Technology & Computing
Halstead Software Metrics Calculator
Compute Halstead volume, difficulty, effort, estimated coding time and predicted bug count from operator/operand counts.
Your inputs
Change any value to update the result instantly.
Halstead volume
1,482.8003 bits
Difficulty
37.5
Effort
55,605.0126
Estimated coding time
0.8581 hrs
Predicted bugs
0.4943
Effort is divided by Stroud's constant (18 elementary discriminations/sec) to estimate implementation time; bugs use Halstead's Volume/3000 heuristic.
Formula and working
Volume = N × log2(n); Difficulty = (n1/2) × (N2/n2); Effort = Difficulty × Volume; Bugs ≈ Volume ÷ 3000
- 1
Collect the inputs
Distinct operators (n1) = 15; Distinct operands (n2) = 30; Total operator occurrences (N1) = 120; Total operand occurrences (N2) = 150
- 2
Apply the formula
Volume = N × log2(n); Difficulty = (n1/2) × (N2/n2); Effort = Difficulty × Volume; Bugs ≈ Volume ÷ 3000
- 3
Result
Halstead volume = 1,482.8003 bits
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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