Science & Engineering Tools

Free scientific and engineering calculators that run entirely in your browser—no installs, no watermarks.

What this category does

Science & Engineering Tools helps you free scientific and engineering calculators that run entirely in your browser—no installs, no watermarks.

What you get

Science & Engineering Tools gives you a local, searchable index of browser-first tools to open next, and helps you move directly into each route without leaving this page.

Ohm's Law Calculator

Solve for voltage, current, or resistance with automatic unit guidance.

Visit Ohm's Law Calculator

Series & Parallel Resistor Calculator

Compute equivalent resistance for series and parallel resistor networks.

Visit Series & Parallel Resistor Calculator

Resistor Color Code Decoder

Translate resistor color bands into resistance values and tolerances.

Visit Resistor Color Code Decoder

LED Resistor Calculator

Determine the ideal series resistor for safely driving LEDs.

Visit LED Resistor Calculator

Reactance Calculator

Calculate capacitive or inductive reactance at any frequency.

Visit Reactance Calculator

RC & RL Time Constant

Find the time constant for RC and RL circuits instantly.

Visit RC & RL Time Constant

Frequency ↔ Wavelength ↔ Period

Convert between frequency, wavelength, and period with a single input.

Visit Frequency ↔ Wavelength ↔ Period

Decibel Converter

Convert power ratios into decibels for audio and RF engineering.

Visit Decibel Converter

Projectile Motion Simulator

Model projectile flight path, range, and peak altitude in real-time.

Visit Projectile Motion Simulator

Molar Mass Calculator

Compute molar mass from chemical formulas including nested groups.

Visit Molar Mass Calculator