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Spending Multiplier Calculator

Estimate the total economic impact of an initial spending injection by applying the Keynesian multiplier based on marginal propensity to consume.

Initial spending
$
Marginal propensity to consume (MPC)
ratio
Number of rounds
Spending multiplier4.00
Propensity to save (MPS)0.250
Additional GDP impact$0
MPC benchmarks:
Low income: 0.8–0.9
Average economy: 0.7–0.75
High income: 0.4–0.6
Total economic impact
$ 0
Multiplier of 4.00 (High impact)
Total impact is the theoretical limit (infinite rounds).
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