Measure the runs you are actually pricing.
Add each included gutter run once. Use metres with a price per metre, or feet with a price per foot. Guard-work length is a subset of that total; it cannot exceed it.
Select one guard treatment and enter its rate. Downspout work is a separate count-based charge. The calculator does not decide whether a blockage, access condition or property can be worked on safely.
Follow the charge in its actual order.
Base cleaning = gutter length × your base rate. Height adds a percentage of base; debris adds a percentage of the height-adjusted cleaning amount; access adds a percentage of that updated cleaning amount.
Selected guard work, downspouts, customer travel and other customer extras are added afterwards. The minimum applies to that subtotal. Customer adjustments do not multiply these extras. Monetary adjustment rows are rounded to cents before being added.
Keep labour and overhead in the contractor view.
Internal labour uses included on-site, travel and setup hours × workers × your cost per worker-hour. Add the other job-cost total separately. Payment fees are calculated on the customer charge.
The target-margin comparison does not silently rewrite the customer charge. It is a separate check; unentered costs, taxes and uncertain scope still matter.
Use the worksheet with JavaScript off.
The fields remain available as a manual GBP/metres worksheet. Work through the formula and compare it with the fixed example below. Automatic calculation controls are shown only when the browser calculation enhancement loads.
You can use the same arithmetic in USD and feet on paper, provided every rate and measurement uses the matching unit. No currency exchange or local price recommendation is supplied.
Illustrative arithmetic / not market rates
40 metres, two downspouts: an illustrative charge
GBP; £3/m, height25%, debris10%, easy access0%, no guard work; travel£15; minimum£100. Illustrative rates only.
Declared scenario
EXAMPLE ONLY- Base:40 × £3
- £120.00
- Height adjustment
- £30.00
- Debris adjustment
- £15.00
- Two downspouts × £5
- £10.00
- Travel
- £15.00
- Customer charge
- £190.00
With2.5 hours × one worker × £25 and £57 other costs, included costs are £119.50, profit£70.50 and margin37.11%. This reproduces the recorded prototype scenario, not a real job.
Scenario record checked . Read the formula and scenario register.
Review the assumptions
A checklist for this page
- Confirm total length and guard subset.
- State the selected downspout work and any exclusions.
- Enter your own rates and actual cost assumptions.
- Review uncertain scope before issuing your own quote.
Gutter pricing: questions
Do you supply a recommended gutter rate?
No. The live rate field starts empty. The £3/m figure appears only in a labelled arithmetic example.
Are guards multiplied by height and debris?
No. In model 1.0.0 the selected guard charge is added after the cleaning adjustments, together with downspouts and other customer extras.
Can I enter more guard length than gutter length?
No. That would contradict the defined scope, and the browser calculation rejects it.
Is the estimate a cleaning quote from WashTally?
No. WashTally publishes tools; any firm quote is your own decision after reviewing the job.
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.