Convert engineering quantities
Move between SI prefixes, pressure, force, energy, power, and torque units for quick notes.
Free Physics Tools
Convert engineering units, solve electrical formulas, decode resistor colors, and run browser-local engineering calculators.
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Popular workflows
Solve electronics basics
Use Ohm’s law and resistor color code helpers for browser-local electronics checks.
Estimate wave and motion values
Calculate frequency, wavelength, density, and constant-acceleration kinematics from pasted values.
Common tasks
- Convert SI-prefixed measurements such as km, MHz, or mA.
- Convert pressure, force, energy, power, and torque units.
- Solve Ohm’s law values from two known electrical quantities.
- Calculate density, wavelength, or constant-acceleration motion locally.
All tools in this topic
SI Prefixes Converter Convert SI-prefixed values locally for quick, non-certified estimates Angle Converter Convert degrees, radians, turns, and grads for quick, non-certified estimates Pressure Converter Convert pascal, bar, atmosphere, psi, and torr values for quick, non-certified estimates Force Converter Convert newtons, kilonewtons, dyne, kilogram-force, and pound-force for quick, non-certified estimates Energy Converter Convert joules, watt-hours, kilowatt-hours, calories, and BTU for quick, non-certified estimates Power Converter Convert watts, kilowatts, horsepower, and BTU per hour for quick, non-certified estimates Torque Converter Convert newton-meters, pound-feet, pound-inches, and kilogram-force meters for quick, non-certified estimates Density Calculator Calculate density, mass, or volume from two known values for quick, non-certified estimates Frequency Wavelength Calculator Convert frequency and wavelength using the speed of light for quick, non-certified estimates Ohm's Law Calculator Solve voltage, current, resistance, and power for quick, non-certified estimates Resistor Color Code Calculator Decode 4-band resistor colors for quick, non-certified estimates Kinematics Calculator Solve constant-acceleration values for quick, non-certified estimates Mass Converter Convert kg, g, lb, and oz values locally Volume Flow Rate Converter Convert m3/s, L/s, L/min, and gal/min values
Frequently asked questions
Are these calculators browser-local?
Yes. Physics calculators run in your browser and do not upload inputs.
Can I use them for certified engineering work?
No. Treat results as quick estimates and verify critical work with approved tools.
Can I solve electrical formulas?
Yes. Ohm’s Law Calculator solves voltage, current, resistance, and power from two known values.
Does this duplicate Measurement tools?
No. Measurement links everyday conversions; Physics focuses on engineering and formula calculators.