Construction math that keeps up with the jobsite.
Jobsite Calc is the no-nonsense calculator built for framers, remodelers, and tradespeople — unit conversion, fraction shop math, framing, rafter, and finishing tools, plus running cutlists, all in one app.
Built and maintained by Zuniga Labs.
Rafter length & birdsmouth, solved on the ladder.
Enter your roof pitch, run, and overhang to get rafter length, plumb and seat cut angles, plus a max birdsmouth depth based on your lumber size — no framing square math required.
Everything you need, none of the clutter.
Six tools, one app. Built to be fast enough to use one-handed with a pencil behind your ear.
Convert
Instant unit conversion between imperial and metric — feet, inches, fractions, and millimeters without the mental math.
Shop Math
Add, subtract, and combine fractions the way they actually show up on a tape measure — 3/8 + 1/4, done instantly.
Framing
Stud spacing, plate lengths, squaring, and stair stringer layout — the wall and floor math, calculated on the spot.
Rafters & Birdsmouth New
Enter pitch, run, and overhang for rafter length and cut angles — plus a max birdsmouth depth based on your lumber size.
Finishing New
Paint coverage and drywall/sheathing calculators, so material orders are right the first time.
Cutlist
Multiple saved projects, dimensional lumber presets, running totals, material cost estimating, and PDF export/printing (Pro).
Upgrade when you're ready for more.
Free to start, with a Pro tier for tradespeople who live in the app every day.
- ✓ Unlimited cutlist projects & items (free plan: 1 project, 10 items)
- ✓ Unlimited CSV exports (free plan: 3/month)
- ✓ PDF export, sharing & printing for your cutlists
- ✓ 1/32" fraction precision, plus remembers your settings per trade
- ✓ Priority feature requests and support
Jobsite Calc Pro
One upgrade, unlocked everywhere you work.
Made by people who've stood on the jobsite too.
Zuniga Labs is a small app studio focused on building tools that solve real, everyday problems — starting with Jobsite Calc, built for the math that happens on-site, not at a desk.
No bloat, no accounts required to get started, no clutter. Just the calculators tradespeople actually reach for, built to be fast enough to use mid-cut.
Get Jobsite Calc
Free to try right now on iPhone and Android.
iPhone link will first ask you to install Apple's free "TestFlight" app — that's normal, it's just how early access works on iPhone. Open it and Jobsite Calc installs right after.
Questions, feedback, or feature requests?
We read every message — whether it's a bug report from the field or an idea for the next calculator to build.