Free business and trade calculators
A growing set of free calculators for the building trade and for any business watching its costs. Work out materials, spot overspend on your bills, and see what hidden costs are adding up. Every one is quick, free and needs no sign up.
Trade and building calculators
Work out the materials for a job, from a single wall to a full list. Built by the team behind Otis, the AI sales agent for builders merchants.
Business bill calculators
See where your business is overpaying. OptiFlow Watch turns these estimates into real, guaranteed savings.
Business cost calculators
Put a number on the hidden costs most businesses never add up, then do something about them.
From a calculator to a done job
A calculator gives you a number. Our AI agents do the work. Otis takes a customer question, works out the materials, checks a merchant’s live stock and pricing and takes the order. OptiFlow Watch reads a business’s bills and switches them to save money, with a guarantee. These free tools are a taste of both.
Common questions
Are these calculators free?
Yes, every calculator here is free to use, with no sign up. They give indicative estimates to help you plan and sense check.
How accurate are they?
They use standard figures and sensible assumptions, so they are a reliable starting point. For a firm quote, always confirm with your merchant or supplier.
Can I add one to my own website?
Yes. Our brick calculator is available as a free embed you can paste onto your site. More are on the way.
What is behind these tools?
They are built by OptiFlow Technologies. Our AI agents, Otis for builders merchants and OptiFlow Watch for business bills, do the full version of this work automatically.
See what the full version can do
Book a demo and watch our agents turn these estimates into real orders and real savings.