An answer in one pass
Enter the measurements you already have and get quantities, coverage, weight or cost figures back in seconds, with sensible defaults and unit switching instead of setup screens.
Portfolio case study
BuildersMeasures is a free online calculator platform for construction, home improvement and project planning: 30+ practical tools that show the result, the method behind it and the guidance to use it. Researched, designed, built and written end to end.
100% free to useNo account or appMobile ready on site
30+ calculators and guides
Every tool published with its formula, inputs and a worked example.
What the project delivers
Most building questions arrive with a tape measure and a deadline. The platform is built around three promises that shaped every page.
Enter the measurements you already have and get quantities, coverage, weight or cost figures back in seconds, with sensible defaults and unit switching instead of setup screens.
Each calculator page shows the inputs it uses, the formula behind the result and a worked example, so anyone can check the maths before ordering materials or booking work.
Lightweight, responsive pages that stay readable on a phone at the site, on a tablet in the truck and on a desktop at the kitchen table, with no app to install.
Featured work
Material quantity, measurement, cost and planning calculators, organised by the job in front of the user rather than by internal taxonomy.
Volume, bags, blocks, bricks, rebar and mortar for slabs, footings and walls.
Concrete volume · Slab · Block · Brick · Rebar · Cement
Open concrete calculator
Roof area, pitch, rise, run, slope and material quantities for coverings and trims.
Roofing · Roof pitch · Slope · Exterior measuring
Open roofing calculator
Paint, plaster, tiles, flooring and wall areas for finishing and remodel work.
Paint · Plaster · Tile · Flooring · Wall area
Open paint calculator
Cooling capacity and airflow estimates checked before equipment is chosen.
AC BTU · Air flow · Volume · Weight
Open BTU calculator
Water volume for pools and aquariums, plus aggregates for driveways and beds.
Pool volume · Aquarium · Gravel · Mulch · ABC stone
Open pool volume calculator
Project cost estimates, mortgage payments and loan repayment figures in one place.
Cost estimator · ADU cost · Mortgage · Advanced loan
Open cost estimator
More than a number
Each calculator carries its own explanation, formula and example. These are real results from the published tools.
Depth can be entered in millimetres or inches, and the 5 to 10% allowance for spillage and uneven bases is noted on the tool page.
Turn plan dimensions into the volume you order, before wastage.
Open the calculator
Roofing material is ordered from sloped area, not the footprint of the building, so the pitch factor is applied before coverage is calculated.
Understand the roof before estimating the covering.
Open the calculator
Door and window openings are subtracted from the wall area first, then coverage per coat is applied, so the estimate matches how paint is actually bought.
Buy the right number of tins the first time.
Open the calculator
Approach
The same method was applied from the first concrete calculator to the newest finance tool, which keeps the platform predictable to use and quick to extend.
Each tool begins with a question people actually search for: how much concrete, how many tiles, what will it cost. Scope comes from the job, not from the software.
Fewest possible inputs, sensible defaults, clear units and an instant result. Nothing is asked for that the user cannot measure on site.
Every page documents its formula, its assumptions and a worked example, published openly in a dedicated method section of the site.
No account, no app, no paywall. Lightweight pages that load quickly on a phone with a weak signal at the edge of a site.
Content system
Tools alone leave people guessing. Alongside them sits a guide library covering measurement methods, worked examples and how-to articles, plus a published calculation policy for the whole platform.
Construction guides and how-to articles written for practical site useA "How We Calculate" page documenting formulas, rounding and assumptionsPer-page examples that show how inputs become a resultCategory hubs for exterior measuring, masonry measuring and interior work
"The goal is simple: help you turn a practical question into a result you can use, with fewer steps along the way."
From the BuildersMeasures about page
About the maker
BuildersMeasures was created for people who need a useful calculation without unnecessary friction: builders, homeowners, renovators, students, DIYers and project planners working through measurement, quantity, cost and planning questions.
Everything on the platform, from the calculator logic and the interface design to the guides, examples and published formulas, was researched and built as an independent project rather than a corporate product, which is why the tools stay free and the method stays visible.
Independently builtConcept, design, build and content by one maker
Continually expandingNew calculators added from reader suggestions
Method publishedFormulas and assumptions documented in public
Open to feedbackMissing a tool? Suggestions are welcome
Common questions
Yes. The platform is built around free online calculators and practical tools. No paid subscription is required to use them.
No. The calculators run directly in the browser, with no account, download or installation step in the way.
The tools return practical estimates based on the values and formulas shown on each calculator page. Measurements, material specifications, local requirements and site conditions should still be checked before ordering materials or making project decisions.
Start with the job in front of you. Pick the calculator for the material, measurement, cost or project type closest to your question, then follow the inputs and examples on the tool page.
Yes to both. The layouts are responsive for phones, tablets and desktops, and the contact page is the place to suggest a calculator, report a problem or share feedback.
See it live
Thirty-plus free tools, worked examples and guides, all open in the browser with nothing to install. Pick the calculator that matches your question and get an answer you can use.
Free to use · No sign-up · Opens in a new tab
