Translation guide
The English word "extrapolation" refers to estimating or concluding something beyond the known data or situation. In Japanese, there is no single perfect equivalent; the best choice depends on whether you mean mathematical estimation, logical inference, or projecting a trend into the future.
Estimating an unknown value from known data points, especially in math, science, or data analysis.
The technical term for mathematical extrapolation. Used in statistics, engineering, and scientific contexts.
このグラフから外挿すると、来年の売上は約10%増加すると予測されます。
Extrapolating from this graph, next year's sales are predicted to increase by about 10%.
A less common synonym for 外挿, also meaning extrapolation in technical contexts.
補外法を用いて未知のデータを推定する。
Estimate unknown data using extrapolation methods.
Drawing a conclusion or making a prediction based on limited information, often in everyday or business contexts.
A general term for conjecture, guess, or inference. Commonly used when extrapolating from available facts.
現在の傾向から推測すると、この問題はさらに深刻化するだろう。
Extrapolating from current trends, this problem will likely become more serious.
Estimation or presumption based on evidence. Slightly more formal than 推測, often used in reports or analysis.
Analogical reasoning; inferring something by comparing with similar cases. Can be used for extrapolation in a broader sense.
Specifically extending a current trend or pattern forward in time to predict future outcomes.
A natural phrase meaning 'to predict the future.' Often used when extrapolating trends.
このデータを基に将来を予測するのは難しい。
It's difficult to extrapolate the future from this data.
A pattern meaning 'to infer or gauge something from something.' Useful for expressing extrapolation in a nuanced way.
過去の実績から将来の成長を推し量る。
Extrapolate future growth from past performance.
There is no single Japanese word that covers all uses of 'extrapolation.' Using 外挿 in everyday conversation will sound overly technical. Choose a phrase like 推測 or 推定 for general contexts.
彼の話から推測すると、プロジェクトは遅れているようだ。
Extrapolating from what he said, the project seems to be behind schedule.
過去のデータから推定して、来月の需要を予測します。
We estimate next month's demand by extrapolating from past data.
この事例から類推すれば、他の地域でも同様の結果が期待できる。
Extrapolating from this case, we can expect similar results in other regions.