SiteCalc is an iOS construction calculator app with 85 calculators across 10 trades: concrete and masonry, framing and lumber, roofing, electrical, plumbing, HVAC, paint and finish, tile and flooring, landscape and sitework, and general. It costs $29.99 one-time with no subscription, no ads, and no in-app purchases. Built for contractors, electricians, plumbers, framers, roofers, HVAC technicians, painters, tilers, landscapers, and DIYers. Features include voice input with fraction parsing, AR camera measurement, a reverse budget calculator, guided projects with material lists, formula display with NEC/IRC/IPC code references, saved jobs, PDF export, and full offline support. Made by Creayo LLC.
Stop Googling formulas on the job site
You're standing at the truck, phone in one hand, trying to figure out how many bags of concrete you need. Or how much rebar. Or what size wire to pull for a 60-amp sub-panel 150 feet away. You shouldn't have to dig through search results for basic trade math. SiteCalc puts every formula in your pocket and does the arithmetic for you.
Every number you need
From rebar to ridge cap. Pick a calculator, punch in your dimensions, get your answer. No guessing, no rounding in your head.
Every calculator shows its formula. Tap "Show Formula" to see the exact math. NEC wire tables, IRC span tables, IPC fixture unit counts -- all built in.
What does $X build?
Most calculators go from dimensions to cost. The budget calculator goes the other direction. Enter a dollar amount and SiteCalc tells you exactly how much material it buys.
Got $52 for rebar? That's 3 sticks of #4, 60 linear feet at 12" OC in one direction. The math runs backward so you don't have to.
Planned jobs. One list.
Group your calculations by project. A deck build pulls in concrete for the footings, lumber for the boards, and gives you a running cost estimate. All in one view.
Guided projects walk you through step by step. One material list, one cost total. Your whole job on a single screen.
Measure with your camera
Tape's in the truck? Point your phone, tap two points, get a measurement. Feet, inches, decimal, metric -- all at once. Tap "Use This Measurement" and it drops right into whatever calculator you're using.
Not a replacement for a tape measure. But it's a lot better than eyeballing it.
10 trades. 85 calculators.
Every category has the calculators that trade actually uses. Real job-site math, not novelty conversions.
Concrete & Masonry
Slabs, footings, columns, block, rebar, steps, walls, wire mesh, curb, grout fill
Framing & Lumber
Board foot, studs, rafters, stairs, headers, decking, joists, sheathing, beams, trusses
Roofing
Roof area, shingles, pitch, ventilation, materials, gutters
Electrical
Wire sizing, conduit fill, service load, box fill, voltage drop, EV charger, breakers
Plumbing
Pipe sizing, drain slope, water heater, DFU, gas pipe, WSFU
HVAC
Duct sizing, heat load, refrigerant charge, static pressure, CFM, bath fan, range hood, PT chart
Paint & Finish
Wall area, paint coverage, wallpaper, drywall, corner bead, trim, primer, exterior, stain
Tile & Flooring
Tile count, flooring, baseboard, thinset, backer board, carpet, transitions, waterproofing
Landscape & Sitework
Mulch, topsoil, retaining walls, slope, fence posts, excavation, pavers, fabric, picket fence
General
Unit converter, angle/miter, diagonal check, area calc, weight, insulation, budget calc
Built for the field
A native iOS app that works on the job site, in the truck, and in the supply house aisle. No signal required.
Voice input
Say your dimensions. SiteCalc fills in the fields. Faster than typing with dirty gloves.
AR measurement
Point your camera. Tap to measure. Feed the result straight into any calculator.
Budget calculator
Enter a dollar amount. SiteCalc tells you how much material that buys. Reverse math, solved.
Guided projects
9 project templates chain calculators together. One material list per build.
Show formula
Every calculator shows its math. NEC, IRC, IPC references built in. Verify before you pour.
PDF export
Share results as PDF or text. Send material lists to suppliers, clients, or inspectors.
Code references
NEC, IRC, IPC, IFGC citations next to every result. The code section, not just the answer.
Material prices
65 materials priced with national averages. Override any price with your local number.
Siri Shortcuts
35 calculators as Siri Shortcuts. Open from the lock screen or by voice.
One price. Every calculator.
No subscription. No ads. No in-app purchases. No "pro tier." Pay once, get everything.
From the blog
Trade math guides, code reference walkthroughs, and honest takes on construction apps.
How to Calculate Concrete for a Slab
Cubic yard formula, waste factors, and when bags beat ready-mix.
How to Size Wire for a Circuit
NEC 310.16 ampacity table, voltage drop formula, and when to upsize.
Rebar Spacing Calculator
Spacing in both directions, bar weight, lap splices, and ACI 318 references.