Physics calculators

Kinematics, dynamics, and classical-physics shortcuts.

Solve the common physics textbook calculations — velocity, acceleration, force, and energy — with units correctly tracked end to end.

Calculators

372

Topics: All Mechanics (114) Electricity (48)

Physics / Mechanics

Factor of Safety from Yield and Applied Stress Calculator

Calculates factor of safety FOS = σ_yield / σ_applied. FOS < 1 → failure; 1.5 = minimum structural; 3+ = critical safety...

basic

17,671 4.3 1 min

Physics

Specific Heat Capacity Energy Transfer Calculator

Calculates the heat energy transferred to or from a substance using Q = mcΔT. Enter mass, specific heat capacity, and te...

basic

11,931 4.3 1 min

Physics

Gear Ratio Speed & Torque Calculator

Calculates gear ratio, output speed (RPM), and output torque from input speed, input torque, gear teeth counts, and tran...

basic

10,124 3.8 1 min

Physics

Wind Turbine Betz Power Output Calculator

Calculates the theoretical and actual power output of a wind turbine from wind speed, rotor diameter, air density, and p...

basic

9,456 4.9 1 min

Physics

Moody Chart Friction Factor from Reynolds Number and Roughness Calculator

Approximates the Darcy–Weisbach friction factor using the Colebrook–White equation (Churchill approximation): 1/√f = −2·...

basic

3,930 4.2 1 min

Physics

Battery Amp-Hour & Runtime Calculator

Calculates battery runtime from capacity (Ah), load current, depth of discharge, and battery efficiency.

basic

23,671 4.5 1 min

Physics

Rankine Cycle Efficiency and Work Output Calculator

Calculates the thermal efficiency and net specific work output of a Rankine steam power cycle from four state-point enth...

basic

19,771 4.3 1 min

Physics

Three-Phase Apparent Power (kVA) Calculator

Calculates apparent power (kVA), active power (kW), and reactive power (kVAR) for a three-phase AC system from line volt...

basic

14,547 4.6 1 min

Physics

Electric Motor Efficiency from Input and Output Power Calculator

Calculates motor efficiency η = P_output / P_input, losses = P_in − P_out, and input current at a given voltage. Typical...

basic

13,009 4.6 1 min

Physics

Solar PV Panel Daily Energy Generation Calculator

Calculates the daily energy output of a solar PV panel from peak watts, peak sun hours, panel efficiency, and temperatur...

basic

11,217 4.3 1 min

Physics

Thermal Expansion of a Solid Calculator

Calculates linear thermal expansion ΔL = α·L₀·ΔT, volumetric expansion ΔV = 3α·V₀·ΔT, and final dimensions for a solid w...

basic

7,257 4.1 1 min

Physics

Network Host Count from CIDR Prefix Length Calculator

Calculates the number of usable hosts per subnet = 2^(32−prefix) − 2, total addresses = 2^(32−prefix), and the subnet ma...

basic

3,639 4.4 1 min

Physics / Mechanics

Thin-Walled Pressure Vessel Hoop Stress Calculator

Calculates hoop (circumferential) stress σ_h = P·r/t and longitudinal stress σ_l = P·r/(2t) in a thin-walled pressure ve...

basic

20,926 5.0 1 min

Physics

Solar Panel Daily Energy Output Calculator

Estimates daily and monthly energy output from a solar panel array from rated power, peak sun hours, and system efficien...

basic

18,946 4.2 1 min

Physics

LED Forward Voltage & Current-Limit Resistor

Calculates the series current-limiting resistor value needed to protect an LED from a supply voltage given its forward v...

basic

18,297 4.8 1 min

Physics

Three-Phase Power from Line Voltage, Current, and Power Factor Calculator

Calculates real power P = √3·V_L·I_L·PF, reactive power Q = √3·V_L·I_L·sin(arccos PF), apparent power S = √3·V_L·I_L, an...

basic

17,450 4.2 1 min

Physics

Beam Second Moment of Area (I) Calculator

Calculates second moment of area (moment of inertia), section modulus, and radius of gyration for rectangular and I-sect...

basic

15,751 4.8 1 min

Physics

Compressible Flow Mach Number from Velocity Calculator

Calculates the Mach number for compressible gas flow from flow velocity, specific heat ratio γ, gas constant R, and stat...

basic

9,600 4.0 1 min

Physics

Wind Turbine Betz Energy Output Calculator

Calculates wind turbine power output from rotor diameter, wind speed, air density, and power coefficient Cp (max Betz li...

basic

24,027 4.9 1 min

Physics

Thermal Resistance from Material Thickness and Area Calculator

Calculates thermal resistance R_th = L/(k·A), where L is thickness, k is thermal conductivity, and A is cross-sectional...

basic

22,864 4.0 1 min

Physics

S-N Curve Fatigue Life Cycle Calculator

Estimates fatigue life (cycles to failure) from applied stress amplitude and S-N curve parameters (ultimate strength and...

basic

18,126 4.8 1 min

Physics

Conductor Voltage Drop Calculator

Calculates voltage drop along a two-conductor cable run from current, cable resistance per km, and cable length.

basic

15,134 3.9 1 min

Physics

Hydraulic Radius and Manning Flow Velocity Calculator

Calculates hydraulic radius, flow velocity, and volumetric flow rate for open-channel or pipe-full flow using Manning's...

basic

10,531 4.1 1 min

Physics / Mechanics

Gear Ratio and Output Speed from Teeth Count Calculator

Calculates gear ratio GR = T₂/T₁, output RPM = input RPM / GR, output torque = input torque × GR × η, and pitch line vel...

basic

2,441 4.6 1 min

Showing 337 to 360 of 372 results

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Solve the common physics textbook calculations — velocity, acceleration, force, and energy — with units correctly tracked end to end.

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Physics calculators

Factor of Safety from Yield and Applied Stress Calculator

Specific Heat Capacity Energy Transfer Calculator

Gear Ratio Speed & Torque Calculator

Wind Turbine Betz Power Output Calculator

Moody Chart Friction Factor from Reynolds Number and Roughness Calculator

Battery Amp-Hour & Runtime Calculator

Rankine Cycle Efficiency and Work Output Calculator

Three-Phase Apparent Power (kVA) Calculator

Electric Motor Efficiency from Input and Output Power Calculator

Solar PV Panel Daily Energy Generation Calculator

Thermal Expansion of a Solid Calculator

Network Host Count from CIDR Prefix Length Calculator

Thin-Walled Pressure Vessel Hoop Stress Calculator

Solar Panel Daily Energy Output Calculator

LED Forward Voltage & Current-Limit Resistor

Three-Phase Power from Line Voltage, Current, and Power Factor Calculator

Beam Second Moment of Area (I) Calculator

Compressible Flow Mach Number from Velocity Calculator

Wind Turbine Betz Energy Output Calculator

Thermal Resistance from Material Thickness and Area Calculator

S-N Curve Fatigue Life Cycle Calculator

Conductor Voltage Drop Calculator

Hydraulic Radius and Manning Flow Velocity Calculator

Gear Ratio and Output Speed from Teeth Count Calculator