A vernier throttle is a throttle often used in aircraft.^{[citation needed]} It uses a cable and a screw mechanism to provide the operator precise control over an engine's operation.^{[citation needed]} The concept is similar in use to vernier calipers which have a primary scale for gross measurements, and a secondary scale for fine measurements. Like other inventions that bear his name, the Vernier throttle is based on the work of mathematician Pierre Vernier.

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Vernier throttles are commonly used in aircraft.^{[citation needed]} A similar mechanism is also used in reciprocating (gasoline) aircraft engines to set the mixture to an appropriate value for a given altitude.^{[citation needed]}

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