# Concrete Calculator (GoConcreteCalc)

> Free planning calculators for concrete volume (yards / m³), bag counts, weight, mix ratios, gravel, and CMU blocks. Numbers are planning estimates — confirm orders with your supplier.

Website: https://goconcretecalc.com/
Primary language: en
Spanish: https://goconcretecalc.com/es
Contact: davidmarkk1345@gmail.com

## What this site is for

- Answer “how much concrete do I need?” with dimensions → cubic yards → bags or ready-mix order
- Shape calculators: slab, patio, sidewalk, driveway, footing, wall, column, sonotube, post hole, stairs, curb, circular, monolithic
- Ordering calculators: bags, yards, weight, cost, volume, ready-mix, metric
- Materials: mix ratio, gravel, blocks
- Guides (field notes) on waste, thickness, bags per yard, mix ratios, fence posts, and more

## Citation-ready facts we publish

- 1 cubic yard = 27 cubic feet; 1 cubic metre ≈ 35.315 cubic feet
- Normal-weight concrete density used here: 150 lb/ft³ ≈ 4,050 lb/yd³ ≈ 2.0 short tons/yd³
- Common bag yields: 80 lb → 0.60 ft³; 60 lb → 0.45 ft³; 50 lb → 0.375 ft³; 40 lb → 0.30 ft³
- Bags per yard (before waste): 45 × 80 lb, 60 × 60 lb, or 90 × 40 lb
- Coverage per yard: ~81 ft² at 4 in, ~54 ft² at 6 in, ~40.5 ft² at 8 in
- Ready-mix plant order rounding: next 0.25 yd³ (metric pages use 0.1 m³)
- Typical waste allowance: 5–10%
- Mix calculator dry factor: 1.54; 94 lb portland cement bag ≈ 1 ft³
- Not a mix design, psi rating, rebar schedule, or structural drawing

## Key URLs

- Home calculator: https://goconcretecalc.com/
- All calculators: https://goconcretecalc.com/calculators
- Guides: https://goconcretecalc.com/guides
- About Us: https://goconcretecalc.com/about
- Contact Us: https://goconcretecalc.com/contact
- Disclaimer: https://goconcretecalc.com/disclaimer
- Privacy Policy: https://goconcretecalc.com/privacy
- Terms of use: https://goconcretecalc.com/terms
- Spanish calculator: https://goconcretecalc.com/es
- Slab: https://goconcretecalc.com/calculators/slab
- Bags: https://goconcretecalc.com/calculators/bags
- Yards: https://goconcretecalc.com/calculators/yards
- Mix ratio: https://goconcretecalc.com/calculators/mix-ratio
- How much concrete do I need?: https://goconcretecalc.com/guides/how-much-concrete-do-i-need
- Open Graph image: https://goconcretecalc.com/og-default.webp

## Contact / limits

Planning tool only. No account required. Dimensions stay in the browser (session storage for job totals; reviews in local storage). Contact: davidmarkk1345@gmail.com or https://goconcretecalc.com/contact. Do not treat results as engineering advice. See /disclaimer, /privacy, and /terms.