# Pump Calculators.

Pump Calculator, Pressure to Head, Mass Flow to Volumetric Flow , Net Positive Suction Head, Pump Head, Pump Power, Pump Torque, Temperature Rise, Fluid Velocity, Velocity Head

Online Suction Specific Speed Calculator at Best Efficiency point . Suction Specific Speed at BEP Formulas: Imperial Units: Ns = ( N * (Q)1/2 ) / (NPSH)3/4. where: Ns = specific speed. N =... Read more

Online Pump Specific Speed Calculator at Best Efficiency point . Pump Specific Speed at Best Efficiency Point Formulas: Imperial Units: Ns = ( N * (Q)1/2 ) / (H)3/4. where: Ns = specific... Read more

Online Fluid Velocity Calculator. Fluid Velocity Formulas: Imperial Units: V = ( 0.409 * Q ) / d2. where: V = velocity, ft/s. Q = flow, gpm. d = pipe inside diameter, in. SI Units: V = ( 35... Read more

Online Pump Temperature Rise calculator. Pump Temperature Rise Formulas: Imperial Units: ΔT = (H * (1 – η ) )/(778 * U* η). where: ΔT = temperature rise, °F. H = total head, ft. η = pu... Read more

Online Pump Torque calculator. Pump Torque Formulas: Imperial Units: τ = (5250 * P) / N. where: τ = torque, ft-lbf. P = pump power, hp. N = pump speed, rpm. SI Units: τ = (9450 * P) / N. whe... Read more

Online Pump Power calculator. Pump Power Formulas: Imperial Units: P = (Q * H * SG) / (3960 * η) where: P = power, horse power. H = head, ft. Q = flow, gpm. SG = specific gravity. η= pump ef... Read more