Free Engineering Tools

Professional calculators and reference tools for piping engineers, contractors, and procurement specialists. No signup required.

Pressure Unit Converter

Convert between PSI, Bar, kPa, MPa, atm, and other pressure units instantly.

Convert between GPM, m³/h, L/min, and other flow rate units for pump and pipe sizing.

Estimate TDH from pipe length, diameter, flow, fittings, elevation, and discharge pressure.

Estimate NPSHa from suction pressure, fluid temperature, specific gravity, and suction line loss.

Calculate flow coefficient (Cv) for valve sizing. Supports liquid and gas applications.

ASME B16.5 flange bolt specifications. Find bolt quantity, size, and length by pressure class.

Calculate flange bolt or stud length from stack-up dimensions.

Look up OD, wall thickness, ID, and weight per foot for standard pipe schedules.

Calculate steel pipe weight from OD, wall thickness, and length.

Convert nominal pipe size (NPS) to DN and vice versa.

Understand Cv, flow coefficient, and sizing basics.

How SCH affects OD, wall thickness, and ID.

Choose the right flange for your application.

Compare performance for isolation and control.

Key factors for pump sizing and selection.

Pressure-temperature ratings and limits.

Browse our catalog of valves, pipe fittings, flanges, and pumps. Request a quote for competitive pricing.