Why Calco calculates deterministically (and doesn't guess)

Writing a number is not the same as calculating it

A generic language tool is built to produce text that sounds right. It is good at language and terrible at numbers. Ask it for a price and it finds an amount that looks plausible in context - not an amount that is correct for your job, your purchase prices and your margin. It is a guess dressed up as an answer.

Calco does not write the price. Calco calculates it. Every line is a calculation: quantity times unit price, materials plus labour, with the add-ons and deductions that belong to it. The same job and the same numbers give the same result every time. That is what deterministic means: no guess, no randomness, no day where the number just came out a little different.

Built on your numbers, not an average

A guess pulls its number from a cloud of averages. But you do not buy at average. You have your own agreements with your wholesalers, and those agreements are often the difference between a job that makes money and one that does not.

Calco calculates on what actually applies to you:

• Your own wholesaler net prices, not list price and not a market average
• Quantities per the manufacturer's data sheet - metres, litres and m² as the specification actually requires
• Trade norms and authorisation requirements for the work, so the quote holds up both professionally and legally
• Your margin, applied deliberately and visibly, not baked into a round number

The result is not a ballpark figure. It is your number, calculated on your basis.

You can see where every number comes from

A guess cannot show its work, because there is no work to show - only an output. You cannot stand behind that in front of a customer, and you certainly cannot correct it with confidence if it is off.

In Calco you can open any line and follow it to the bottom: which item, which net price, which quantity under which norm, which add-on. The calculation is there. That makes the quote verifiable - you can check it, not just believe it. And when the maths is verifiable, it is flawless in a way a guess never can be.

Why guessing costs money

A wrong number goes the wrong way no matter the direction. If the guess sets the price too low, you pay the difference out of your own margin on every single job. If it sets it too high, you lose the job to someone who calculated it right. Both cost - every week, quietly.

And there is a cost beyond the kroner: credibility. Send a quote you cannot explain, and when the customer asks about a line, you are left with a number you cannot defend. A quote you can stand behind, line by line, is not just more accurate. It is more convincing.

September 2026: a built-in maths auditor rechecks every quote

The principle is now enforced by code as well. Calco automatically rechecks every calculation in the quote's lines before you send. If a line says "36 m / 0.65 m per bracket = 55 pcs (rounded up)", Calco spots that the correct answer is 56 - and shows a warning with a one-tap fix for the quantity. Fractional quantities of countable goods are caught too: you can't buy 2.5 plasterboards, so Calco suggests 3.

The auditor never changes anything silently. You see the calculation, the correct result, and decide for yourself - exactly like the rest of the quote.

Calco makes the draft. The judgement is yours

Deterministic maths does not mean the machine decides. Calco delivers a fully calculated draft on your basis - fast, consistent and transparent. But the professional judgement is yours: you know the specific job, the awkward angles, the extras that need to go in. You read the draft, correct what you know better, and send it when it is right.

That is the division of labour: Calco takes the heavy, repetitive calculation work off the table so you can spend your time on the craft. A language tool writes nice text. Calco calculates it right - and lets you have the final word.

That is why we calculate deterministically and do not guess. A quote is not text that should sound right. It is numbers that must be right.