3 Dart Average Calculator

Three-Dart Average Formula

Three-dart average = 3 × credited points ÷ recorded darts. Points = average × darts ÷ 3. Dart budget = 3 × points ÷ average.

Use One Consistent Scoring Record

Enter credited points and the dart count used by the same scorer for that sample. Include misses and unsuccessful scoring attempts according to that system’s convention. Some match statistics charge a full visit for a bust even when fewer darts were physically released, while other records use actual darts. Mixing these conventions changes the denominator and makes comparisons unreliable. This tool performs arithmetic on the recorded count you supply.

A Three-Dart Rate Is Not an Average of Visits

Multiplying by three expresses the per-dart rate on a common three-dart basis. It does not mean every turn used three darts. For 501 credited points in 15 recorded darts, 3 × 501 ÷ 15 = 100.20 points per three darts, and the per-dart equivalent is 33.40. A short finishing visit still belongs in the total using the scorer’s recorded count.

Combine Samples With Proper Weighting

Add credited points and recorded darts across the selected legs, then divide. For example, samples of 300 points in 15 darts and 400 in 30 darts combine to 700 points in 45 darts, giving 46.67 points per three darts. The simple mean of the two separate rates, 60 and 40, would be 50 and would over-weight the shorter sample.

Find a Whole-Point Target

Choose points needed and enter the target average and dart count. An average of 80 across 16 darts requires 80 × 16 ÷ 3 = 426.666667 points. Because a credited total is a whole number, the primary target rounds up to 427 points. The exact threshold is also displayed. This target describes the arithmetic requirement, not a promise that every game remainder can produce that exact total.

Find a Whole-Dart Budget

Choose dart budget and enter credited points plus a positive target average. For 501 points at a target average of 100, the exact threshold is 3 × 501 ÷ 100 = 15.03 darts. The whole-dart budget rounds down to 15: taking 16 would put the resulting average below 100. A zero target does not define a finite budget, and a positive target cannot be reached with zero points.

Bounds and Rounding

Recorded dart counts and credited point totals are whole numbers. A calculated or entered three-dart average must be between zero and 180. Zero points with a positive dart count gives a zero average. The primary average normally shows two decimal places; tiny nonzero averages retain meaningful precision. Whole-point and whole-dart limits use exact decimal arithmetic. Supporting thresholds are labeled approximate and may be rounded for display. Avoid feeding an already rounded average back into an inverse calculation when the original totals are available.

Interpret the Result Carefully

An average summarizes credited scoring rate, not finishing accuracy, opponent strength, or expected match result. Compare the same game format and counting convention, and keep practice-only scoring drills separate from complete double-out legs. This page deliberately uses numerical worked examples instead of assigning unsupported skill tiers. The algebra does not verify whether a particular number of darts could legally finish a specific leg.

Reference Table

Sources

National Dart Association, NDA Rules, Official Skill Rating Procedure, accessed 2026. Calculator Academy, three-dart normalization, weighted averages and inverse thresholds, 2026.