Translation guide
The English verb 'calculate' covers a range of meanings from mathematical computation to careful planning and estimation. In Japanese, different words and expressions are used depending on the nuance: performing arithmetic, computing a value, estimating an outcome, or scheming. This guide helps learners choose the most natural Japanese equivalent for each intended meaning.
To perform a mathematical operation to find a number or amount, such as adding, subtracting, multiplying, or dividing.
The most common and general verb for 'calculate'. Used for any kind of mathematical calculation, from simple arithmetic to complex formulas.
電卓で合計を計算した。
I calculated the total with a calculator.
Please calculate this formula.
More formal and often used in technical, business, or official contexts. Emphasizes deriving a specific numerical result through calculation.
経費を算出する必要がある。
We need to calculate the expenses.
Used in legal, accounting, or official contexts for calculating amounts like taxes, fees, or damages based on set rules.
税金を算定する。
Calculate the tax.
To judge or estimate something such as cost, time, risk, or outcome, often without exact numbers.
To estimate a cost, amount, or time. Commonly used in business and daily life for quotes or rough calculations.
修理費を見積もってもらった。
I had them calculate (estimate) the repair costs.
必要な時間を見積もる。
Calculate (estimate) the time needed.
To make a trial calculation or provisional estimate, often before finalizing numbers. Used in planning or budgeting.
予算を試算する。
Calculate a tentative budget.
To figure out a way to manage or arrange something, often money or resources. Implies resourcefulness.
なんとか資金を算段する。
Somehow calculate (scrape together) the funds.
To carefully plan something, often with a selfish or cunning motive.
Also used metaphorically for calculating one's actions to gain advantage. Often implies cold, strategic thinking.
彼はいつも自分の利益を計算して動く。
He always acts after calculating his own benefit.
To scheme or plot. Stronger negative nuance than 計算する. Used for secret plans, often malicious.
彼は何か企んでいるようだ。
He seems to be calculating (scheming) something.
To plan or maneuver behind the scenes, often in politics or business. Formal and somewhat literary.
彼らは政権奪取を画策している。
They are calculating (plotting) to seize power.
To count items or add up numbers, often in a simple or mechanical way.
To count individual items. Not strictly 'calculate', but often used when the calculation is just counting.
人数を数えてください。
Please calculate (count) the number of people.
To total up or aggregate numbers, often used for survey results or sales data.
アンケート結果を集計する。
Calculate (tabulate) the survey results.
計算する is for precise mathematical calculation. 見積もる is for rough estimation, like a cost estimate. Use 計算する when you have exact numbers and a formula; use 見積もる when you are making an educated guess.
旅費を計算する（正確な金額を出す）
Calculate travel expenses (get an exact amount)
旅費を見積もる（だいたいの金額を予想する）
Estimate travel expenses (guess a rough amount)
While 計算する can be used metaphorically for scheming, it is not natural for all English uses of 'calculate'. For example, 'calculate the risk' is better as リスクを評価する (evaluate risk) or リスクを見積もる (estimate risk). Using 計算する for abstract concepts can sound unnatural unless the context implies numerical or strategic thinking.
投資する前にリスクを評価する必要がある。
We need to calculate the risks before investing.
Natural Japanese uses 評価する (evaluate) rather than 計算する for abstract risk.
彼は借りたほうが安いと計算した。
He calculated that it would be cheaper to rent.
Metaphorical use of 計算する is acceptable here because it implies a numerical comparison.