Work · alternatives · 2026

24 alternatives to FieldCalc HVAC

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

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
   RefriPro▲1

   Offline PT charts,error codes,service reports for HVAC techs

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

2. 2
   FieldCalc Pro

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

   Mar 2026 · bytecovesoftware.com · its alternatives →

3. 3
   HVAC Tools Hub▲4

   Free HVAC calculators and practical reference tools

   Aug 2026 · hvactoolshub.com · its alternatives →

4. 4
   TradeHub Tools▲1

   Free NEC Electrical and HVAC Field Calculators

   May 2026 · its alternatives →

5. 5
   SnappyCalc▲11

   Your calculation made easy

   2025 · snappycalc.com · its alternatives →

6. 6
   HVAC Admin ▲2

   Free tools & knowledge hub for HVAC techs

   Feb 2026 · hvacadmin.com · its alternatives →

7. 7
   HowMuchWatts▲5

   50 free calculators for home energy costs & savings

   Jul 2026 · howmuchwatts.com · its alternatives →

8. 8
   HVAC Logic▲2

   client-side HVAC & thermodynamic calculation suite

   Aug 2026 · hvaclogic.org · its alternatives →

9. 9
   PitchCalc▲4

   Free roof math

   Aug 2026 · pitchcalc.com · its alternatives →

10. 10
    Calculator Pro▲2

    200+ free calculators for finance, health & math

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

11. 11
    SuperCalc▲7

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

    2025 · supercalc.dev · its alternatives →

12. 12
    R-Pro▲2

    AI field app for HVAC techs. Offline. 10 languages.

    May 2026 · r-pro.app · its alternatives →

13. 13
    MortgageCalcGlobal▲6

    Free mortgage calculator

    Oct 2025 · mortgagecalcglobal.com · its alternatives →

14. 14
    TradeCalc

    92 free calculators for builders, contractors & DIY

    Apr 2026 · tradecalc.org · its alternatives →

15. 15
    HeatWise HVAC▲6

    Load calculations for professionals

    2025 · heatwise-hvac.com · its alternatives →

16. 16
    CalcioCalc▲2

    60 free calculators for AI, startup, marketing & finance

    Aug 2026 · calciocalc.com · its alternatives →

17. 17
    HomeCalc Pro▲2

    The ultimate mathematical toolkit for home projects.

    Aug 2026 · homecalcpro.net · its alternatives →

18. 18
    Calculator4U v2.0▲3

    170+ ad-free, client-side web tools for instant forecasting

    Jun 2026 · calculator4u.app · its alternatives →

19. 19
    FlatRateKit▲1

    Free HVAC flat-rate pricing calculators for small shops

    Aug 2026 · flatratekit.com · its alternatives →

20. 20
    CalcLab - Free Online Calculators▲8

    Life, work & project- calclab

    2025 · its alternatives →

21. 21
    USAFinCalc▲2

    Free IRS-accurate financial calculators for Americans

    May 2026 · usafincalc.com · its alternatives →

22. 22
    HubCalc▲1

    Fast, clean, and free online productivity calculators

    Aug 2026 · hub-calc.pages.dev · its alternatives →

23. 23
    SupaCalc - 100+ Free Online Calculators▲2

    113 free calculators for AI spend, GLP-1 costs & modern life

    Apr 2026 · supacalculator.com · its alternatives →

24. 24
    Trader Pro Risk Calculator ▲2

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

    Jun 2026 · linkedin.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 →