Physics
Mechanics, current, waves and heat. Each formula has its own page.
Mechanics
Angular Momentum Calculator
L=I·ω; I=2 kg·m², ω=5 rad/s → 10 kg·m²/s.
Use calculator →Angular Velocity Calculator
ω=2π/T; T=8 s → 0.785 rad/s.
Use calculator →Centripetal Acceleration Calculator
a=v²/r; 14 m/s, r=40 m → 4.9 m/s².
Use calculator →Centripetal Force Calculator
F=m·v²/r; 75 kg, 18 m/s, r=60 m → 405 N.
Use calculator →Force from Change in Momentum Calculator
F=Δp/Δt; 10 kg·m/s, 0.1 s → 100 N.
Use calculator →Free Fall Time Calculator
t=√(2h/g); 10 m → 1.43 s; 100 m → 4.52 s.
Use calculator →Friction Force Calculator
T=μ·N; μ=0.4, 10 kg → 39.24 N.
Use calculator →Gravitational Acceleration Calculator
g=GM/r²; Earth r=6371 km → 9.82 m/s².
Use calculator →Gravitational Force Calculator
F=G·m₁·m₂/r²; Earth+70 kg → 687.4 N.
Use calculator →Hooke’s Law Calculator
F=k·x; 200 N/m, 0.1 m → 20 N.
Use calculator →Inclined Plane Calculator
a=g·sin α; 30°, 5 m → 4.90 m/s², 1.43 s.
Use calculator →Lever Equilibrium Calculator
F₁r₁=F₂r₂; 20 N, 0.5 m, 0.2 m → F₂=50 N.
Use calculator →Linear Speed from Angular Velocity Calculator
v=ω·r; 10 rad/s, 0.35 m → 3.5 m/s.
Use calculator →Moment of Inertia Calculator (Point Mass)
I=m·r²; 2 kg at 0.5 m → 0.5 kg·m².
Use calculator →Simple Pendulum Period Calculator
T=2π√(l/g); l=1 m → 2.006 s.
Use calculator →Power from Force and Velocity Calculator
P=F·v; 600 N at 25 m/s → 15 kW.
Use calculator →Pressure Calculator
p=F/A; 700 N / 0.02 m² → 35 kPa.
Use calculator →Projectile Maximum Height Calculator
H=v₀²·sin²α/(2g); 20 m/s, 60° → 15.29 m.
Use calculator →Projectile Range Calculator
Z=v₀²·sin(2α)/g; 20 m/s, 45° → 40.77 m.
Use calculator →Rotational Kinetic Energy Calculator
E=½Iω²; I=0.5 kg·m², ω=10 rad/s → 25 J.
Use calculator →Escape Velocity Calculator
v₂=√(2GM/r); Earth 11.19 km/s, Moon 2.38 km/s.
Use calculator →Spring Oscillation Frequency Calculator
f=(1/2π)√(k/m); 200 N/m, 0.5 kg → 3.183 Hz.
Use calculator →Uniform Motion Distance Calculator
s=v·t; 60 mph × 2 h → 120 mi.
Use calculator →Uniformly Decelerated Motion Calculator
s=v₀²/(2a); 14 m/s, 7 m/s² → 14 m, 2 s.
Use calculator →Time from Work and Power Calculator
t=W/P; 300 kJ at 2000 W → 150 s.
Use calculator →Electricity
Capacitive reactance calculator
Capacitive reactance calculator Xc = 1/(2πfC): f [Hz] and C [F].
Use calculator →Capacitor Energy Calculator
E=½CU²; 1 µF, 12 V → 72 µJ.
Use calculator →Current from Power and Voltage Calculator
I=P/U; 1500 W, 120 V → 12.5 A.
Use calculator →Current Calculator
I=Q/t; 10 C, 5 s → 2 A.
Use calculator →Electric Charge Calculator
Q=I·t; 2 A × 10 s → 20 C.
Use calculator →Point Charge Electric Field Calculator
E=k·Q/r²; 1 µC, 0.1 m → 898,755 N/C.
Use calculator →Electrical Work Calculator
Electrical Work Calculator W = U·I·t: U [V], I [A] and t [s].
Use calculator →Parallel Capacitance
Parallel Capacitance Cz = C₁+C₂ calculator: C1 [F] and C2 [F].
Use calculator →Series Capacitance 1/Cz
Series Capacitance 1/Cz = 1/C₁+1/C₂ calculator: C1 [F] and C2 [F].
Use calculator →Inductive reactance calculator
Inductive reactance calculator XL = 2πfL: f and L.
Use calculator →Joule Heat Calculator
Joule Heat Calculator Q = I²·R·t: I, R, and t.
Use calculator →Joule Power Loss Calculator
P=I²·R; 2 A, 10 Ω → 40 W.
Use calculator →Resistance from Ohm's Law Calculator
U=I·R; 0.5 A, 100 Ω → 50 V, 25 W.
Use calculator →Voltage from Power and Current Calculator
U=P/I; 60 W, 0.5 A → 120 V.
Use calculator →Transformer secondary turns
Transformer secondary turns n2 = n1·(U2/U1) calculator: U1, U2, and n1.
Use calculator →Work in an electric field
Work in an electric field W = q·U calculator: q [C] and U [V].
Use calculator →Thermodynamics and energy
Latent heat Q = m·L
Two fields, the same formula as the full fusion page.
Use calculator →Latent Heat of Vaporization Calculator
Latent Heat of Vaporization Calculator: mass and the latent heat of vaporization.
Use calculator →Number of moles calculator
Number of moles calculator n = m/M: mass m [g] and molar mass M [g/mol].
Use calculator →Volumetric Expansion Calculator
Volumetric Expansion Calculator: γ, the starting volume, and the temperature rise.
Use calculator →Waves and optics
Frequency from Period Calculator
f=1/T; T=2 s → 0.5 Hz.
Use calculator →Photon energy from wavelength
Photon energy from wavelength E = hc/λ calculator: wavelength in meters.
Use calculator →Sound intensity calculator
Intensity-from-level calculator I = I0·10^(L/10): Here the unknown is I, not L.
Use calculator →Wave speed calculator
Wave speed calculator v = λ·f: wavelength and frequency.
Use calculator →Wavelength from photon energy
Wavelength from photon energy λ = hc/E calculator: photon energy in electronvolts.
Use calculator →Other
Acceleration Calculator
a=Δv/t; 27.8 m/s, 8 s → 3.48 m/s².
Use calculator →Average Speed Calculator
v=s/t; 18 km, 0.367 h → 49.05 km/h.
Use calculator →Buoyancy calculator
Buoyancy calculator: fluid density ρ [kg/m³] and submerged volume V [m³].
Use calculator →Capacitance calculator
Capacitance calculator: charge Q [C] and voltage U [V].
Use calculator →Capacitor energy calculator
Capacitor energy: C [F] and U [V].
Use calculator →Coulomb's Law Calculator
F=k·q₁·q₂/r²; 1 µC, −2 µC, 0.1 m → −1.7975 N.
Use calculator →Density Calculator
ρ=m/V; 1 kg / 0.001 m³ → 1,000 kg/m³.
Use calculator →Doppler effect calculator
Doppler effect calculator: the source frequency and who is moving.
Use calculator →Efficiency Calculator
Efficiency Calculator: output power P_out [W] and input power P_in [W].
Use calculator →Elastic energy calculator
Elastic energy calculator: k and extension x.
Use calculator →Electric Potential Calculator
Electric Potential Calculator V = W/q: work W [J] and charge q [C].
Use calculator →Electromagnetic induction calculator
Electromagnetic induction calculator: the flux change |ΔΦ| [Wb] and the time Δt [s].
Use calculator →Force from engine power
Force from engine power F = P/v calculator: power P [W] and speed v [m/s].
Use calculator →Engine work calculator
Engine work calculator W = P·t: power P [W] and time t [s].
Use calculator →Terminal speed calculator
Terminal speed calculator v = √(2mg/(ρCS)): mass, area and the drag coefficient.
Use calculator →Electric Field Strength Calculator
Electric Field Strength Calculator E = F/q: force F [N] and charge q [C].
Use calculator →Orbital Velocity Calculator (First Cosmic Velocity)
v₁=√(GM/r); Earth → 7.91 km/s.
Use calculator →Force Calculator
F=m·a; 1,400 kg, 1.8 m/s² → 2,520 N.
Use calculator →Free Fall Calculator
h=½gt²; t=2 s → 19.62 m.
Use calculator →Friction Coefficient Calculator
μ=T/N; 39.24 N / 98.10 N → 0.400.
Use calculator →Heat Calculator
Q=c·m·ΔT; 1 kg water, 10 K → 41,860 J.
Use calculator →Horizontal Throw Calculator
t=√(2h/g); 6 m/s, h=8 m → Z=7.66 m.
Use calculator →Hydrostatic Pressure Calculator
Hydrostatic Pressure Calculator: density ρ and depth h.
Use calculator →Impulse Calculator
J=F·Δt; 100 N · 0.5 s → 50 N·s.
Use calculator →Kinetic Energy Calculator
Ek=½mv²; 1,000 kg, 20 m/s → 200,000 J.
Use calculator →Latent Heat of Fusion Calculator
Latent Heat of Fusion Calculator: mass and the latent heat of fusion.
Use calculator →Thin lens calculator 1/f
Thin lens calculator 1/f = 1/x + 1/y: the object and image distances.
Use calculator →Linear Expansion Calculator
Linear Expansion Calculator: the coefficient α, the starting length, and the temperature rise.
Use calculator →Lorentz force calculator
Lorentz force calculator F = B·I·l: B [T], I [A] and l [m].
Use calculator →Momentum Calculator
p=m·v; 70 kg, 1.4 m/s → 98 kg·m/s.
Use calculator →Ohm's Law Calculator
Ohm's Law Calculator: current in amperes and resistance in ohms.
Use calculator →Linear magnification calculator
Linear magnification calculator p = y/x: the image and object distances.
Use calculator →Oscillation Period Calculator
Oscillation Period Calculator: frequency in hertz and you get the time of one cycle.
Use calculator →Pendulum Period Calculator
T=2π√(L/g); L=1 m → 2.006 s.
Use calculator →Photon energy calculator
Photon energy calculator E = h·f: frequency.
Use calculator →Potential Energy Calculator
Ep=m·g·h; 8 kg, 1.8 m → 141.26 J.
Use calculator →Power Calculator
P=U·I; 120 V · 12.5 A → 1500 W.
Use calculator →Power from Work and Time Calculator
P=W/t; 300,000 J / 150 s → 2,000 W.
Use calculator →Pressure calculator
The calculator divides force F by area A and returns pressure in Pa, kPa, bar, and psi.
Use calculator →Resistors in Parallel Calculator
Resistors in Parallel Calculator: R1 [Ω] and R2 [Ω].
Use calculator →Resistors in Series Calculator
Resistors in Series Calculator: R1 [Ω] and R2 [Ω].
Use calculator →LC resonance calculator
LC resonance calculator f = 1/(2π√(LC)): L [H] and C [F].
Use calculator →Sound level calculator
Sound level calculator L = 10 log(I/I0): intensity I in W/m².
Use calculator →Stefan-Boltzmann law calculator
Stefan-Boltzmann law calculator P = εσAT⁴: area and temperature in kelvin.
Use calculator →Torque Calculator
M=F·r·sin α; 20 N, 0.3 m, 90° → 6 N·m.
Use calculator →Transformer calculator
Transformer calculator: U1 [V], n1 and n2.
Use calculator →Uniform Motion Calculator
s=v·t; 33.33 m/s, 5,400 s → 179,982 m.
Use calculator →Uniformly Accelerated Motion Calculator
s=v₀t+½at²; a=3.5 m/s², 8 s → 112 m.
Use calculator →Vertical Throw Calculator
H_max=v₀²/(2g); 15 m/s → 11.47 m.
Use calculator →Wavelength calculator
Wavelength calculator: wave speed and frequency.
Use calculator →Wire Resistance Calculator
R=ρ·l/S; 1 m, 1 mm² Cu → 0.017 Ω.
Use calculator →Work Calculator
W=F·s; 200 N · 10 m → 2,000 J.
Use calculator →Projectile motion calculator
Projectile motion calculator: v₀, angle, and launch height h₀.
Use calculator →Inclined Plane with Friction Calculator
a=g(sin α−μ cos α); 30°, μ=0.2, 10 m → 3.21 m/s².
Use calculator →Stopping Distance Calculator
s=v·t_r+v²/(2a); 14 m/s, 0.8 s, 7 → 25.20 m.
Use calculator →SUVAT equations calculator
SUVAT equations calculator: exactly three of the five fields.
Use calculator →Articles
Short guides for the formulas in this category. Each article leads to a calculator.