01Cut list3 free runs, then Pro
Buy less lumber.
List the pieces, pick the board lengths your yard sells, and it plans every cut, buying the least length rather than the fewest boards. Kerf counted.
- Buy
- 3 × 16' + 1 × 12'
- Left over
- 3' 2-1/2" (6%)
Feet · inches · sixteenths — a calculator for iPhone
Measuretwice.Pay once.
The construction calculator that answers like your tape: feet, inches and sixteenths. It works with no signal, it needs no account, and you buy it once.
Download on the App Store
Free · Pro $24.99 one time
- Builders
- 10
- Finest mark
- 1/64"
- Signal needed
- 0 bars
Click the keys, or focus the keypad and type: digits, apostrophe for feet, quote for inches, slash for a fraction, plus, minus, star for times, equals or Enter for the answer, Escape to clear.
12' 7-3/8" + 3' 2-1/4"
15' 9-5/8"
= 189.625 in
- 12' 7-3/8" + 3' 2-1/4"15' 9-5/8"
01 ·The argument · 1 of 3
Your calculator doesn’t need a landlord.
Feet-inch math is free forever. Pro is $24.99 once, works offline from the minute you buy it, and never checks in to see if you’ve paid.
SiteSum
Sales receipt · No. 0001
Pay once. Own it.
SiteSum Pro$24.99
RenewalsNONE
Online checkNONE
- Cut list and 9 more builders
- Jobs, notes, CSV and PDF export
- 1/32" and 1/64" precision
- Home Screen widget
TOTAL$24.99 one time
RenewalsNone
Online checkNone
AccountNone
Rather rent? Pro monthly is there at $4.99 a month, and Pro Family covers six people for $34.99 once. We just don’t think a calculator should need either.
02 ·The argument · 2 of 3
Answers in sixteenths, not decimals.
Type it the way you read the tape, 12 Ft 7 In 3/8, and the answer comes back the same way. When a sixteenth had to round, it says ≈ instead of pretending.
15.802' (struck out: you’d still have to turn it into inches)
SiteSum
15' 9-5/8"
12' 7-3/8" + 3' 2-1/4" = 15' 9-5/8", on the tape: past the 9, at the fifth eighth.
9' 0" rise ÷ 14 risers
≈ 7-11/16"
Cut all 14 risers at that mark and the stair ends 3/8" short. The ≈ is the app telling you so, before the saw does.
03 ·The argument · 3 of 3
No bars. Still works.
Basements, crawlspaces, the far lot of a new subdivision. SiteSum needs no signal and no account, so the answer is there wherever the work is.
“14 feet 3 and a half minus 2 feet 7 and five eighths.”
Siri, no signal11' 7-7/8"
Monday, October 19
7:12
“14 feet 3 and a half minus 2 feet 7 and five eighths”
11' 7-7/8"
SiteSum · Calculate
- Offline
- Every sum, every builder, every export. Nothing waits on a server.
- No account
- Nothing to sign up for, nothing to log into on a ladder.
- Siri
- “Calculate with SiteSum.” It answers without opening the app.
- Lock Screen
- One tap from the clock to the keypad, and a button in Control Center.
- Gloves
- Keys never shrink below 64 points. VoiceOver reads fractions in words.
04 ·The builders
Ten builders. One keypad.
Each one works the job out from the numbers on your plans, prints the answer to the tape, and gives you three full runs free before it asks for anything.
02Stairs3 free runs, then Pro
Stairs in one number.
Total rise in, and out come the risers, treads, total run, stringer length and angle, to the sixteenth, with ≈ where it rounds.
- Risers
- 14 at ≈ 7-11/16"
- Treads
- 13
- Stringer
- ≈ 14' 1"
04Layout3 free runs, then Pro
Every stud mark, called out.
16 or 24 inches on center, marked from the end so the sheet edges land mid-stud. Each mark is rounded from the start, never from the last mark, so error never adds up.
- Studs
- 10
- Marks
- 1' 3-1/4", 2' 7-1/4", …
- End stud
- 11' 10-1/2"
And seven more, for the rest of the job
12' 0" run at 6/12, 1' overhang≈ 14' 5-9/16" line length
Diagonal
Any two sides give the third.
12' 0" × 16' 0" frame20' 0" corner to corner
Board feet
Lumber by the board foot, with the bill.
10 × 2×10 × 12'200 board feet
Concrete
Yards with waste, rounded up. Bags too.
10' × 12' × 4" slab, 10% waste1.63 yd³, or 74 80-lb bags
Area
Rectangles, triangles, circles, and volume.
12' × 16' floor192 ft²
Materials
Sheets, shingles and tile.
16' × 8' wall in 4×8 sheets, 10% waste5 sheets
Balusters
Count, gap and every mark from the post.
6' 0" between posts, gaps under 4"13 balusters, 3-3/4" gaps
05 ·The tape
Hand over a clean tape.
Every answer prints to a paper tape, the way an adding machine does. Name a tape after the job, then send it as a PDF to the client or a CSV to the office.
Free: a Scratch tape of the last 20 lines. Pro: named jobs, notes, PDF and CSV.
Garage deck
6 lines · Pro
Export
- 12' 7-3/8" + 3' 2-1/4"15' 9-5/8"
- Stairs · total rise9' 0"
- Risers14 at ≈ 7-11/16"
- Stringer≈ 14' 1"
- 14' 3-1/2" − 2' 7-5/8"11' 7-7/8"
- Concrete · 10' × 12' × 4"1.63 yd³
06 · House rules
House rules.
What the app refuses to do, so you don’t have to check.
- Rule 01
Arithmetic is never locked.
Pro buys builders, precision and exports. Adding feet and inches stays free.
- Rule 02
A rounded answer says ≈.
If a sixteenth had to round, the readout, the tape and the builder all show it.
- Rule 03
Every key shows what it did.
A key either changes the screen or is refused, with the reason on the sum line.
- Rule 04
Left over, not waste.
A 4-foot end off an 8-foot board is the next job’s blocking.
- Rule 05
Check your local code.
Riser and gap limits are marked as reference defaults. The inspector has the last word.
- Rule 06
No account. No signal. No problem.
Nothing to sign into, nothing to sync, nothing that stops in a basement.
07 ·Proof
We don’t make up reviews.
SiteSum is new. When builders tell us what they think, it goes here with their name on it, and not before.
TODO · placeholder
A real review from a builder goes here, word for word.
Name · trade · town
TODO · placeholder
A real review from a builder goes here, word for word.
Name · trade · town
TODO · placeholder
A real review from a builder goes here, word for word.
Name · trade · town
No ratings, no download counts, no logos. Not yet, and never invented.
08 ·Price
Free, or $24.99. Your call.
The keypad, the tape and Siri are free for good. Pro unlocks every builder with one purchase that never renews.
Free
$0for good
- Feet-inch-fraction keypad and Conv
- Scratch tape, last 20 lines
- 1/16" precision, imperial and metric
- Siri, Lock Screen widget, Control Center
- Three full runs of every builder
Pro
Best value$24.99one time
- All ten builders, as often as you like
- 1/32" and 1/64" precision
- Named jobs and notes
- PDF and CSV export
- Home Screen widget
Pro Family
$34.99one time
- Everything in Pro
- For up to six people in your Family Sharing group
Or Pro monthly at $4.99 a month, which renews until you cancel it in Settings. Prices are in US dollars; the App Store shows yours.
09 · The total
Measure twice. Pay
Free to download. Feet-inch math free for good. Pro is $24.99, once.