Kostenlose Physik-Formelsuche und -Rechner

Durchsuchen Sie über 80 Physikformeln nach Thema mit Variablendefinitionen und einem Rechner, der nach jeder Variable auflöst. Kostenlos, schnell und läuft vollständig in Ihrem Browser, ganz ohne Anmeldung.

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Physics Formula Lookup & Calculator

Search 80+ physics formulas organized by topic — mechanics, waves, thermodynamics, electricity, and optics. Includes a solve-for-any-variable calculator.

35 formulas

Velocity

Mechanics
v = d / t

Velocity equals displacement divided by time.

v = Velocity (m/s)
d = Displacement (m)
t = Time (s)

Acceleration

Mechanics
a = Δv / t

Acceleration is the change in velocity over time.

a = Acceleration (m/s²)
Δv = Change in velocity (m/s)
t = Time (s)

Kinematic Equation (v = u + at)

Mechanics
v = u + a·t

Final velocity from initial velocity, acceleration, and time.

v = Final velocity (m/s)
u = Initial velocity (m/s)
a = Acceleration (m/s²)
t = Time (s)

Kinematic Equation (s = ut + ½at²)

Mechanics
s = u·t + ½·a·t²

Displacement from initial velocity, acceleration, and time.

s = Displacement (m)
u = Initial velocity (m/s)
a = Acceleration (m/s²)
t = Time (s)

Newton's Second Law

Mechanics
F = m·a

Force equals mass times acceleration.

F = Force (N)
m = Mass (kg)
a = Acceleration (m/s²)

Weight

Mechanics
W = m·g

Weight equals mass times gravitational acceleration (g ≈ 9.81 m/s²).

W = Weight (N)
m = Mass (kg)
g = Gravitational acceleration (m/s²)

Kinetic Energy

Mechanics
KE = ½·m·v²

Kinetic energy of a moving object.

KE = Kinetic energy (J)
m = Mass (kg)
v = Velocity (m/s)

Gravitational Potential Energy

Mechanics
PE = m·g·h

Energy stored due to an object's height above a reference point.

PE = Potential energy (J)
m = Mass (kg)
g = Gravity (m/s²)
h = Height (m)

Work

Mechanics
W = F·d·cos(θ)

Work done by a force over a displacement at angle θ.

W = Work (J)
F = Force (N)
d = Displacement (m)
θ = Angle (°)

Power

Mechanics
P = W / t

Power is work done per unit time.

P = Power (W)
W = Work (J)
t = Time (s)

Momentum

Mechanics
p = m·v

Linear momentum equals mass times velocity.

p = Momentum (kg·m/s)
m = Mass (kg)
v = Velocity (m/s)

Centripetal Acceleration

Mechanics
a_c = v² / r

Centripetal acceleration for circular motion.

a_c = Centripetal acceleration (m/s²)
v = Speed (m/s)
r = Radius (m)

Newton's Law of Gravitation

Mechanics
F = G·m₁·m₂ / r²

Gravitational force between two masses. G = 6.674 × 10⁻¹¹ N·m²/kg².

F = Force (N)
G = Gravitational constant (N·m²/kg²)
m₁ = Mass 1 (kg)
m₂ = Mass 2 (kg)
r = Distance (m)

Friction Force

Mechanics
f = μ·N

Friction force equals coefficient of friction times normal force.

f = Friction force (N)
μ = Coefficient of friction (dimensionless)
N = Normal force (N)

Wave Speed

Waves & Sound
v = f·λ

Wave speed equals frequency times wavelength.

v = Wave speed (m/s)
f = Frequency (Hz)
λ = Wavelength (m)

Period and Frequency

Waves & Sound
T = 1 / f

Period is the reciprocal of frequency.

T = Period (s)
f = Frequency (Hz)

Doppler Effect

Waves & Sound
f_obs = f_s · (v + v_obs) / (v + v_s)

Observed frequency when source or observer is moving. Use + for approaching, − for receding.

f_obs = Observed frequency (Hz)
f_s = Source frequency (Hz)
v = Speed of sound (m/s)
v_obs = Observer speed (m/s)
v_s = Source speed (m/s)

Snell's Law

Optics
n₁·sin(θ₁) = n₂·sin(θ₂)

Relates angles of incidence and refraction at a boundary between media.

n₁ = Refractive index 1 (dimensionless)
θ₁ = Angle of incidence (°)
n₂ = Refractive index 2 (dimensionless)
θ₂ = Angle of refraction (°)

Thin Lens Equation

Optics
1/f = 1/d_o + 1/d_i

Relates focal length to object and image distances.

f = Focal length (m)
d_o = Object distance (m)
d_i = Image distance (m)

Magnification

Optics
m = -d_i / d_o = h_i / h_o

Lateral magnification from image and object distances or heights.

m = Magnification (dimensionless)
d_i = Image distance (m)
d_o = Object distance (m)
h_i = Image height (m)
h_o = Object height (m)

Ideal Gas Law

Thermodynamics
PV = nRT

Relates pressure, volume, moles, and temperature of an ideal gas. R = 8.314 J/(mol·K).

P = Pressure (Pa)
V = Volume ()
n = Moles (mol)
R = Gas constant (J/(mol·K))
T = Temperature (K)

Heat Transfer (Q = mcΔT)

Thermodynamics
Q = m·c·ΔT

Heat absorbed or released equals mass times specific heat times temperature change.

Q = Heat (J)
m = Mass (kg)
c = Specific heat (J/(kg·K))
ΔT = Temperature change (K)

Linear Thermal Expansion

Thermodynamics
ΔL = α·L₀·ΔT

Change in length due to temperature change. α is the linear expansion coefficient.

ΔL = Change in length (m)
α = Expansion coefficient (1/K)
L₀ = Original length (m)
ΔT = Temperature change (K)

Thermal Efficiency

Thermodynamics
η = W / Q_h = 1 - T_c / T_h

Efficiency of a heat engine (Carnot limit).

η = Efficiency (dimensionless)
T_c = Cold temperature (K)
T_h = Hot temperature (K)

Ohm's Law

Electricity
V = I·R

Voltage equals current times resistance.

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

Electric Power

Electricity
P = V·I = I²·R = V²/R

Power dissipated in an electrical component.

P = Power (W)
V = Voltage (V)
I = Current (A)
R = Resistance (Ω)

Resistors in Series

Electricity
R_total = R₁ + R₂ + ... + Rₙ

Total resistance of resistors connected in series.

R_total = Total resistance (Ω)
R₁, R₂ = Individual resistances (Ω)

Resistors in Parallel

Electricity
1/R_total = 1/R₁ + 1/R₂ + ...

Total resistance of resistors connected in parallel.

R_total = Total resistance (Ω)
R₁, R₂ = Individual resistances (Ω)

Capacitor Charge

Electricity
Q = C·V

Charge stored in a capacitor equals capacitance times voltage.

Q = Charge (C)
C = Capacitance (F)
V = Voltage (V)

Coulomb's Law

Electricity
F = k·q₁·q₂ / r²

Electrostatic force between two charges. k = 8.99 × 10⁹ N·m²/C².

F = Force (N)
k = Coulomb constant (N·m²/C²)
q₁ = Charge 1 (C)
q₂ = Charge 2 (C)
r = Distance (m)

Electric Field

Electricity
E = F / q = k·Q / r²

Electric field strength at a distance r from charge Q.

E = Electric field (N/C)
F = Force (N)
q = Test charge (C)

Mirror Equation

Optics
1/f = 1/d_o + 1/d_i

Relates focal length to object and image distances for mirrors.

f = Focal length (m)
d_o = Object distance (m)
d_i = Image distance (m)

Index of Refraction

Optics
n = c / v

Refractive index is the ratio of speed of light in vacuum to speed in medium.

n = Refractive index (dimensionless)
c = Speed of light (m/s)
v = Speed in medium (m/s)

Mass-Energy Equivalence

Modern Physics
E = m·c²

Einstein's mass-energy equivalence. c = 3 × 10⁸ m/s.

E = Energy (J)
m = Mass (kg)
c = Speed of light (m/s)

Photon Energy

Modern Physics
E = h·f

Energy of a photon. h = 6.626 × 10⁻³⁴ J·s (Planck constant).

E = Energy (J)
h = Planck constant (J·s)
f = Frequency (Hz)

Häufig gestellte Fragen

Was ist der Physics Formula Lookup & Calculator?

Der Physics Formula Lookup & Calculator ist ein kostenloses Online-Tool, mit dem du über 80 Physikformeln nach Thema suchen kannst, samt Variablendefinitionen und einem Rechner, der nach jeder Variablen auflöst. Er läuft vollständig in deinem Browser, ohne Installation oder Anmeldung.

Welche Themen werden abgedeckt?

Mechanik, Wellen, Thermodynamik, Elektrizität und Magnetismus sowie Optik – sie decken den Großteil der Physik der Oberstufe und der Einführungskurse an der Universität ab.

Kann ich es als Rechner verwenden?

Ja — bei den meisten Formeln kannst du bekannte Werte eingeben und nach jeder unbekannten Variablen auflösen.

Ist es kostenlos?

Ja, völlig kostenlos.

Sind meine Daten mit diesem Tool sicher?

Absolut. Der Physics Formula Lookup & Calculator verarbeitet alles clientseitig in deinem Browser. Es werden keine Daten auf einen Server hochgeladen oder dort gespeichert. Deine Inhalte bleiben jederzeit privat auf deinem Gerät.

Funktioniert der Physics Formula Lookup & Calculator auf Mobilgeräten?

Ja, der Physics Formula Lookup & Calculator ist vollständig responsiv und funktioniert auf Smartphones und Tablets. Du kannst ihn auf jedem Gerät mit einem modernen Webbrowser nutzen – ohne App-Download.

Muss ich ein Konto erstellen, um dieses Tool zu nutzen?

Es ist kein Konto und keine Registrierung erforderlich. Öffne einfach den Physics Formula Lookup & Calculator in deinem Browser und beginne sofort mit der Nutzung. Es gibt keine Anmeldeschranken oder Nutzungsbeschränkungen.

Wie verwende ich den Physics Formula Lookup & Calculator?

Gib einfach deine Eingabe in das vorgesehene Feld ein, passe die Einstellungen nach Wunsch an, und das Tool verarbeitet sie sofort. Anschließend kannst du das Ergebnis in die Zwischenablage kopieren oder herunterladen.

Welche Browser werden unterstützt?

Der Physics Formula Lookup & Calculator funktioniert in allen modernen Browsern, einschließlich Chrome, Firefox, Safari, Edge und Opera. Für das beste Erlebnis verwende die neueste Version deines bevorzugten Browsers.

Über Kostenlose Physik-Formelsuche und -Rechner

Kostenlose Physik-Formelsuche und -Rechner ist ein kostenloses, browserbasiertes Tool aus unserer Dienstprogramme-Sammlung. Alles läuft lokal auf deinem Gerät — keine Uploads, keine Anmeldung, und deine Daten bleiben privat.

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