About CalculateVolume.org
CalculateVolume.org does one thing: volume. Every shape, every tank, every material, every unit — calculated correctly, with the formula shown, for free.
Why a site about only volume?
Most calculator sites cover thousands of topics an inch deep. When we needed to answer real volume questions — how many gallons a half-filled horizontal tank holds, how many bags of concrete a sonotube takes, what board volume suits a 180-lb intermediate surfer — the top results were either one cramped mega-page or a generic tool with no context for the actual job.
So we built the opposite: a site 100% dedicated to volume calculation, where each question gets its own purpose-built calculator with the right units, reference tables and guidance for that specific task. A student calculating a cone for homework and a contractor ordering ready-mix have different needs; they get different pages.
How we keep the math honest
- Every calculator shows its work. The formula appears on the page with your numbers substituted into it. Nothing is a black box — you can check us with a pencil.
- Every formula is verified against standard geometric, engineering or clinical references before it ships, and every calculator is tested against known worked examples (a cylinder with r = 3 and h = 5 must return 141.37 cubic units, every time).
- Medical calculators cite their sources. Pages like the prostate and tidal volume calculators use published clinical formulas, name them, cite the literature they come from, and carry clear disclaimers. They are educational tools, not diagnostic devices.
- Dates and corrections are public. Every page shows when it was last updated, and our editorial & accuracy policy explains how errors get fixed when readers report them.
How the site is built
The whole site is hand-written HTML, CSS and JavaScript: no frameworks, no sign-ups, no paywalls. We use Google Analytics and Microsoft Clarity to see which pages help people, and our privacy policy explains both. Calculations run entirely in your browser, and we never send or store the numbers you enter. That is also why pages load fast on a phone with a weak signal, which matters when you're standing in a supply yard trying to figure out how many yards of gravel to order.
Contact
Found an error, or a volume question we don't cover yet? Tell us — accuracy reports get priority, and reader requests genuinely shape which calculators we build next.