About Numberwright HOS
Numberwright HOS is a set of free hours-of-service planners for US property-carrying truck drivers. It is a planning aid; your ELD record and FMCSA rules are what count. It is part of Numberwright, a small family of practical calculators that show their work.
The tools run entirely in your browser — nothing you type is sent to a server.
Built and maintained by Numberwright. The rules engine follows 49 CFR Part 395 and reproduces FMCSA's published Example 14. Found a mistake? Contact details coming soon.
Sources
- 49 CFR 395.3 — Maximum driving time for property-carrying vehicles (Cornell LII)
10/11/14 hours, 30-minute break, 60/70, 34-hour restart
- 49 CFR 395.1 — Scope of rules; (b) adverse conditions; (e) short-haul; (g) sleeper berths (Cornell LII)
Split-sleeper conditions, adverse +2 h, short-haul scope note
- FMCSA — Summary of Hours of Service Regulations (updated 28 Mar 2022)
Official summary of hours of service regulations
- FMCSA — HOS Examples (PDF, 28 Apr 2022)
Example 14 test vector; Examples 6–8 (restart), 29 (70-hour)
Last reviewed: 2026-10-26