Rytvae Consulting · Think Right · Invest Right
Bond Duration Calculator
Result
Chart
Show formula & working
Macaulay D = Σ t × PV(CFt) ÷ Price · Modified D = D ÷ (1 + y/f)
% price change ≈ −Modified D × Δy + ½ × Convexity × Δy²
Details
How this works
Duration measures how sensitive a bond's price is to yields — roughly the % price change for a 1% move in yield.
Convexity corrects the estimate for larger moves; the calculator shows both the estimate and the exact repricing.
Frequently asked questions
Why does duration matter for debt funds?
A fund's modified duration tells you how much its NAV may move when interest rates change.
Is duration the same as maturity?
Only for zero-coupon bonds; coupons make duration shorter.