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Pressure Washing Coverage Calculator

Estimates time and cost for pressure washing based on surface type (concrete, deck, siding, roof), equipment PSI, and soil condition. Includes per-sqft pricing by surface.

Results

Time Estimate
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Recommended Price
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Per Sqft Rate
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Effective Sqft/Hr
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Surface Pricing Guide ($/sqft)

Concrete (light) $0.08 - $0.15
Deck / Wood $0.15 - $0.30
Vinyl Siding $0.20 - $0.40
Roof $0.40 - $0.75

Coverage rates based on ISSA and 2026 pressure washing industry data. Minimum job: $150-200.

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How to Use This Calculator

1. Select the surface type. Each surface has a different base coverage rate. Concrete is the fastest; roof is the slowest due to safety and care requirements.

2. Enter the area. Measure or estimate the square footage to be cleaned. For driveways, multiply length by width. For siding, estimate wall area.

3. Set condition and equipment. Heavy algae and stains slow you down significantly. A surface cleaner attachment speeds up concrete work by 50%.

4. Check the per-sqft rate. Compare your calculated rate against the industry guide to ensure competitive and profitable pricing.

How the Formula Works

The calculator starts with surface-specific coverage rates, then adjusts for equipment and condition.

Adjusted_Rate = Base_Rate x Equipment_Multiplier x Condition_Factor

Time_Hours = Sqft / Adjusted_Rate

Total = Time_Hours + 0.25 hrs (setup/teardown)

Price = Total_Hours x Billable_Rate

Equipment multipliers: Basic 2500 PSI (0.8x), Pro 4000 PSI (1.0x baseline), Surface cleaner (1.5x, concrete only). Condition factors: Light (1.0x), Moderate (0.85x), Heavy (0.65x).

Frequently Asked Questions

How much should I charge for pressure washing per square foot?
Pressure washing rates vary by surface: concrete $0.08-0.35/sqft, deck/wood $0.15-0.30/sqft, vinyl siding $0.20-0.40/sqft, and roof $0.40-0.75/sqft. The national average is $0.42-0.52/sqft across all surfaces. Heavy soiling commands premium pricing.
How long does pressure washing take?
With a pro 4000 PSI unit, concrete cleans at about 800 sqft/hr, vinyl siding at 500 sqft/hr, and decks at 400 sqft/hr. A surface cleaner attachment boosts concrete rates to 1200 sqft/hr. Add 15 minutes for setup/teardown. A typical 2000 sqft driveway takes 2.5-3 hours.
What is the minimum charge for pressure washing?
Most pros set a minimum job charge of $150-200 to cover vehicle dispatch, fuel, equipment wear, and setup time. Even a small job (500 sqft concrete) takes 30+ minutes of setup and teardown plus drive time, so the minimum ensures profitability.

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