Translation guide
A device in a vehicle that shows how fast it is moving.
The instrument panel gauge showing current speed in a car, motorcycle, etc.
General term for speedometer, used in technical and everyday contexts.
速度計が故障した。
The speedometer broke.
速度計を見ながら運転してください。
Please drive while watching the speedometer.
Hybrid term, less common but occasionally seen.
速度メーターの針が振り切れた。
The speedometer needle went off the scale.
A small digital device mounted on a bicycle to measure speed and distance.
Standard term for a bicycle computer that shows speed, distance, etc.
サイクルコンピューターで速度を確認する。
I check my speed on the cyclocomputer.
For cars and motorcycles, 速度計 (そくどけい) is the most natural and common term. スピードメーター is also widely understood, especially in casual conversation. For bicycles, use サイクルコンピューター.
Common loanword from English, widely understood, especially in casual contexts.
スピードメーターが100キロを示している。
The speedometer is showing 100 km/h.
Descriptive phrase meaning 'speedometer for bicycles', less common but clear.
自転車用速度計を取り付けた。
I installed a bicycle speedometer.