For iPhone, iPad, Mac and Android
Feet, inches, fractions. And a takeoff you can see.
A construction calculator that types the way you talk: 5′ 3½″ + 2′ 10¾″ just works. Then lay out your walls and slabs and get the studs, the block, the grout and the concrete, in a dimensioned plan and in 3D.
- Feet-inch-fraction math
- Stud, block and concrete takeoffs
- Plan, wall and 3D views
- Free. No ads, no account
The calculator
Type it like you read the tape.
Feet, then inches, then the fraction. No converting to decimals in your head.
- Lengths, areas and volumes: 12′ 6″ × 4 is 50′; length × length is square feet, × another length cubic yards.
- Round to what you work to: 1/16″, 1/8″ or coarser, with ≈ on a rounded answer.
- A tape of everything you worked out, and memory letters A to F.
- Parentheses, squares, cubes and roots, and a physical keyboard on Mac and iPad.
- Conversions between imperial and metric lengths, areas and volumes.
Stud walls
Drag a window. Watch it reframe.
Lay out the walls one after another with their doors and windows, and see every stick.
- Studs, kings, jacks, headers, cripples, sills and plates, framed around each opening.
- A cut list and what to buy in stock lengths.
- A dimensioned floor plan: tap a wall to edit it.
- 3D you can turn and zoom, to check it before anyone cuts a board.
Block walls and concrete
One truck. The right truck.
Ever ordered two concrete trucks just to send one back? Get the yards right the first time.
- Grout for CMU walls, solid or cells at a spacing, plus the cells at corners, ends and every jamb.
- Lintels over openings, lintel block grouted with the wall or formed and poured.
- Slabs, footings, walls, beams, columns and round piers, with waste and pump loss.
- Rounded up to what you order, with the block count too.
On the job, at the desk.
The same app on your phone in the truck, your iPad on the tailgate and your Mac in the office.
Keyboard on Mac
Type ' and " for feet and inches, Enter for =, and Copy and Paste from the menu.
Fits any screen
Portrait or landscape, phone or tablet: the keypad and the drawings fit.
Free. Private. Open source.
No ads, no account and no tracking. The app doesn't send anything anywhere.
Nothing collected
What you type stays on your device. Privacy policy
Works offline
In the basement, on the slab, out where there's no signal.
Open source
MIT licensed. Read the code
An estimating aid
Check every number before you order or bid. Terms of use
Made by builders
Would rather someone else did the math?
A2 Calc comes from A2 Labs, the software side of A2 Construction. We built it for our own crews. If you'd rather hand the whole job to people who measure twice and order one truck, that's what A2 Construction does.
Meet A2 ConstructionGet A2 Calc
Free on Google Play now. On the App Store for iPhone, iPad and Mac soon.