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Free Decorator Business Calculators
Use our free decorating calculators to estimate paint quantities, calculate labour costs, check your day rate and protect your profit. Created specifically for UK painters and decorators.
Paint Coverage Calculator
Estimate how much paint you need for walls, ceilings and woodwork.
Use CalculatorDecorating Job Price Calculator
Build a decorating job price room by room with labour, materials and markup.
Use CalculatorDecorator Day-Rate Calculator
Calculate the minimum day rate needed to hit your income target.
Use CalculatorMarkup and Profit Margin Calculator
Add markup to your costs or work backwards from a desired profit margin.
Use CalculatorFree decorator calculators built for the trade
Trade Assist provides four free online calculators designed specifically for UK painters and decorators. Whether you are estimating paint quantities, working out a job price, calculating your day rate or checking your profit margin, these tools help you quote with confidence. No login is required — you can use them straight away and transfer the results into a full quote when you are ready.
Paint coverage calculator
The paint coverage calculator estimates how many litres of paint you need for walls, ceilings and woodwork. Enter your room dimensions, number of coats and the coverage rate from the tin, and the calculator works out the total paintable area, the litres required and the recommended number of tins. Standard door and window openings are deducted automatically, and you can add a wastage allowance for a realistic buffer.
Decorating job price calculator
The job price calculator lets you build a decorating quote room by room. Add labour time, materials, expenses, markup and VAT, and the calculator produces a live breakdown of costs, a suggested customer price and an estimated profit margin. You can add multiple rooms, each with different work types, and see the total job value update instantly. When you are happy with the numbers, transfer the results to the full quote builder with a free account.
Painter and decorator day rate calculator
The day rate calculator helps self-employed decorators work out the minimum daily charge needed to meet their income target. Enter your desired income, overheads and working pattern, and the calculator produces a break-even day rate and a suggested day rate that includes your desired profit. This is the essential first step before quoting — if you do not know your break-even rate, you are guessing at your prices.
Markup and profit margin calculator
Many decorators confuse markup and margin, which leads to underpricing. The markup and profit margin calculator has two modes: add a markup to your costs to find a selling price, or work backwards from a desired margin to find the price you need to charge. Understanding the difference between markup and margin is one of the most important skills for a profitable decorating business.
From calculation to professional quote
The free calculators give you instant numbers, but to send a professional, branded quote to your customer you need the full quote builder. Create a free Trade Assist account and you can transfer your calculator results directly into a quote, add your logo and business details, and send the quote to your customer via a client portal for digital approval. The quote builder also calculates paint quantities and labour costs automatically, so you can create a complete quote in minutes.
Ready to turn your calculations into professional quotes? Create a free Trade Assist account and use the full quote builder.
Want to turn calculations into professional quotes?
Trade Assist includes a full quote builder, invoicing and job management — built for decorators.