Archery Sight Mark Calculator

The calculator uses two known sight mark and distance pairs to fit a mathematical curve (a power or quadratic relationship) that models how your sight mark changes with distance. It then extrapolates this curve to estimate sight marks at all other standard archery distances. The further apart your two reference points are, the more accurate the curve fitting will be.

Yes. Each reference point has its own unit selector, so you can enter one sight mark in yards and another in meters. The calculator automatically converts everything to a common unit (meters) before performing the curve fit, then displays results in both yards and meters.

A wider separation between your two known distances gives the algorithm more leverage to accurately define the curvature of your sight mark progression. Two closely spaced reference points produce a poorly constrained curve, leading to larger errors at distant targets.

No. Unlike ballistic calculators that require arrow speed data, this tool only needs two real-world sight mark measurements you have already shot and confirmed on the range. No chronograph or arrow speed data is required.

The estimates are mathematical approximations based on your two reference points. Individual variations in arrow flight, bow tuning, shooting form, and atmospheric conditions mean the estimates serve as a starting point. You should always verify and fine-tune each mark at the range.

The table covers standard archery distances: 10, 15, 18, 20, 25, 30, 40, 50, 60, 70, 80, 90, and 100 yards (with meter equivalents shown alongside). These cover the most commonly shot indoor and outdoor distances in target archery.

Absolutely. If you have shot two distances and noted down where your sight pin was set, you can use those two marks to get a sensible starting estimate for all other distances. It saves significant time when setting up a new sight or bow.

Yes. The calculator is bow-agnostic — it only relies on the relationship between your sight mark settings and distances, which applies to any style of bow that uses a sight. Compound, recurve, and longbow (with a sight) setups can all benefit from this tool.