
Smart Roofing Calculator
120+ roofing calculators — plus deck, fence, drywall, insulation, tile, sod and gravel tools in v1.7.

The roofing and construction formulas behind our calculator sites, as a JSON REST API.
The Construction Calculator API exposes the formulas behind smartroofingcalculator.com and the studio's other trade calculators as a REST API: roof area from footprint and pitch, shingle bundles, underlayment rolls, nails, deck boards and joists, fence posts and pickets, drywall sheets, insulation, tile, sod, gravel and concrete. Send JSON, get JSON back, in imperial or metric units. Keys are issued through RapidAPI, which has a free plan for testing and paid plans for higher volume. The developer page on smartroofingcalculator.com lists every endpoint with examples.
Developers building contractor quoting tools, estimating software, lead-gen forms and home-improvement apps.
Subscribe on RapidAPI (rapidapi.com/stefanodixon/api/construction-calculator-api). The Basic plan is free for testing.
On the developer page at smartroofingcalculator.com/api/ and in the RapidAPI listing.

120+ roofing calculators — plus deck, fence, drywall, insulation, tile, sod and gravel tools in v1.7.

Estimate deck size, materials, and cost in seconds — on Android or the web.

Business templates and free generators that export a clean PDF.