Some jobs cannot be priced to the pound before work starts. Hidden damage, old wiring, or rotten timber can change the cost, and a single fixed number sets you up for a dispute. This free builder turns one base price and an uncertainty percent into a low to high range. The customer sees the honest spread, and you keep room to do the job right.
What this tool does
This free quote estimate range builder - low high price range free runs entirely in your browser. Nothing you type is sent to a server, and nothing is stored online. You open the page, enter your numbers, and the result appears at once. You can try again as often as you like, which makes it easy to test different prices before you send a quote. Short checks like this beat guessing, because a small pricing error on one quote can repeat across many jobs before anyone notices it.
How to use it
Start by gathering your real numbers, not round guesses: your actual costs, fees, and rates. Enter them in the tool in order, then press the calculate button and read every result line, not just the total. If a line looks wrong, change one input at a time and re-run the tool, so you can see exactly which input moved the result. Save or copy the final numbers into your quote while they are fresh.
Reading your result
The result lines break the answer into parts, so you can explain each part to a customer in plain words. A total alone rarely convinces anyone, but a total built from visible parts does. If the result surprises you, trust the maths first and check your inputs second: most pricing surprises come from a mistyped number, a forgotten fee, or a percent entered as a whole number instead of a rate.
Worked example
Try a base price of 1200 with 15 percent uncertainty. The low end is 1200 minus 15 percent, which is 1020. The high end is 1200 plus 15 percent, which is 1380. So the quote reads 1020 to 1380. The range width is 360. A narrow range suits simple jobs, while a wide range suits jobs where you cannot see the full problem yet.
Why this matters for a small business
Ranges are honest pricing. They protect the customer from a padded single price, and they protect you from absorbing every surprise for free. A range also starts a better talk: the customer can ask what pushes the price to the high end, and you can explain the risks in plain words. Over time, tracking how often jobs land inside the range sharpens your uncertainty guesses a lot.
Pricing tips
Add a one-line note to every ranged quote naming the main unknown, such as what sits behind a wall or under a floor. Keep the uncertainty percent modest for work you know well, and larger only for work with real unknowns. When the job finishes, note the final price against the range, so next time your percent comes from evidence, not habit.
Common questions
Is this tool really free? Yes. It runs in your browser, needs no account, and has no sign-up step. You can use it as often as you like, for as many quotes as you like.
Is the result professional advice? No. It is an estimate to help you price a quote. Tax rules, local rates, and contract terms differ, so check anything that affects a signed agreement with a qualified adviser before you commit.
Who is it made for? Small business owners, tradespeople, freelancers, and contractors who price their own work and want clear numbers before they talk to a customer.
Spanish version: Generador de Rangos de Precio en Presupuestos para Clientes - Precio MÃnimo y Máximo