Concrete Calculators
Estimate volume, cubic yards, bags, weight and cost for any concrete pour — then see exactly which mixing and batching equipment fits your project, from a single slab to continuous production.
Which calculator do you need?
Every tool shares the same core volume math but is tuned for a specific job — different default shapes, outputs and guidance. Match what you're estimating to the calculator built for it:
- You know the shape and dimensions and just want a number for any pour. Concrete Calculator →
- You're pouring a floor, pad or slab and want bags, weight and cost together. Concrete Slab Calculator →
- You're sizing strip or pad footings for a wall, fence or foundation. Concrete Footing Calculator →
- You're planning a driveway and need volume plus a realistic budget. Concrete Driveway Calculator →
- You're buying bagged concrete and need to know how many bags to load. Concrete Bag Calculator →
- You're ordering from a ready-mix supplier and think in cubic yards. Concrete Yard Calculator →
- You want to compare ready-mix delivery against batching on site. Concrete Cost Calculator →
- You're batching your own mix and need cement, sand, aggregate and water by ratio. Concrete Mix Ratio Calculator →
How our concrete calculators work
The math behind every result
Concrete volume is the space your pour fills. Each calculator converts your dimensions to metres, multiplies them for the chosen shape, multiplies by quantity, then adds your waste allowance:
- Slab, footing or wall: length × width × thickness.
- Round column or post hole: π × (diameter ÷ 2)² × depth.
- Cubic metres convert to cubic yards (× 1.308) and cubic feet (× 35.31).
- Weight uses a normal-concrete density of 2,400 kg/m³ (≈ 4,050 lb/yd³).
What you can rely on
- Imperial or metric — enter feet/inches or metres/millimetres and switch units anytime.
- Bag counts for 40, 60 and 80 lb (and metric) bags, based on real yield per bag.
- Cost estimates from your own price per yard or per cubic metre.
- Equipment guidance linking your volume to the right mixer or plant.
- Private and free — everything runs in your browser; nothing is sent or stored.
What produces this much concrete?
An estimate is only useful if you can produce it. As a concrete-equipment manufacturer, we map every volume range to the machinery that pours it economically — so the number from a calculator points straight to the right mixer or batching plant.
Small pour — mix on site
Under ~0.5 m³ (≈0.65 yd³) you can mix on site from bags. A portable mixer saves time over hand-mixing once you pass a few bags.
Medium pour — small mixer or ready-mix
From ~0.5–2 m³, a small or self-loading mixer keeps you independent of delivery schedules; otherwise order ready-mix.
Large pour — self-loading mixer or delivery
At 2–10 m³, compare ready-mix delivery against a self-loading mixer or mixer truck if you pour regularly.
On-site batching becomes economical
Above ~10 m³, repeated or remote pours usually cost less with on-site batching than per-load delivery. A mobile or compact plant sets up fast.
Continuous production — dedicated plant
Beyond ~50 m³ per job, a stationary or ready-mix plant delivers the throughput and consistency large projects need.
Frequently asked questions
Which concrete calculator should I use?
Start with the Concrete Calculator if you just need a volume for a known shape. Use the Slab, Footing or Driveway calculators when you want results tailored to that element (including bags, weight and cost), the Bag or Yard calculators when you're buying bagged or ready-mix concrete, the Cost Calculator to budget a pour, and the Mix Ratio Calculator when you're batching your own mix.
Do the calculators work in both metric and imperial units?
Yes. Every calculator lets you enter dimensions in feet/inches or metres/millimetres and returns results in cubic yards, cubic metres, cubic feet, bags, weight and cost. You can switch unit systems at any time without re-entering values.
How accurate are the estimates, and how much waste should I add?
The math is exact for the shapes and densities used, but real pours vary with subgrade, formwork and spillage. Add 5–10% waste — closer to 10% for small or irregular pours — so you don't run short mid-pour. Always confirm volumes and mix designs with your supplier or engineer before ordering.
How many bags of concrete are in a cubic yard?
A cubic yard is about 0.765 m³. An 80 lb (36 kg) bag yields roughly 0.6 ft³, so a cubic yard needs about 45 bags; a 60 lb bag yields about 0.45 ft³, so you'd need about 60. The Bag and Yard calculators do this conversion for your exact volume and bag size.
Are the calculators free, and do I need to sign up?
All calculators are completely free, run entirely in your browser, and need no sign-up or account. Nothing you enter is sent anywhere or stored.
Can Xingye supply the equipment to produce this much concrete?
Yes — that's our core business. Each calculator maps your estimated volume to the right equipment, from portable and self-loading mixers for small pours to compact and stationary batching plants for continuous production. Use the volume guide on this page or request a quote to match a machine to your output.
Know your volume? Let's match the equipment.
Tell us your typical pour size and output, and we'll recommend the mixer or batching plant that fits — with pricing, lead time and shipping to your site.