Engineering Calculator

Use engineering tools for beam deflection, Ohm law, axial stress, strain, and technical calculations.

Center deflection

0.203 mm

Simple supported beam, center point load

Max bending moment

720 N m

P x L / 4

Bending stress

3.388 MPa

Approximate extreme-fiber stress

Engineering mode

Switch between beam, circuit, and axial stress calculations.

Beam assumption

Simple support

Center point load on a prismatic beam

Circuit assumption

24 W

Power from voltage and resistance

Stress assumption

208.333 MPa

Uniform axial stress across the section

What is the engineering calculator?

Mowatool’s engineering calculator brings trigonometric, hyperbolic, logarithmic, complex-number, matrix, and unit-conversion work into one online scientific platform. The Korean page emphasizes experiment verification, circuit and control design, engineering homework, precision control, and local encrypted history.

The tool supports 120+ built-in functions, 60+ unit conversions, DEG, RAD, and GRAD angle modes, a 200-line program mode, fixed/scientific/engineering notation switching, high precision up to 30 digits, and AES-GCM encrypted local history.

Calculation work areas

Standard, program, complex, and matrix modes

  • Standard mode evaluates one-line expressions with trigonometric functions, hyperbolic functions, logarithms, powers, gamma-style functions, RMS, percentage helpers, and constants.
  • Program mode can run scripts up to 200 lines, useful for repeated heat-transfer, circuit, or control-logic calculations.
  • The complex-number workbench computes arithmetic, magnitude, phase angle, and fractional forms for AC impedance and signal analysis.
  • Matrix tools handle determinant, inverse, and trace for square matrices, including up to 4 x 4 Gauss-Jordan inverse calculations.
  • The unit converter covers 19 physical quantity categories and 60+ unit tables, including temperature conversions with offsets.

Precision and data safety

  • High-precision mode applies toPrecision-style correction to keep up to 30 significant digits without depending on BigNumber.
  • When differences below 1e-9 appear, the tool warns that result review is needed because cancellation error may matter.
  • Division by zero, negative factorials, non-square matrices, and unrecognized tokens are blocked before evaluation.
  • The most recent 50 history entries and user variables are encrypted with AES-GCM in IndexedDB and are not sent to the server.

Engineering scenarios and references

Practical uses

  • AC circuit analysis: compute impedance, phase, dBm to W, ohm to milliohm, and frequency sweep values.
  • Control and robotics: calculate state equations, transition matrices, Jacobians, sensor angles, and gain drift.
  • Materials and chemical processes: use exponential and logarithmic functions plus temperature, pressure, and energy unit conversion for international standards.
  • For angle setup, RAD is recommended for circuit analysis and DEG for geometry calculations.

Validation policy

  • Function outputs are cross-checked against WolframAlpha and NIST Digital Library values within +/- 1e-12 in the source policy.
  • Matrix operations are compared with Python NumPy and LAPACK results.
  • Unit coefficients reflect 2025 KS/ISO, NIST Reference Data, and IEC 60027 standards.