Kraftkalkylator

Use the free online Kraftkalkylator tool. Fast, private and easy to use — runs entirely in your browser. Part of our Fysikkalkylatorer collection.

Hastighetskalkylator

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 Kraftkalkylator free to use?

Yes. The Kraftkalkylator is completely free with no sign-up, no limits and no watermarks. You can use it as many times as you like.

Is the Kraftkalkylator safe and private?

Absolutely. The Kraftkalkylator 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 Kraftkalkylator?

No installation is needed. The Kraftkalkylator works instantly online in any modern browser on desktop, tablet or mobile.

Does the Kraftkalkylator work on mobile phones?

Yes. The Kraftkalkylator is fully responsive and works smoothly on iPhone, Android and any other device.