ConCal: Concrete Estimating Tool

Labor Productivity Rates

Crew-hours per unit · Defaults from RSMeans Division 03 residential flatwork. Reopen from Labor rates in the Labor card on the Project page.

Slab Edge Forming LF/crew-hr

Wall Forming SF/crew-hr

Pour & Screed CY/crew-hr

Finish (broom base) SF/crew-hr

Rebar Placement LB/crew-hr

Base / Subgrade SF/crew-hr

Demo / Removal SF/crew-hr

Mesh Placement SF/crew-hr

Cleanup CY/hr added

Advanced: loaded rate, setup time, mobilization, minimums & difficulty

Loaded rate

Payroll burden% on wage

Fixed setup hours (crew-hrs, exist no matter how small the job)

Forming setupcrew-hr

Pour setupcrew-hr

Finish setupcrew-hr

Rebar/mesh setupcrew-hr

Base setupcrew-hr

Demo setupcrew-hr

Getting there and laying out

Time before anyone touches a form. Enter hours for the whole crew together: 2 hours means your crew spends 2 hours on it, not 2 hours each.

Show up, unload, set upDrive time isn't in here: add it if you bill it. hrs

Pull string lines, set gradesThe base amount, before size is considered. hrs

Extra, per cornerA 12-corner layout takes longer than a rectangle. hrs

Extra, per foot of edge0.005 is about 30 seconds a foot. hrs

Haul-off (truck cycles)

Swell factor×

Truck capacityCY/load

Cycle time / loadhr/load

Load broken concreteCY/crew-hr

Floors: the least a job can ever bill

These stop a tiny job from pricing at almost nothing. They are also the main reason a small pad can look expensive, so they are worth setting to your numbers.

Shortest possible pourWhole crew, together. Even one yard needs screed, float, edge, broom. hrs

Shortest possible gradingWhole crew, together. Only when there's base or tear-out. hrs

Smallest job you'll billTotal man-hours: 2 guys for 4 hours is 8. Add up every hand. man-hrs

Smallest job with tear-outSame, for jobs where you rip something out first. man-hrs

Difficulty factors (1.00 = normal)

Access×

Shape complexity×

Weather×

Bar	Diameter (in)	Lap (in, Class B)	Hook 12db (in)	Weight (lb/ft)
#3	0.375	16	4.5	0.376
#4	0.500	25	6.0	0.668
#5	0.625	32	7.5	1.043
#6	0.750	38	9.0	1.502
#7	0.875	56	10.5	2.044
#8	1.000	64	12.0	2.670

Bar	Class A (in)	Class B (in)
#3	13	16
#4	20	25
#5	25	32
#6	30	38
#7	43	56
#8	50	64

Share Proposal

Send a read-only link your client can view in their browser

Saving job to cloud…

ConCal Quick Guide

Three steps to your first bid

Draw it

Click + in the Shapes panel and pick a shape, or Free draw and click each corner.

Check the yards

The top bar shows the yards to Order, with your waste in.

Send the bid

Tap Order · Bid to set your prices, then Documents for the proposal.

More tips

· Drag the canvas to pan · Scroll to zoom
· Double-click a shape tab to rename it
· Pick Lump sum under Labor pricing to lock labor at a flat total
· Add costs the categories miss under Extras on this job
· Save keeps the job; reopen it from Open or the Dashboard

Send to Crew

The job sheet for your foreman's phone: dimensions, yards, mix and your note. No prices.

Loading your team…

Getting Started

Draw your first shape

Tip: right-click any segment to add a curve or split the shape

Set thickness & calculate

Tip: concrete orders round up: add 10% waste to avoid short loads

Run your estimate

Tip: set your concrete $/CY to match your current supplier quote

Estimates Are Tools, Not Guarantees

ConCal is not a licensed engineering tool. Volume calculations do not account for sub-base variation, soil conditions, or local code requirements. All outputs should be verified by a qualified professional before use on permitted projects. You are responsible for confirming quantities with your supplier before ordering.

I understand that estimates are approximate and I will verify all quantities independently. Full terms →

Help & Tutorials

Everything here is written for touch. Tap a section to open it.

Draw a shape ›

Tap + New Shape and pick the type: Slab, Footing, or Wall.
Move the on-screen crosshair to where you want a corner, then tap + Add point.
Repeat for each corner. The sides show live lengths as you go.
To finish: land the crosshair on your first point and add it, or tap Close / Done.

Tip: draw roughly first: you can set exact side lengths afterward (see “Edit a shape”).

Edit a shape ›

Move a corner: drag it.
Open the options bar: press & hold a line or corner. Tap anywhere outside the bar to close it.
Exact length: in the options bar tap Edit length and type the real measurement.
Lock a corner: in the options bar tap Lock to pin it, so editing another side can’t move it. It’ll ask before it ever moves a locked corner.
Delete a segment/corner: options bar → Delete (it confirms if that corner is locked).

Keeping two ends lined up? Lock one corner, then set the opposite side’s length.

Measure & check ›

Pick the Measure tool, then tap two corners to see the true distance between them.
Use it to confirm a driveway is symmetric before you price it.
Zoom: pinch. Pan: drag with two fingers (or use the Navigate tool).

Build the estimate ›

Open the Project tab. The bid is broken out by category: tap any card to open its settings and prices.

Concrete: set thickness, PSI, finish, waste.
Reinforcement: rebar or mesh, and the spacing/size.
Base & subgrade: toggle Base rock on, then set the $/ton: depth & density turn your area into tons automatically.
Demolition / haul-off: turn on if you’re tearing out existing concrete.
Labor: pick a Labor Method: the auto engine, a quick $/SF, or a flat total you type. Set your crew size and rates.

A field left at $0 shows a “Not priced yet” flag: fill it so nothing silently drops out of the bid.

Markup & the bid PDF ›

Set your overhead, contingency and profit in the bid card at the bottom of the Project tab.
Tap Documents for the client proposal: the category totals include your markup, so the numbers add up.
For the crew, the Rebar schedule (in the ··· menu) gives a cut & bend list.

Save & recall jobs ›

Tap Save to store the job.
Open the Dashboard (··· menu) to reopen a saved job later.
Download Backup File (··· menu) saves everything to a file you can keep.

Touch tips ›

Pinch to zoom, two-finger drag to pan.
Press & hold = the right-click menu for a line or corner.
Tap outside any popup/menu to close it.
Rotate to landscape for more drawing room.

Keyboard Shortcuts

Drawing

ClickPlace point

EnterFinish / close shape (footings & walls)

EscapeCancel placing current point

Right-clickSegment options (curve, split, delete)

Edit

CtrlZUndo

CtrlYRedo

DeleteClear / delete active shape

AToggle annotate mode

Canvas & View

SpaceHold to pan (drag canvas)

Middle-clickPan canvas

ScrollZoom in / out

Ctrl0Reset zoom & pan

Shapes

LLock / unlock active shape

ShiftLLock / unlock all shapes

TabCycle to next shape

Precision

ShiftSnap to 45° angles while drawing

AltTemporarily disable grid snap

?Open / close this shortcuts panel

Right-click on…

a shapeRename, duplicate, lock, delete

a segmentSplit, add curve, lock vertex, set exact length

a rebarEdit layout, duplicate row, delete bar, reset

empty canvasBackground plan, calibrate scale

Rebar editor

ClickSelect bar

ShiftclickAdd / remove from selection

ShiftdragBox-select multiple bars

AltdragDuplicate while dragging

ASelect all visible bars

DDelete selected bars

RRotate selection 90°

CtrlCCopy selected

CtrlVPaste

←↑↓→Nudge 1" (Shift = 6", Ctrl = 1')

Your first proposal is ready!

Estimates Are Tools, Not Guarantees