Translation

見積もる / 推定する / 概算する

Meaning

Estimate means to calculate or judge an amount, cost, size, time, or value without exact information. It is useful when you have evidence but not certainty. The trap is treating an estimate like a final price or exact number.

Examples

• 修理費は約500ドルと見積もられています。
  They estimate the repair cost at about $500.
• 警察は群衆を2万人と推定しました。
  The police estimated the crowd at 20,000 people.