Concrete Patio Calculator
Estimate cubic yards, bags, and cost for your patio pour
Length of the patio slab
Width of the patio slab
Standard patio: 4"
Concrete Volume
—
cubic yards
Cubic Meters
—
m³
80 lb Bags
—
bags
Estimated Cost
—
USD
Disclaimer: Results are estimates based on standard formulas. Not a substitute for professional advice from a licensed contractor, engineer, or architect. Verify all calculations before making purchasing or construction decisions.
How to Use This Calculator
Pouring a concrete patio? Knowing your exact concrete volume prevents short loads and costly re-deliveries. Our calculator converts patio dimensions into cubic yards, bags, and estimated cost.
- Measure the length and width of your patio in feet
- Set the slab thickness (4" is standard for patios)
- Review cubic yards, cubic meters, and 80 lb bag counts
- Use the cost estimate to budget materials and delivery
Expert Insights
Smart analysis for your Concrete Patio project
Thickness Guidance
A 4" slab suits foot traffic and patio furniture. Move up to 5-6" if the patio will hold a hot tub, outdoor kitchen, or vehicle access.
Ready-Mix vs. Bagged
For pours over 2-3 cubic yards, ready-mix delivery is usually cheaper and faster than mixing bagged concrete by hand.
Curing Best Practices
Keep the slab moist or covered for at least 7 days. Proper curing can boost final strength by up to 50% compared to air drying.
Calculation Formula
Volume (cu ft) = Length x Width x Thickness / 12
Cubic yards = Volume / 27
Cubic meters = Volume x 0.0283168
80 lb bags = ceil(Volume / 0.6)
Estimated cost = ceil(Cubic yards x $150)
Concrete Patio Finish Comparison
| Finish Type | Cost per sq ft | Slip Resistance | Maintenance | Best For |
|---|---|---|---|---|
| Broom Finish | $6-$10 | High | Low | Standard patios |
| Smooth Trowel | $7-$12 | Low | Low | Modern looks |
| Exposed Aggregate | $9-$15 | High | Medium | Decorative patios |
| Stamped Concrete | $12-$20 | Medium | Medium | Stone/brick look |
Authority References
Our calculations are based on guidelines and standards from these authoritative sources:
- American Concrete Institute (ACI) — ACI 302: Guide for Concrete Floor and Slab Construction. Learn more
- Portland Cement Association (PCA) — Residential Concrete Patios & Walkways. Learn more
- International Residential Code (IRC) — Chapter 4 — Foundations. Learn more
Frequently Asked Questions
How thick should a concrete patio be?
A standard residential concrete patio should be 4 inches thick. For patios that will support heavy furniture, grills, or hot tubs, increase to 5-6 inches.
How much does a concrete patio cost?
A plain concrete patio costs about $6-$16 per square foot installed, or roughly $150 per cubic yard of concrete for materials. Stamped or colored finishes add $5-$12 per square foot.
How many 80 lb bags of concrete make a yard?
It takes about 45 bags of 80 lb premixed concrete to make one cubic yard. Each 80 lb bag yields approximately 0.6 cubic feet.