4 steps, 4 ft wide
- Stair volume
- 21.3888888889 ft3
- Landing volume
- 28 ft3
- 80 lb bags
- 91
This assumes solid concrete steps. Hollow forms, nosing, footings, reinforcement, frost, slope, handrails, and building code need separate planning.
Concrete Steps Calculator
Use this free concrete steps calculator to estimate cubic yards, cubic feet, and 60 lb or 80 lb bag counts from step count, stair width, riser height, tread depth, optional landing depth, and waste.
Inputs explainedResult checksExample valuesRuns in your browser
Formula steps
- Convert riser and tread dimensions to feet.
- Estimate the solid stair shape as stacked rectangular steps.
- Add the landing volume, waste, and common bag counts.
Examples
Recent answers
Recent concrete step estimates will appear here.
Concrete steps estimates stay local and use a simple solid-stair volume model.
Inputs and recent answers stay in this browser tab and are not sent to a server.
How to use the Concrete Steps Calculator
- Enter step count, step width, riser height, tread depth, optional landing depth, and waste percent.
- Press Estimate steps to see solid stair volume, landing volume, cubic yards, and bag counts.
- Use 0 for landing depth if the steps do not include a top landing.
- Forms, reinforcement, footings, frost, slope, handrails, and building code can change the real design.
What people use it for
Estimate concrete for porch or garden steps.
Include a simple top landing in the volume.
Convert step dimensions to cubic yards.
Compare different riser and tread layouts.
Check 60 lb and 80 lb bag counts for small step pours.
Separate concrete quantity from code, formwork, and handrail decisions.
Quick examples
Porch steps
4 steps, 4 ft wide, 7 in riser, 11 in tread, 3 ft landing, 10% waste2.01 yd3, about 91 eighty-pound bags
Garden steps
3 steps, 5 ft wide, 6 in riser, 12 in tread, no landing, 8% waste0.60 yd3, about 27 eighty-pound bags
Landing check
Add a 3 ft top landing to 4 porch stepsLanding volume is included at the full stair height
Riser check
4 steps x 7 in riser28 in total rise before any landing or base details
Need the guide or a nearby tool?
Need a slower walkthrough, a related calculator, or the full library? These links keep you close to the task you started.
- How to use the Concrete Steps CalculatorSee slower examples, input meanings, formula notes, result limits, and mistakes to avoid.
- Home & ProjectsBrowse related calculators and utilities in the same category.
- Calculator and utility guidesFind more guides that use real tool inputs and example numbers.
- All free toolsSearch every live tool, converter, calculator, AI helper, and browser utility.
Frequently asked questions
Plain-language answers about when to use the tool, what it does with your inputs, what to double-check, and how privacy works.
When should I use the Concrete Steps Calculator?
Use it when your task matches one of these common needs: Estimate concrete for porch or garden steps. Include a simple top landing in the volume. It works best when you already know the measurements, amounts, units, or options the page asks for.
What is the Concrete Steps Calculator doing with my inputs?
In plain language: The calculator converts riser height and tread depth from inches to feet, models solid steps as stacked rectangular blocks, adds an optional landing block at the full stair height, applies waste, converts cubic feet to cubic yards by dividing by 27, and rounds 60 lb and 80 lb bag counts up. The examples on the page are there so you can compare your inputs with a worked example before copying the answer.
What do the main Concrete Steps Calculator inputs mean?
Step count: the number of risers in the solid stair shape. Step width: the side-to-side width of the stair in feet. Riser height: the vertical height of one step in inches, not total stair height. Tread depth: the front-to-back run of one tread in inches. Landing depth: optional top landing depth in feet; enter 0 if there is no landing. Waste percent: extra concrete for form variation, spillage, low spots, and a small cushion.
How should I read the Concrete Steps Calculator answer?
Read the headline estimate first, then check the material, waste, coverage, and unit lines. For project tools, the supporting lines are often the difference between a rough idea and a list you can actually shop from.
What should I double-check before trusting the answer?
This assumes solid poured concrete steps. Hollow forms, precast steps, footings, reinforcement, forms, nosing, frost, slope, landings, handrails, drainage, and local building code can change the real design and material need. Also check the unit, scale, mode, and result limit because small input changes can change the answer.
How do I calculate concrete for steps?
For solid steps, estimate each step as a rectangular block, stack those blocks, add any landing, then add waste and divide cubic feet by 27 for cubic yards. This calculator does those steps for you.
Why does the calculator use stacked steps?
Solid concrete stairs can be estimated as stacked rectangular blocks. Each higher step includes the volume below it.
What is riser height?
Riser height is the height of one step. Do not enter total stair height there. Four steps with 7-inch risers have a total rise of 28 inches.
What is tread depth?
Tread depth is the front-to-back walking surface of one step. It is part of the concrete volume and also affects whether the stair layout is comfortable and code-friendly.
How does the landing depth work?
Landing depth adds a top rectangular block. Enter 0 when there is no landing. If the landing sits on another base or is hollow, adjust the estimate instead of trusting the simple block model.
How many bags are in the porch step example?
The 4-step porch example is about 2.01 yd3, or about 91 eighty-pound bags using common dry-mix yield. That is why larger step pours often need ready-mix planning.
Can I use this for hollow formed steps?
Not directly. Hollow or filled forms need a different takeoff because only part of the stair shape is solid concrete.
Does this choose legal stair rise and run?
No. It estimates concrete volume from the dimensions you enter. Stair rise, tread depth, landing size, handrails, and nosing rules are local code and safety questions.
Does this include rebar, mesh, or footings?
No. It only estimates concrete volume and common bag counts. Reinforcement, footings, frost depth, forms, and base prep need separate planning.
Can I use it for precast steps?
Not directly. Precast steps are usually bought as a unit or measured from product data. This page is for simple solid poured-in-place shapes.
Does the site save what I enter?
No. The calculator runs in your browser tab. Your recent answers stay only on the page while you use it, and they are not sent to a server.