Physics MachinesSI Units

PHYCAL

The Ultimate Physics Machine Calculator

Calculate work input, work output, energy wasted, mechanical advantage, and efficiency — with instant formula explanations and visual results.

5 Calculators

All machine formulas

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8 tools
η = (WO ÷ WI) × 100

Efficiency

Determine how effectively a machine converts input energy into useful work output. Essential for evaluating machine performance.

Work Output (J)Work Input (J)→Efficiency [%]
Interactive calculatorCalculate
MA = L ÷ E

Mechanical Advantage

Calculate how many times a machine multiplies the applied force. Ratios above 1 indicate force amplification.

Load (N)Effort (N)→MA Ratio [—]
Interactive calculatorCalculate
MA = n | E = L ÷ n

Pulleys

Calculate the effort force, mechanical advantage, and work in pulley systems. More pulleys means less effort needed.

Load (N)No. of PulleysRope Distance (m)→Effort Force [N]
Interactive calculatorCalculate
MA = l ÷ h

Inclined Planes

Find the effort needed to push a load up a ramp. A longer, shallower ramp reduces the required force.

Load (N)Length (m)Height (m)→Effort Force [N]
Interactive calculatorCalculate
MA = EA ÷ LA

Levers

Compute effort force and mechanical advantage for Class 1, 2, and 3 levers using the principle of moments.

Load (N)Load Arm (m)Effort Arm (m)→Effort Force [N]
Interactive calculatorCalculate
WI = E × d

Work Input

Calculate the total energy supplied to a machine by multiplying the applied effort force by the distance moved.

Effort (N)Distance (m)→Work Input [J]
Reference only
WO = L × d

Work Output

Find the useful energy produced by a machine — the load force multiplied by the distance the load moves.

Load (N)Distance (m)→Work Output [J]
Reference only
EW = WI − WO

Energy Wasted

Compute the energy lost to friction, heat, and sound — the difference between what you put in and useful work out.

Work Input (J)Work Output (J)→Energy Wasted [J]
Reference only

Formula Quick Reference

All physics machine formulas at a glance

WIJ

Work Input

WI = Effort × Distance

WOJ

Work Output

WO = Load × Distance

EWJ

Energy Wasted

EW = WI − WO

MA—

Mechanical Advantage

MA = Load ÷ Effort

η%

Efficiency

η = (WO ÷ WI) × 100

All calculations use SI units — Joules (J), Newtons (N), and percentage (%)