Free tools for UK tradespeople
Free calculators and templates for the sums and the paperwork that come with the job. Every tool shows its working, says where its figures come from and when they were last checked. No signup and nothing to download. Apart from the business search in the review QR generator, what you type stays in your browser.
This month: radiator BTU calculator, self-employed tax calculator and method statement and RAMS template.
Measuring and materials
The sums you do standing in the job before you can price it. Volumes, tonnes, bricks and boards from measurements, with the waste allowance shown, the order quantity rounded the way the merchant sells it, and the working underneath so you can check it.
Concrete calculator
Slabs, footings, post holes and steps in m³, with bags, site mix and ready-mix order size.
Free, no signup
Brick and block calculator
Bricks, blocks, ties and mortar for any wall, with openings taken off.
Free, no signup
Mortar calculator
Sand, cement and lime for a wall, a brick count or repointing.
Free, no signup
Gravel calculator
Tonnes, bulk bags and 25kg bags for any area, and the whole driveway build-up.
Free, no signup
MOT Type 1 calculator
Tonnes of sub-base for a drive, patio or path, at the compacted depth.
Free, no signup
Decking calculator
Boards by stock length, and the frame as a cutting list, for timber or composite.
Free, no signup
Roof pitch calculator
Pitch in degrees, x:12, percent and 1 in N, rafter lengths, tile minimums and flat roof falls.
Free, no signup
Radiator BTU calculator
Room heat loss in watts and BTU, the radiator size to buy, and heat pump sizing.
Free, no signup
Screed calculator
Sand and cement, liquid screed and levelling compound: bags, bulk bags, depths and drying time.
Free, no signup
Hip roof calculator
Hip and jack rafter lengths, hip pitch, ridge, roof area and tiles, with a live plan view.
Free, no signup
Pricing and quoting
Working out what to charge and putting it in writing. Start from what you need to earn, add the markup that actually leaves a profit, then send a quote that holds up: VAT done properly, stage payments, and the cancellation notice the law requires when you quote at a customer's home.
Day rate calculator
From what you want to take home to the day and hourly rate to charge.
Free, no signup
Markup and margin calculator
Markup to margin, and a job priced from materials, labour and overheads with VAT.
Free, no signup
Builder quote template
Itemised quotes with VAT, stage payments and the homeowner cancellation notice.
Free, no signup
Trade lead cost calculator
Cost per lead and per job won from each lead source, and what your own website would need to do.
Free, no signup
Paperwork and getting paid
The documents the job needs before, during and after. A RAMS the site manager will accept, a job sheet the customer signs on your phone, the interest and letter for an invoice that goes unpaid, and a QR code that turns a happy customer into a review.
Method statement and RAMS template
Word and PDF templates, or build a site-specific RAMS with trade hazards and the 5 by 5 matrix.
Free, no signup
Late payment interest calculator
Statutory interest and the fixed sum on overdue invoices, with a letter to send.
Free, no signup
Google review QR code generator
Your direct Google review link, a QR code, print-ready cards and stickers, and messages for asking.
Free, no signup
Job sheet template
Printable numbered pads, or fill one in on your phone and sign it.
Free, no signup
Tax and VAT
Tax for sole traders and subcontractors, on this year's rates. What you owe and when, what CIS has already taken and what comes back, and whether the VAT flat rate scheme saves you money or costs you it. Every rate carries its source and the date we last checked it.
Self-employed tax calculator
Sole trader, or employed and self-employed: tax, NI and what to put aside.
Free, no signup
CIS tax calculator
The deduction on a payment, what you are paid, net to gross and reverse charge VAT.
Free, no signup
CIS tax rebate calculator
Your year-end CIS refund, with tax, National Insurance, expenses, mileage and Scottish rates.
Free, no signup
VAT flat rate calculator
Flat rate against standard VAT, with the limited cost test and CIS reverse charge.
Free, no signup
Integrations
The same calculators, in the tools your office already has open.
Uses 2026/27 rates. Last checked against gov.uk.
Know the price before you call
Tell us your trade, the towns you cover and what you've got online now. You'll get a fixed price and a timescale in writing.
We reply within one working day.