Best Free Finance, Scientific & Engineering Calculators (2026)

Built for engineers, analysts, and students who need transparent formulas, deterministic precision, and downloadable tables without spreadsheet setup.

1

Amortization, NPV/XIRR, Bond YTM & FIRE Finance Studio

Loan schedules with extra payments, APR solver, bond duration/convexity, XIRR/MIRR, and inflation-adjusted growth

FreeNo account
  • Full amortization CSV schedules
  • XIRR, MIRR, NPV & break-even solvers
  • Bond price, YTM & Macaulay duration
Try it free
2

Engineering Unit, IEEE 754 & Circuit Calculator Studio

NIST unit conversions across physical domains, IEEE 754 Float32 bit inspector, and RC / 50-Ohm RF calculators

FreeNo account
  • US vs Imperial & SI precision factors
  • IEEE 754 sign/exponent/mantissa view
  • Electrical RC & dBm/Watt RF solvers
Try it free
3

Scientific AST, Matrix & Numerical Calculus Studio

Expression AST evaluator with DEG/RAD/GON trigonometry, combinatorics, 3×3 matrices, and Simpson integration

FreeNo account
  • Safe deterministic AST parser
  • DEG, RAD & GON surveying angles
  • Matrix determinant/inverse & integrals
Try it free

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