About JusTheTool

📝 Muhammad Ahmad | 🔄 Last reviewed: August 5, 2026

Muhammad Ahmad — founder

I build things I want to be useful. JusTheTool is free construction calculators, with every formula traced to a published source.

Reach me directly:

JusTheTool is an independent site offering free construction and home-improvement calculators. There is no sign-up, no paywall, and no video you have to sit through to get a number. The site is funded by advertising.

My name is Muhammad Ahmad, and I run this site. I am not a contractor, a carpenter, or a licensed engineer, and I am not going to pretend otherwise — you will not find an invented trade credential anywhere on this site. I build things because I like building something useful for people, and construction estimating struck me as a subject where the arithmetic is simple, the reference numbers are public, and almost nobody shows you either.

So the value I can honestly offer is not personal job-site anecdotes — it is transparency about where every number comes from. Every formula here is drawn from a published, checkable source, and I name that source rather than asking you to trust an assertion of expertise. I use AI tooling to help build and write the site, and I check the figures against the codes and spec sheets they come from. If something is wrong, it is my name on it and I want to hear about it.

                🛠️ Our core promise:
                We will always tell you where a number came from. If a figure is a code requirement, we cite the code section. If it is a manufacturer yield, we name the product. If it is a rule-of-thumb estimate, we say so plainly instead of dressing it up as precision.
            

Where our numbers come from

Every cost figure and technical constant on this site comes from a specific, repeatable source:

Code requirements (stair rise/run, baluster spacing, attic ventilation ratios, frost depth): taken from the International Residential Code (IRC) and cited by section number on the relevant page. Codes are amended locally — your jurisdiction governs, not us.
Material yields and coverage rates (concrete bag yields, paint spread rates, insulation R-values, epoxy pour depths): taken from current manufacturer datasheets and spec sheets. We name the product where the figure is brand-specific.
Material prices: national-average retail pricing from major home-improvement retailers at the time of writing. Regional variation is significant and these figures go stale.
Labor costs: typical national-average professional installation rates by trade. Your local market will vary, sometimes by a wide margin.
Waste factors: standard industry allowances for the material and installation pattern in question, stated on each page so you can adjust them.
Multi-year cost comparisons: built from line-item assumptions printed directly on that page. You can check the arithmetic rather than take our word for it.

                ⚠️ What this data is — and isn't:
                Every number on JusTheTool is a planning estimate to help you budget and compare options. It is not a quote, not an engineering calculation, and not a substitute for a licensed professional. Structural work — beams, trusses, load paths, footings carrying load — needs a licensed engineer or your building department, not a web page. Local codes, prices, and labor rates vary and change.
            

Why "JusTheTool"?

Most home-improvement sites bury a one-line answer under a 1,200-word preamble, three pop-ups, and an email capture. When you are standing in an aisle with a loaded cart, you need the number. So the calculator sits at the top of every page, the explanation sits below it, and nothing asks you to register.

How we handle corrections

Calculators have bugs and reference figures go out of date. Manufacturers change coverage rates; code cycles update. Every page carries a "last reviewed" date so you can judge how current it is.

If you spot a number that is wrong, outdated, or doesn't match your local pricing, please tell us — corrections get made and the review date gets updated. Reach us through the Contact Page. We would rather be corrected than be confidently wrong.

Advertising and independence

This site runs advertising to stay free. Ads are served by third-party networks; we do not choose the individual advertisers, and no advertiser has any say in what our calculators output or what our guides recommend. We do not take payment for favourable coverage of a product or brand. See our Privacy Policy for how advertising cookies are handled.

Get in touch

Bug reports, corrections, and requests for calculators we don't have yet are all welcome via the Contact Page.

— Muhammad Ahmad