Qalculate! vs Engineering Equation Solver (EES)

Qalculate!9.0Visit EEEngineering Equation Solver (EES)6.9Visit

Higher score Qalculate! #1 in Calculators 9.0/10 Free plan Free plan✓ 6 of 6 features Visit Qalculate!

vs

EE Engineering Equation Solver (EES) #7 in Calculators 6.9/10 From $160 · 30-day trial ✓ 4 of 6 features Visit EES

• Qalculate! fits best

  Desktop users needing a powerful all-purpose calculator

• Engineering Equation Solver (EES) fits best

  Engineers solving complex equation systems

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. It never changes our verdict. How we rank.

Side by side

Feature	Qalculate! 9.0/10 Visit ↗	EEEngineering Equation Solver (EES) 6.9/10 Visit ↗
At a glance
Editor score	9.0	6.9
Ranking	#1 in Calculators	#7 in Calculators
Best for	Desktop users needing a powerful all-purpose calculator	Engineers solving complex equation systems
Pricing model	Free	Paid
Starting price	Not published	Not published
Free plan	✓ (best)	—
Free trial	—	—
Deployment	Desktop	Desktop
Platforms	Windows, Linux, macOS	Windows
Support	Docs	Email, Phone, Docs
Built for	Solo, Small business	Small business, Mid-market, Enterprise
Features Qalculate! 6/6 · Engineering Equation Solver (EES) 4/6
Scientific functions	✓	✓
Graphing	✓	✓
Equation solver	✓	✓
Financial functions	✓ (best)	Not published
Offline mode	✓	✓
Calculation history	✓ (best)	Not published
Our review
Pros	Evaluates expressions with variables, units, and functions Combines symbolic math, equation solving, and graphing Offers over 400 functions plus searchable calculation history	Solves nonlinear algebraic and differential equation systems. Includes thermodynamic and transport property functions. Supports parametric studies, uncertainty analysis, and plotting.
Cons	Desktop software only, with no mobile platform listed Support channels are limited to documentation Its broad feature set may be more than basic calculations require	Runs on Windows only. Commercial and Professional license prices are not stated here. Advanced optimization and automation features are limited to Professional.
Our verdict	Qalculate! is a free, open-source desktop calculator for people who need more than basic arithmetic. Its graphical GTK and Qt interfaces and command-line interface are available on Windows, Linux, and macOS. It handles expressions with… Read the review →	Engineering Equation Solver (EES) is a Windows desktop program for engineers and others who regularly work with equation-based problems. It solves nonlinear algebraic and differential systems, and includes thermodynamic and transport… Read the review →

Strengths and trade-offs

• Qalculate! — where it wins

  • Evaluates expressions with variables, units, and functions
  • Combines symbolic math, equation solving, and graphing
  • Offers over 400 functions plus searchable calculation history

  Where it doesn't

  • Desktop software only, with no mobile platform listed
  • Support channels are limited to documentation
  • Its broad feature set may be more than basic calculations require

• Engineering Equation Solver (EES) — where it wins

  • Solves nonlinear algebraic and differential equation systems.
  • Includes thermodynamic and transport property functions.
  • Supports parametric studies, uncertainty analysis, and plotting.

  Where it doesn't

  • Runs on Windows only.
  • Commercial and Professional license prices are not stated here.
  • Advanced optimization and automation features are limited to Professional.

• Qalculate!9.0/10 · Free plan

  A free desktop calculator for expressions, symbolic math, equation solving, and graphing.

  Visit Qalculate!Full verdict →
• EEEngineering Equation Solver (EES)6.9/10 · From $160 · 30-day trial

  A Windows equation solver for engineers working with complex systems and properties.

  Visit EESFull verdict →