Price a measured surface, not a pressure setting.
Area = length × width for a rectangle. Deduct or separately measure excluded sections before you enter dimensions. For a driveway that widens or has a separate apron, use the driveway measurement tool.
This calculator prices the scope you entered. It does not recommend pressure, a nozzle, detergent, a surface treatment or a safe operating technique.
Build the customer charge from area.
Area × your surface rate gives the base charge. Your condition adjustment applies to that charge; customer travel and extras are added afterwards. Apply your chosen minimum to the subtotal.
A condition percentage is a price assumption you choose, not a verified productivity benchmark. An optional target-margin comparison is separate from the customer charge.
Check time independently of area.
Enter on-site, travel and setup/packing elapsed time separately. Sum those hours before multiplying by crew size and your cost per worker-hour.
Two 60m² surfaces can have different entered time assumptions. The model does not infer time from surface area or claim a universal cleaning speed.
Change measurement units without changing the job.
One foot is0.3048 metre exactly. One square foot is0.09290304 square metre, calculated by squaring the length factor. A£4/m² rate represents£0.37161216/ft² for the same charge, not£4/ft².
The browser unit control converts entered lengths and corresponding rates together. Currency selection supplies GBP or USD formatting only; it does not convert prices or costs using an exchange rate.
Follow the area formula without scripts.
With JavaScript disabled, use the visible GBP/metres worksheet, formula and fixed example. No automatic output is claimed. To price a US scenario manually, use feet with your own USD/ft² rate and keep all cost entries in USD.
Illustrative arithmetic / not market rates
A60m² patio with an entered time assumption
10m ×6m; £4/m²; condition0%; customer travel£15; minimum£100. All prices/time inputs hypothetical.
Declared scenario
EXAMPLE ONLY- Measured area
- 60m²
- Area charge
- £240.00
- Customer travel
- £15.00
- Customer charge
- £255.00
- 4 elapsed hours ×1 ×£25 +£40 other costs
- £140.00
- Profit after entered costs
- £115.00
The four hours are2.5 on-site,1 travel and 0.5 setup. Margin is45.10%. If on-site time alone rises by one hour at the same labour cost, costs become£165 and profit£90. This is sensitivity to your assumption, not a production-speed claim.
Scenario record checked . Read the formula and scenario register.
Review the assumptions
A checklist for this page
- Confirm included area and exclusions.
- Match the surface rate to the selected area unit.
- Keep time estimates independent from any unsupported productivity average.
- Compare internal costs with customer charges.
Pressure washing pricing: questions
Can I use this for power washing?
For the same area-based pricing job, yes. It does not select equipment or a cleaning method; no separate synonym calculator is needed.
Does the target margin change my entered charge?
No. It produces a comparison price from your entered costs and fees; your customer charge remains based on the area rate, extras and minimum.
What if the surface is not rectangular?
Measure non-overlapping sections first, or use the driveway tool for a linearly widening main section plus a rectangular apron. Do not treat a bounding rectangle as the cleaned area when it includes exclusions.
Does a US mode supply US market rates?
No. USD/feet formatting and unit conversion do not establish a local price. Enter your own rates and costs.
Sources and evidence limits
- WashTally formula and scenario register v1.0.0
Declared arithmetic and explicitly hypothetical scenarios checked by automated tests. No trade certification or representative market rates.
Record checked: - NIST: international-foot conversion
1 international foot = 0.3048 metre exactly; square-unit conversion is the square of the length factor. This does not convert currency or market prices.
Record checked:
A source record or passing arithmetic test does not establish a universal rate, professional review, property assessment or guaranteed outcome.