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Concrete Calculator
Concrete Calculator — Free concrete estimator: cubic yards/bags/cost for six shapes with US or metric units—no account.
About Concrete Calculator
Concrete Calculator estimates finished concrete volume, whole bags, and optional material costs for slabs, footings, walls, columns, hollow cylinders, stairs, and ramps. Supports reserve, QUIKRETE presets or custom yield, and ready-mix order increments. Geometry and material estimates only—not structural design.
- Who it is for
- Homeowners, contractors, and DIYers who need finished concrete volume, bag counts, and optional material cost estimates—no account required.
- Problem it solves
- Estimating finished concrete volume, whole bags, and material costs for slabs, footings, walls, columns, hollow cylinders, stairs, and ramps is easy to get wrong by hand, especially when switching units or adding reserve and ready-mix increments.
- The solution
- It estimates finished concrete volume, whole bags, and optional material costs for those shapes. Supports reserve, QUIKRETE presets or custom yield, ready-mix order increments, and US or metric units, with no account required.
- What makes it unique
- It is fully free, needs no account, and covers six shapes with US or metric units, bag presets, and ready-mix increments. Geometry and material estimates only—not structural design.
Features
Six geometric shapes
Ramp input by end thicknesses or slope angle, with percent grade
Interactive 3D shape preview with rotation and zoom
US and metric units
Multiple areas
Reserve allowance
Details
- Platforms
- Web
- Pricing
- Free
- Built for
Homeowners, contractors, and DIYers who need finished concrete volume, bag counts, and optional material cost estimates—no account required.
- Building since
2026
Technology
Concrete Calculator screenshot showing a concrete calculator page
1 / 2Website performance
Recorded mobile lab measurements and finalized weekly standings from IndieTools Speed.
Concrete Calculator website speed overview
91
Performance scoreGood
In IndieTools' mobile lab test on November 11, 2026, the Concrete Calculator website scored 91 out of 100 (good). Largest Contentful Paint took 2.32 s, rated good.
Measured (UTC)
- LCPLargest Contentful Paint
- 2.32 s
- Good
- TBTTotal Blocking Time
- 184 ms
- Good
- CLSCumulative Layout Shift
- 0.000
- Good
- FCPFirst Contentful Paint
- 2.32 s
- Needs improvement
Not ranked in a finalized week yet.
Concrete Calculator lab metrics
| Metric | Result | Status | Trend |
|---|---|---|---|
| Mobile lab testMid-range phone on a throttled 4G connection, two runs averaged. Changes compare with the run on Nov 11. | |||
| Performance score GoodDown 6 points | 91 / 100 | GoodDown 6 points | |
| First Contentful Paint Needs improvement1.35 s slower | 2.32 s | Needs improvement1.35 s slower | |
| Largest Contentful Paint Good1.35 s slower | 2.32 s | Good1.35 s slower | |
| Speed Index Needs improvement2.00 s slower | 4.39 s | Needs improvement2.00 s slower | |
| Total Blocking Time GoodAbout the same | 184 ms | GoodAbout the same | |
| Cumulative Layout Shift GoodAbout the same | 0.000 | GoodAbout the same | |
| Unthrottled observationsTimed on the test machine's own fast connection, so they read lower than the lab metrics above. | |||
| Page load 311 ms faster | 669 ms | 311 ms faster | |
| Server response About the same | 4 ms | About the same | |
Concrete Calculator performance history
2 comparable mobile lab runs since November 11, 2026. Choose a metric and a range, then move along the line to read each run.
Concrete Calculator Speed ranking
Not ranked yet. Ranks appear once a week with this product is finalized.
Stored lab observations from controlled test runs, not real-user Core Web Vitals or a guarantee of search rankings. Weekly standings remain attached to their finalized edition.Method psi-mobile-two-sample-mean-v1, 2 samples per reading. Lab results can vary between runs.
Domain Rating
Domain Rating by Ahrefs- DR4 (primary model)
- 6
First DR4 reading
- DR3
- 17
First DR3 reading
Model difference−11. DR4 is 11 points lower than DR3.
Measured · concrete-calculator.me
What do DR4, DR3 and the model difference mean?
- DR4:
- Ahrefs' newer model. It gives more weight to links from sites with organic search traffic and rates a subdomain on its own links.
- DR3:
- The previous model, shown in the Ahrefs app until 1 December 2026.
- Model difference:
- DR4 minus DR3 for the same domain. The models calculate differently, so this is not growth or a drop; the “since” lines compare each model with itself.
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