASME B36.10M / B36.19M, including fluid and insulation.Coming soon
Pressure drop – line sizingDarcy–Weisbach, recommended velocities by service.Coming soon
API 650 tank shell thicknessOne-foot method for atmospheric storage tanks.Coming soon

Unit Converter

Pick a quantity, then enter a value and unit. The result appears instantly, with equivalent values in every unit of the same group. The NPS ↔ DN ↔ OD tab is a quick pipe size lookup per ASME B36.10M / B36.19M.

Sanitary Tube Lookup & Comparison

Pick a standard, size and wall to see OD, ID, weight, volume per metre and common tube length. The comparison table shows the closest size in other standards and whether they can be welded directly.

Tank volume by liquid level

Select a vertical or horizontal tank and the head type at each end, then enter the inside diameter, straight shell length (tangent to tangent, T-T) and liquid level. The result shows the liquid volume, filling percentage, total volume, liquid mass and a level–volume (strapping) table in 5% steps.

Need a formal design calculation?

TNI engineers prepare calculation reports (PV Elite, CAESAR II) and fabrication drawings for your project.

REQUEST A QUOTE