Zero-Coupon bond calculator

A zero-coupon bond pays nothing along the way, only its face at maturity, so its price is the face value discounted back: face divided by one plus the yield over the compounding periods, raised to the number of periods. Finding the yield runs the same equation the other way with a bisection search over the declared rate window, so the answer is as precise as double arithmetic allows. This is a pricing formula, not a valuation: it knows nothing about default risk, taxes, or the shape of the real yield curve.