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Vipul Otari

Author & Reviewer — Calculator Street

Civil DIY enthusiast, US customary units & material densities. Built every calculator by hand — formulas, examples and FAQs verified against scale-house data, TxDOT compaction guides and CPSC specs. No AI filler.

hello@calculatorst.com·GitHub·X

Experience & Expertise

  • Hands-on builds: Deck, fence, patio, gravel driveway — measured, ordered and built, then back-checked calculator outputs vs supplier tickets.
  • Densities verified: Pea 1.35, crushed 1.40, limestone 1.60 tons/yd³ vs scale-house averages; 80-lb concrete = 0.60 ft³ per manufacturer.
  • Formulas reviewed: Roof multiplier √(pitch²+144)/12, board-foot = T(in)×W(in)×L(ft)/12, rebar lap 40× diameter per ACI 318.

Review process

  1. Draft calculator with unit tests `src/utils/__tests__/units.test.ts`
  2. Hand-calculate 3 examples, compare to offline spreadsheet
  3. Cross-check vs TxDOT/CPSC and supplier yield sheets
  4. Peer check with contractor, publish with `dateModified`

E-E-A-T: Experience in DIY builds · Expertise verified vs TxDOT/CPSC · Authoritative sources cited per page · Trust via 100% in-browser, no data leaving device.

Trust & transparency

Every calculator shows formula, worked example, assumptions and related tools. See About, Privacy and Disclaimer. Corrections? Contact — we fix verified errors in 1–3 days.