Sump Pump Calculator — GPH Sizing Tool

Calculate sump pump horsepower by pit size, water table level, and discharge requirements

Required GPH

2,899

HP

0.5 HP

Annual

$67/yr

Pit Diameter (inches)

Pit Depth (inches)

Vertical Lift (ft)

Horizontal Run (ft)

Battery backup system

Pump Sizing

Recommended

0.5 HP

2,899 GPH @ 10 ft head

Watts

600W

Pit Volume

26 gal

Cost Estimate

Pump$120 – $300

Installation$300 – $800

Battery Backup$300

Total$720 – $1,400

Annual Energy$67/yr (480 kWh)

Sizing Guide

HP	GPH	Best For
1/3	Up to 1,800	Light use, low water table
1/2	Up to 3,000	Most residential
3/4	Up to 4,500	High water table
1	4,500+	Heavy flooding, long runs

What You'll Need

JACO ThreadPro High-Density Thread Seal Tape - 1/2" x 125 ft. (Mega Roll) | Professional PTFE Pipe Sealant | Plumbers Tape

JACO ThreadPro High-Density Thread Seal Tape - 1/2" x 125 ft. (Mega Roll) | Professional PTFE Pipe Sealant | Plumbers Tape

SharkBite 3/4 Inch And 1 Inch ContracTor Kit, Push To Connect Fitting, 22795LF

SharkBite 3/4 Inch And 1 Inch ContracTor Kit, Push To Connect Fitting, 22795LF

Dixon Valve TTB75 PTFE Industrial Sealant Tape, -212 to 500 Degree F Temperature Range, 3.5mil Thick, 520" Length, 3/4" Width, White

Dixon Valve TTB75 PTFE Industrial Sealant Tape, -212 to 500 Degree F Temperature Range, 3.5mil Thick, 520" Length, 3/4" Width, White

BOSCH GLM100-23 100 Ft BLAZE Laser Distance Measure, Includes 2 AA Batteries

BOSCH GLM100-23 100 Ft BLAZE Laser Distance Measure, Includes 2 AA Batteries

Stanley FatMax 25 ft. L x 1.25 in. W Magnetic Tape Measure Yellow 1 pk

Stanley FatMax 25 ft. L x 1.25 in. W Magnetic Tape Measure Yellow 1 pk

JACO ThreadPro High-Density Thread Seal Tape - 1/2" x 125 ft. (Mega Roll) | Professional PTFE Pipe Sealant | Plumbers Tape

JACO ThreadPro High-Density Thread Seal Tape - 1/2" x 125 ft. (Mega Roll) | Professional PTFE Pipe Sealant | Plumbers Tape

SharkBite 3/4 Inch And 1 Inch ContracTor Kit, Push To Connect Fitting, 22795LF

SharkBite 3/4 Inch And 1 Inch ContracTor Kit, Push To Connect Fitting, 22795LF

Dixon Valve TTB75 PTFE Industrial Sealant Tape, -212 to 500 Degree F Temperature Range, 3.5mil Thick, 520" Length, 3/4" Width, White

Dixon Valve TTB75 PTFE Industrial Sealant Tape, -212 to 500 Degree F Temperature Range, 3.5mil Thick, 520" Length, 3/4" Width, White

BOSCH GLM100-23 100 Ft BLAZE Laser Distance Measure, Includes 2 AA Batteries

BOSCH GLM100-23 100 Ft BLAZE Laser Distance Measure, Includes 2 AA Batteries

Stanley FatMax 25 ft. L x 1.25 in. W Magnetic Tape Measure Yellow 1 pk

Stanley FatMax 25 ft. L x 1.25 in. W Magnetic Tape Measure Yellow 1 pk

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Example Calculations

1Standard Residential

Inputs

ProjectMedium home

ScopeStandard

Result

ResultSee calculator

Enter your dimensions for accurate estimates.

2Large Project

Inputs

ProjectLarge home

ScopeFull

Result

ResultSee calculator

Larger projects need proportionally more materials.

Show all examples

Frequently Asked Questions

Q

How does this calculator work?

Enter your project dimensions and specifications to get material quantities, sizing, and cost estimates based on industry-standard formulas.

Input dimensions and project specs for accurate results
Calculations use standard industry formulas and sizing tables
Results include material quantities and cost ranges
Adjust inputs to compare different scenarios

Q

How accurate are these estimates?

Material quantities are within 5–10% of actual needs including waste. Cost estimates use national averages and vary 20–30% by region.

Material quantities accurate within 5–10% with waste factor
Cost estimates based on national averages, vary by region
Sizing follows industry standards and building codes
Verify with local codes and professional assessment

Q

Should I hire a professional?

Many aspects are DIY-friendly, but electrical, plumbing, and structural work typically require permits and professional expertise.

DIY-friendly: material purchasing, basic assembly, surface work
Professional recommended: electrical, plumbing, structural changes
Always check local codes and permit requirements first
Professional install adds 40–60% but ensures code compliance

Q

What building codes apply?

Building codes vary by jurisdiction but generally follow IRC for residential. Check with your local building department for specific requirements.

IRC covers most residential construction requirements
Electrical work: NEC applies nationwide
Plumbing: UPC or IPC depending on jurisdiction
Always pull required permits to maintain insurance coverage

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Last Updated: Jun 11, 2026

This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.