Marginal Product of Labour Calculator
Estimate output change per labour unit between two observations while holding other inputs fixed.
Both points need nonnegative labour and output, matching units and the same production period. Hold capital, technology and other inputs constant. Labour must differ; either direction is allowed and the estimate may be negative. This finite difference is the average slope over the L₁–L₂ interval, not an exact derivative at a point. It is not average output Q/L, a wage or a hiring recommendation.
Inputs stay in this browser; no data is fetched.
Conceptual reference: Western University
A QUICK WALKTHROUGH
How to use this tool
- Estimate output change per labour unit between two observations while holding other inputs fixed.
- Both points need nonnegative labour and output, matching units and the same production period. Hold capital, technology and other inputs constant. Labour must differ; either direction is allowed and the estimate may be negative. This finite difference is the average slope over the L₁–L₂ interval, not an exact derivative at a point. It is not average output Q/L, a wage or a hiring recommendation.
- Calculate
Formula
ΔL = L₂ − L₁; ΔQ = Q₂ − Q₁; MPL ≈ ΔQ / ΔL.
Assumptions and limits
Both points need nonnegative labour and output, matching units and the same production period. Hold capital, technology and other inputs constant. Labour must differ; either direction is allowed and the estimate may be negative. This finite difference is the average slope over the L₁–L₂ interval, not an exact derivative at a point. It is not average output Q/L, a wage or a hiring recommendation.
Local processing
Inputs stay in this browser; no data is fetched.
GOOD TO KNOW
Common questions
Assumptions and limits
Both points need nonnegative labour and output, matching units and the same production period. Hold capital, technology and other inputs constant. Labour must differ; either direction is allowed and the estimate may be negative. This finite difference is the average slope over the L₁–L₂ interval, not an exact derivative at a point. It is not average output Q/L, a wage or a hiring recommendation.