Work · alternatives · 2026

24 alternatives to FieldCalc Pro

28 code-compliant calculators. 100% offline. No account.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1. 1
   FieldCalc HVAC▲8

   Offline HVAC calculator: R-454B PT, superheat, duct, load

   Jul 2026 · apps.apple.com · its alternatives →

2. 2
   BizCalc▲64

   Free business calculators — instant results, no signup

   Apr 2026 · bizcalc.talha-naeem1920.workers.dev · its alternatives →

3. 3
   TradeCalc

   92 free calculators for builders, contractors & DIY

   Apr 2026 · tradecalc.org · its alternatives →

4. 4
   LineCalc▲7

   Free online calculator with real-time collaboration

   Dec 2025 · linecalc.com · its alternatives →

5. 5
   Workshop Calc▲3

   Offline machinist calculators for real shop work

   Jul 2026 · yunfanlabs.com · its alternatives →

6. 6
   ElectricianCalc.com▲11

   Free electrical calculators & tools

   2025 · electriciancalc.com · its alternatives →

7. 7
   ElectroCalc Pro v1.0▲2

   Calculator for electromechanical engineers

   Jun 2026 · nadirkdr.github.io · its alternatives →

8. 8
   Electro Master▲3

   Electro Master — pro electrical calculators in your pocket

   Jul 2026 · play.google.com · its alternatives →

9. 9
   TradeHub Tools▲1

   Free NEC Electrical and HVAC Field Calculators

   May 2026 · its alternatives →

10. 10
    CalcShed▲1

    Free construction calculators for contractors and DIYers

    May 2026 · calcshed.com · its alternatives →

11. 11
    NimbleCalc▲3

    52 free online calculators — no sign-up, no paywalls

    Jul 2026 · nimblecalc.com · its alternatives →

12. 12
    HomeCalc Pro▲2

    The ultimate mathematical toolkit for home projects.

    Aug 2026 · homecalcpro.net · its alternatives →

13. 13
    The CACulator by Flyweel▲9

    A free, AI-powered CAC calculator—so it finally make cents.

    2025 · caculator.flyweel.co · its alternatives →

14. 14
    Abo Suhail - Advanced PWA Calculator▲5

    Advanced calculator with full offline support& modern design

    Dec 2025 · abo-suhail-calculator.vercel.app · its alternatives →

15. 15
    Calculator Center▲2

    29 free calculators that show their work — no black boxes

    Aug 2026 · calculatorcenter.online · its alternatives →

16. 16
    Trade Tools - Free tool for Construction▲3

    Pipe, concrete, electrical & tile calculators — free

    May 2026 · pipesizecalculator.com · its alternatives →

17. 17
    ElecCalc▲2

    Australian Electrical Calculator App

    Apr 2026 · eleccalc.au · its alternatives →

18. 18
    CalcNovaHub▲4

    224+ free calculators with every formula explained

    Jun 2026 · calcnovahub.com · its alternatives →

19. 19
    Trader Pro Risk Calculator ▲2

    The only 100% offline risk calculator for traders. One pay

    Jun 2026 · linkedin.com · its alternatives →

20. 20
    Tiny calculators for big decisions▲7

    Free fast accurate. Data-driven decisions with confidence

    Nov 2025 · minicalchub.com · its alternatives →

21. 21
    SuperCalc▲7

    15+ working calculators for finance & health (more weekly)

    2025 · supercalc.dev · its alternatives →

22. 22
    Calculator Pro▲2

    200+ free calculators for finance, health & math

    Jun 2026 · calculator-pro.org · its alternatives →

23. 23
    Cool calculator▲2

    One calculator for math, finance, units & style

    Mar 2026 · play.google.com · its alternatives →

24. 24
    CalcFleet▲3

    120+ tested calculators, each also a JSON API and MCP tool

    Jul 2026 · calcfleet.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →