Concrete Calculator for a 10×10 Shed Slab
A 10×10 foot concrete slab is the gold standard foundation for backyard storage sheds, hot tubs, and small outdoor workshops. Standard code recommends a 4-inch depth for general storage and 6 inches for heavy equipment or ride-on mowers.
Instant Concrete Estimator
Real-time cubic yards, 80lb/60lb bags, ready-mix truckloads & 1:2:3 site batch ratios.
Option A: Pre-Mixed Concrete Bags (Rounded Up to Whole Bags)
Yields 0.60 cu ft / bag (rounded up to whole bags)
Yields 0.45 cu ft / bag (rounded up to whole bags)
~188 quarts (~3 qts per 80 lb bag)
A standard half-ton pickup bed maxes out at 1,500 to 2,000 lbs (0.75 to 1.0 ton). This bag order weighs 5,427 lbs and requires 4 pickup trips or a flatbed delivery truck.
* Payload Safety Notice: General physics estimate only. Payload ratings vary by vehicle trim and options. Check your specific driver-door tire and loading placard (GVWR) before hauling aggregate or bagged concrete.
Disclaimer: Calculations provided are estimates for preliminary material planning only. Actual yields vary based on subgrade compaction, site grading, waste, and local trade practices. QuickRenoTools assumes no liability for material shortages, structural failures, code non-compliance, vehicle overloads, or jobsite injuries. Verify all structural spans, retaining wall heights, and concrete mix designs with a licensed engineer, certified contractor, or local building authority prior to purchase and construction. Legal Disclaimer→
Concrete Calculator for a 10×10 Shed Slab — Quick Reference
Exact material counts across standard depths and load ratings.
| Slab Depth & Rating | Volume (Cu Yds / +10% Waste) | 80 lb Bags (US) | 60 lb Bags (US) | Recommended Application |
|---|---|---|---|---|
| 4 inches (Standard Shed) | 1.23 cu yds (1.36 w/ 10% waste) | 56 net (62 w/ waste) | 74 net (82 w/ waste) | Best for standard garden sheds up to 1,500 lbs. |
| 5 inches (Medium Duty) | 1.54 cu yds (1.70 w/ 10% waste) | 70 net (77 w/ waste) | 93 net (102 w/ waste) | Ideal for riding mowers, tool chests, and heavy workbenches. |
| 6 inches (Heavy Duty) | 1.85 cu yds (2.04 w/ 10% waste) | 84 net (92 w/ waste) | 112 net (122 w/ waste) | Required for hot tubs, gun safes, or small vehicle parking. |
Disclaimer: Calculations provided are estimates for preliminary material planning only. Actual yields vary based on subgrade compaction, site grading, waste, and local trade practices. QuickRenoTools assumes no liability for material shortages, structural failures, code non-compliance, vehicle overloads, or jobsite injuries. Verify all structural spans, retaining wall heights, and concrete mix designs with a licensed engineer, certified contractor, or local building authority prior to purchase and construction.
Related Tools for This Project
Building this project? Don't forget your sub-base gravel, reinforcement steel, or finishing supplies:
Step 1: Sub-Base — Every 10×10 concrete slab requires a compacted 4" crushed stone base for drainage.
Step 2: Reinforcement — Calculate #3 (3/8") rebar grid at 18" spacing to prevent slab cracking.
Step 3: Perimeter Walls — Building a raised CMU block curb or stem wall on top of your shed slab?
Project Guide: Concrete Calculator for a 10×10 Shed Slab
When building a project of this scale, precision in your prep work directly impacts durability. Ensure you excavate below the topsoil layer down to undisturbed subsoil, and always install compacted aggregate base with edge forms braced at minimum 2-foot intervals.
Frequently Asked Questions: Concrete Calculator for a 10×10 Shed Slab
Common questions about bag calculations, ordering bulk vs bags, and trade standards.
Is it cheaper to buy bags or order a concrete truck for a 10x10 slab?
A 10x10 slab requires ~1.36 cubic yards. Ready-mix trucks usually require a 3 to 4-yard minimum order and charge a $100–$250 short-load fee, making a truck cost $450–$650. Buying 62 bags of 80 lb concrete at Home Depot or Lowe's costs around $350–$420. Bags are cheaper, but mixing 5,000 lbs by hand requires renting an electric mixer.
Should I pour 4 inches or 6 inches for a shed foundation?
A 4-inch slab with rebar or wire mesh is sufficient for 90% of prefabricated sheds (resin, wood, or metal). Step up to 6 inches if the shed will house a riding lawn mower, heavy machinery, or a cast iron table saw.
What gravel base is required under a 10x10 slab?
Install 4 inches of compacted #57 crushed stone or crusher run (road base) over geotextile fabric. A solid gravel base prevents frost heaving, provides drainage, and stops ground moisture from seeping into the slab.
Do I need rebar in a 10x10 shed slab?
Yes. Install #3 (3/8") or #4 (1/2") rebar tied in an 18-inch on-center grid, elevated on 2-inch plastic chairs. Rebar prevents structural cracking when the ground expands and contracts during winter.
How long before I can build the shed on the new slab?
You can walk on the slab after 24 to 48 hours to remove form boards. However, you should wait at least 7 days before anchoring shed walls and storing heavy equipment, allowing the concrete to reach ~70% of its ultimate strength.
Does a 10x10 concrete slab require a permit?
In most jurisdictions, detached accessory structures under 120 square feet do not require a building permit. However, always check local zoning setback rules (typically 3 to 5 feet from property boundary lines).
How do I cure a 10x10 concrete slab properly?
Keep the slab moist for the first 5 to 7 days by misting it with a hose twice daily and covering it with plastic sheeting, or spray a curing compound immediately after the broom finish is applied. Proper hydration prevents surface crazing and spiderweb cracks.
What slope should a shed slab have?
A shed floor slab should be poured completely level. If you have an outdoor apron or ramp leading up to the shed door, slope that ramp 1/4-inch per linear foot away from the shed entrance.