Investment

Bond Calculator

Estimate a bond's fair price given its face value, coupon rate, current market yield, and time to maturity.

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Adjust any field and recalculate — figures are pre-filled with a typical example.

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How it works

Formula & explanation

Bond Calculator uses the following calculation:

Price = Σ Coupon/(1+y)t + FaceValue/(1+y)n

This is a simplified model intended for planning and education. Real-world offers from lenders, institutions, or tax authorities may include additional fees, rules, or adjustments not reflected here.

FAQ

Frequently asked questions

Why does a bond trade below face value?

When market yields rise above the bond's coupon rate, its price falls so a new buyer earns a competitive effective yield — this is trading 'at a discount.'

What's the relationship between bond prices and interest rates?

They move inversely: as market rates rise, existing bond prices fall, and vice versa.

What is coupon rate versus yield?

Coupon rate is the fixed rate printed on the bond determining its interest payments; yield reflects the actual return based on the price paid.

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