Hydraulic Fracturing HHP & Surface Pressure Calculator

Determine surface treating pressure (STP), required hydraulic horsepower (HHP), and pumping fleet truck counts for high-rate slickwater and gel frac jobs.

Wellbore & Treatment Hydraulic Inputs

Target Pumping Rate Q (bbl/min):

Formation Breakdown / ISIP (psi):

True Vertical Depth TVD (ft):

Measured Depth MD (ft):

Casing Inside Diameter ID (in): 4.778 in = 5.5" 20 lb/ft casing

Average Slurry Density (ppg):

Perforation Friction ΔP_perf (psi):

Friction Reducer Efficacy (% reduction):

Hydraulic Horsepower & Fleet Demand

Surface Treating Pressure (STP):

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Hydraulic Horsepower (HHP):

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Hydrostatic Head P_hyd:

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Pipe Friction Loss ΔP_pipe:

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2,500 HHP Pump Trucks (at 80% load):

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Total Fleet Horsepower Required:

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Frequently Asked Questions

Where does the 40.8 constant in the HHP equation come from?

The conversion factor comes from: 1 hp = 33,000 ft-lbf/min. One barrel of fluid is 5.615 cubic feet, and 1 psi = 144 lbf/sq ft. Combining these unit conversions: (144 × 5.615) / 33,000 = 1 / 40.8.

How does friction reducer (FR) affect fleet size?

Polyacrylamide friction reducers suppress turbulent eddies along the casing wall, eliminating 60% to 75% of pipe friction. Without FR, pumping 80 bpm down 15,000 ft of casing would create over 10,000 psi of friction loss alone, making deep horizontal fracturing physically impossible.