Hand formula
| Part of the common law series |
| Tort law |
|---|
| (Outline) |
| Trespass to the person |
| Property torts |
| Dignitary torts |
| Negligent torts |
| Principles of negligence |
| Strict and absolute liability |
| Nuisance |
| Economic torts |
|
| Defences |
| Liability |
| Legal remedy |
| Other topics in tort law |
|
| By jurisdiction |
| Other common law areas |
The Hand formula, also known as the Hand rule, calculus of negligence, or BPL formula, is a conceptual formula created by United States Judge Learned Hand, which describes a process for determining whether a legal duty of care has been breached (constituting negligence). The original description of the calculus was in United States v. Carroll Towing Co., in which an improperly secured barge had drifted away from a pier and caused damage to several other boats.