Comparison

Electronic Formulator vs Metal Calculator A1 Pro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Electronic Formulator

Features
Read full description

Electronic Engineer puts over 1,100 formulas and 24 reference tables in your pocket. No internet required. No ads. Just fast, accurate calculations when you need them. POWERFUL CALCULATORS Solve real-world electrical problems instantly: • Ohm's Law — Voltage, current, resistance, and power calculations • Voltage Divider — Output voltage, resistor values, current, and power dissipation • Three-Phase Power — Balanced systems, Wye and Delta connections • LED Circuits — Series resistor selection, power dissipation, max LEDs in series • 555 Timer — Astable and monostable modes with frequency, duty cycle, and timing • RLC Circuits — Resonant frequency, Q factor, bandwidth, impedance, and reactance • Power Triangle — Real, reactive, and apparent power with PF correction sizing • Impedance & Resistance — AC/DC circuit analysis • Star-Delta Conversion — Transform between Y and Δ configurations • Wheatstone Bridge — Unknown resistance and unbalanced bridge voltage • Inductors — Reactance, energy storage, series/parallel, and time constants • Wire Sizing — Circular mils, voltage drop (single and three-phase) • Capacitors, Transformers, Motors, Batteries, UPS, Lighting, and more PRO CALCULATORS Unlock advanced tools for professionals: • Op-Amp Circuits — Inverting, non-inverting, differential, and voltage follower • Filter Design — RC and RL low-pass, high-pass, and bandpass filters • PCB Trace Width — IPC-2221 current capacity and trace resistance • Skin Effect — Depth calculations for copper and custom conductors 24 REFERENCE TABLES Instantly look up critical data — no more flipping through handbooks: • AWG Wire Gauge — Diameter, area, resistance, and ampacity • NEC Ampacity Table — 60°C, 75°C, and 90°C conductor ratings • Resistor Color Codes — 4-band and 5-band decoding • Standard Resistor Values — E12, E24, E48, and E96 series • Circuit Breaker Sizes — Amp ratings, wire sizes, and typical applications • Wiring Color Codes — NEC, IEC, and Australian standards • Logic Gates Truth Tables — AND, OR, NAND, NOR, XOR, XNOR • Transformer Connections — Delta, Wye, Scott-T, Zig-Zag, and more • Power Factor Reference — Typical PF for motors, lighting, drives, and loads • SI Prefixes — From tera to femto with electronics examples • Conductor Properties — Resistivity, conductivity, and temp coefficients • Common Semiconductor Pinouts — BJTs, MOSFETs, regulators, 555, 741 • NEMA Enclosure Types — Indoor/outdoor ratings with IP equivalents • IP Protection Ratings — Solids and liquids protection levels • Ampacity Derating Factors — Temperature and conduit fill corrections • Standard Capacitor Values — Ceramic, film, and electrolytic • Cable Types — THHN, THWN, NM-B, MC, UF-B, and more • Decibel Reference — Power and voltage ratios at a glance • Motor Frame Sizes, Fuse Classes, Conduit Fill, and more UNIT CONVERSIONS Over 400 conversion formulas across 19 categories including metric, linear, liquid, cubic, pressure, weight, flow, BTU, horsepower, watts, joules, frequency, and HVAC. Plus 8 temperature scales: Celsius, Fahrenheit, Kelvin, Rankine, Réaumur, Delisle, Newton, and Rømer. BUILT FOR YOUR WORKFLOW • Favorites — Star the calculators you use daily for one-tap access • Calculation History — Every result saved automatically for easy reference • Export & Share — Send results to colleagues or save for documentation • Search & Filter — Find any formula or reference table in seconds • Dark Mode — Designed for comfortable use on job sites and in the field • US & Metric — Toggle between unit systems instantly WHY ELECTRONIC ENGINEER? Built by engineers, for engineers. We obsessed over accuracy, speed, and completeness so you can focus on what matters — getting the job done right. One purchase, no subscriptions, no recurring fees.

About

Metal Calculator A1 Pro

This app simplifies metal quantity calculations for various projects. It offers tools for calculating quantities, shapes, joints, and performing material tests. Supports both Imperial and Metric systems, with a wide range of metal types and converters.

Highlights
  • Quantity calculations for pipes, bars, sheets, and beams
  • Shape customization for metal bars
  • Detailed joint calculations (welded, bolted, riveted)
  • Material testing (fatigue, bend, hardness, impact, tensile)
  • Unit converters (length, volume, density)
  • Support for various metal types and materials
  • Detailed reporting and user-friendly interface
Features
Read full description

Metal Calculator A1 Pro - the complete metal weight calculator, steel price calculator, fabrication estimator, and welding tool for steel, stainless steel, aluminium, copper, brass, and 100+ metals. Trusted by metal traders, scrap dealers, fabricators, welders, and civil & mechanical engineers to calculate metal weight, price, cutting waste, and fabrication quotes in seconds - no more weight tables or guesswork. --- CALCULATE WEIGHT OF ANY METAL SECTION --- - Round bar, square bar, hex bar, flat bar, angle, channel, I-beam, pipe, square & rectangular tube, sheet & plate - Dimensions in mm, cm, m, ft, in - including feet-inch fractions (like 5 ft 6 1/2 in) - Weight per piece, per metre, per foot & total (kg, t, lb) - Reverse calculation: enter target weight to get required length and pieces - Pipe schedules (Sch 40/80) & sheet gauge presets (SWG/BWG/MSG) --- INSTANT PRICE & TAX QUOTE --- - Live price calculation with your rate per kg - Regional tax presets (GST, VAT, sales tax) in your local currency - Save rate per material with auto-fill - Share formatted quotes on WhatsApp in one tap --- FABRICATION ESTIMATOR --- - 8 products: Gate, Grill, Railing, Fence, Staircase, Shed, Mezzanine, Shutter & Tank - Automatic cut list, weld length, paint area & labour hours - Member schedule with section sizes & PDF estimate sharing --- WELDING CALCULATOR --- - Electrode count, weld metal weight & welding cost - Fillet & groove weld calculations - Weld joint types with technical drawings & symbol guide --- SHEET METAL WORK --- - Flat pattern nesting optimizer to minimize scrap - Cone & elbow development with unfolded blank sizes - Bend allowance (K-factor) calculator for press brake - Template PDF export for workshop fabrication --- CUT OPTIMIZER --- - 1D cutting stock optimizer to minimize offcuts & scrap - Compare optimized vs. sequential cutting - Kerf width and stock length settings with PDF cut plan --- SURFACE TREATMENT --- - Paint area calculator for structural steel sections - Primer, enamel & epoxy coverage with coat count - Hot-dip galvanizing weight estimator --- QUOTATION & INVOICING --- - Professional quotations with client details & line items - Tax breakdown: GST (CGST+SGST/IGST), VAT, or sales tax - Discount, freight & transport charges - Branded PDF with logo, signature & total in words --- 5 ENGINEERING CONVERTERS --- - SWG / BWG / MSG gauge to mm thickness - Weight per length: kg/m to lb/ft - Stress: MPa to psi, ksi, kgf/cm2 - Hardness: Brinell (HB) to Rockwell (HRC) to Vickers (HV) - Grade cross-reference: IS E250 to ASTM A36 to EN S275 to JIS SS400 --- STUDY LIBRARY & CHECKLISTS --- - 30+ engineering guides: Steel grades, SS, Aluminium, Coatings, Welding defects, NDT, IS 800, AISC 360, EN 1993 & Safety - Interactive inspection checklists with YES / NO / N/A audit and color PDF report - 100% offline access - zero data required --- ACCURATE & COMPREHENSIVE --- - Verified densities for 100+ alloys (mild steel, SS 304/316, Al 6061, copper, brass, titanium) - Multi-item projects & material lists (BOQ) - Unit converter & scientific calculator included - 22 languages: English, Hindi, Spanish, Arabic, Portuguese, Russian, French, German, Italian, Turkish, Indonesian, Vietnamese, Thai, Urdu, Persian & Indian regional languages - Metric & imperial units, dark mode, 100% offline support --- PRO SUBSCRIPTION --- Core calculations are free. Upgrade to Pro for unlimited PDF estimates, quotations, projects (BOQ), and an ad-free experience. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Terms of Service: https://binaryandbricks.com/app/termsofservice.html Privacy Policy: https://binaryandbricks.com/app/appsprivacypolicy.html

Screenshots

Electronic Formulator4 screens
Metal Calculator A1 Pro4 screens

Verdict

The call

The clearest difference is update cadence: Electronic Formulator at every 9 days against Metal Calculator A1 Pro's every 6 months. Metal Calculator A1 Pro's advantage is iOS requirement (15.0 vs 26.2). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Electronic Formulator sells 1 one-off in-app purchase and Metal Calculator A1 Pro sells 4 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Electronic Formulator ships an update every 9 days, Metal Calculator A1 Pro every 6 months. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Electronic Formulator versus Metal Calculator A1 Pro: the parameters behind the verdict, then further details
ParameterElectronic FormulatorMetal Calculator A1 Pro
PriceFreeFree
Rating—4.6 (5 ratings) — better
Positive reviews—60.0% of reviews
Number of ratings—5 — better
Update frequencyEvery 9 days — betterEvery 6 months
AdsNoNo
In-app purchasesYesYes
Monetization—Free
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.215.0 — better
Further details — not scored
Size19 MB94 MB
Age rating4+4+
DeveloperHistorycentral.comBinary And Bricks Pvt Ltd

In-app purchases

1 purchases

Electronic Formulator

One-time1
  • Electronic Pro$2.99
4 purchases

Metal Calculator A1 Pro

Subscriptions2
  • Metal Monthly Subscription$1.991 Month
  • Metal Yearly Subscription$12.991 Year
One-time2
  • Pro Version$12.99
  • Pro version$12.99

Questions

Is Electronic Formulator free?
Electronic Formulator is free to download, with in-app purchases available.
Is Metal Calculator A1 Pro free?
Metal Calculator A1 Pro is free to download, with in-app purchases available.
Do Electronic Formulator or Metal Calculator A1 Pro have ads?
Neither Electronic Formulator nor Metal Calculator A1 Pro shows ads.
Which is updated more often, Electronic Formulator or Metal Calculator A1 Pro?
Electronic Formulator ships an update every 9 days, and Metal Calculator A1 Pro every 6 months. Most recently, Electronic Formulator was updated on October 29, 2026 and Metal Calculator A1 Pro on October 25, 2026.

Other comparisons