欧姆定律计算器

Use the free online 欧姆定律计算器 tool. Fast, private and easy to use — runs entirely in your browser. Part of our 物理计算器 collection.

速度计算器

Distance (m) Time (s) Velocity (m/s) — leave blank to solve

Solve v = d / t for velocity, distance or time — enter any two values and get the third.

Initial velocity u (m/s) Final velocity v (m/s) Time (s)

Find acceleration from the change in velocity over time with a = (v − u) / t.

Mass (kg) Acceleration (m/s²) Force (N) — leave blank to solve

Apply Newton's second law F = m × a to solve for force, mass or acceleration.

Mass (kg) Velocity (m/s)

Compute kinetic energy in joules with KE = ½ m v² from mass and speed.

Mass (kg) Height (m)

Find gravitational potential energy with PE = m g h using standard gravity.

Mass (kg) Volume (m³) Density (kg/m³) — leave blank to solve

Solve ρ = m / V for density, mass or volume from any two known values.

Voltage V (V) Current I (A) Resistance R (Ω)

Solve V = I × R for voltage, current or resistance, with electrical power included.

Voltage (V) Current (A)

Work out electrical power in watts with P = V × I and the energy used per hour in kWh.

Drop height (m) or Fall time (s)

Get the fall time and impact velocity of an object dropped from a height, ignoring air resistance.

Frequency (Hz) Wave speed (m/s) — blank = speed of light

Convert frequency to wavelength with λ = v / f — defaults to the speed of light for radio and light waves.

Is the 欧姆定律计算器 free to use?

Yes. The 欧姆定律计算器 is completely free with no sign-up, no limits and no watermarks. You can use it as many times as you like.

Is the 欧姆定律计算器 safe and private?

Absolutely. The 欧姆定律计算器 runs entirely in your browser, so your data never leaves your device and nothing is uploaded to a server.

Do I need to install anything to use the 欧姆定律计算器?

No installation is needed. The 欧姆定律计算器 works instantly online in any modern browser on desktop, tablet or mobile.

Does the 欧姆定律计算器 work on mobile phones?

Yes. The 欧姆定律计算器 is fully responsive and works smoothly on iPhone, Android and any other device.