The ConCal Blog

Estimating · Materials · Business · How-To
1 CY3′ × 3′ × 3′ = 27 CF

The Complete Guide to Estimating Concrete for Slabs, Footings, and Walls

Volume formulas, waste factors, and the ordering mistakes that cost contractors real money, from patio slabs to full foundation bids.

Can You Pour Concrete in the Winter?

Yes, with precautions. What to check before the trucks show up, and the one number that decides when the blankets come off.

500 PSI

How Much Rebar Do I Need for a Concrete Slab?

Count the bars, remember the plus one, then add the laps. The laps are the part that gets skipped.

THE LAP

What Is a Short Load Fee, and How Do You Stop Paying Them?

A truck that leaves half empty costs the plant the same as a full one. Knowing where their line is, and which side of it you are on.

THE MINIMUM

How Much Concrete Do I Need? Formulas, Examples, and a Free Calculator

The core cubic-yard formula, worked examples for slabs, footings, and piers, plus a quick-reference table you can screenshot for the truck.

4″4″ = 0.333 FTSLAB SECTION

Concrete Curing Time: What Contractors Need to Know

The 24-hour/7-day/28-day strength progression, how temperature affects curing, and the pour-day decisions that matter most.

100%1 · 3 · 7 · 28 DAYS

How to Read a Concrete Plan as a Contractor

Scale notation, plan symbols, rebar callouts, and a step-by-step takeoff workflow for pulling quantities from a set of drawings.

08′16′SCALE ¼″ = 1′-0″

How Much Does a Concrete Driveway Cost in 2026?

$6–$12 per square foot is the typical range, but thickness, reinforcement, finish, and site access all move the number.

648 SF$6–$12 / SF

5 Ways to Reduce Concrete Waste on Site

How seasoned contractors keep their waste factor under control without sacrificing quality or rushing the pour.

+10%ORDERED vs POURED

What's New in ConCal: Curve Drawing and Weather Forecasts

Curve-based shapes for round slabs and driveways, plus a built-in weather check for your pour date.

R 14′-0″RADIUS EDGE

How to Price a Concrete Job: Materials, Labor, and Markup

Getting a bid right means more than volume: how to factor in material costs, labor rates, and a fair markup.

MATERIALLABOREQUIPMENTMARKUP4 PARTS OF A BID

Understanding Concrete PSI Ratings: Which Mix Do You Need?

From 2,500 PSI for sidewalks to 5,000+ for structural footings: when to use each rating, and what to tell the plant.

2,500PSI AT 28 DAYS
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