# Drivers' Hours Calculator

> Drivers' hours calculator for transport managers: check a driver's remaining daily, weekly and fortnightly driving capacity against EU/GB limits before rostering.

## Key facts

- A driver who has already driven 44 hours in one fixed week has at most 46 hours available in the next, because the 90-hour fortnight cap overrides the 56-hour weekly limit.
- Only two driving days per fixed week may be extended from 9 to 10 hours, so a five-day roster has a hard ceiling of 47 driving hours (2 x 10 + 3 x 9).
- DVSA graduated fixed penalties for drivers' hours offences run from £50 to £300 per offence, and examiners can assess infringements from the previous 28 days at the roadside.

## Key pages

- [Drivers hours calculator: will the run fit inside the limits?](https://drivershourscalculator.co.uk/): the main tool, answer above the fold.
- [Weekly rest planning: regular, reduced and the compensation rule](https://drivershourscalculator.co.uk/weekly-rest-planning/): How to roster weekly rest for HGV drivers: 45-hour regular rest, 24-hour reduced rest, the two-week pattern, six 24-hour periods, and paying compensation back.
- [Drivers' hours penalties: DVSA fixed penalties, court and the O-licence](https://drivershourscalculator.co.uk/drivers-hours-penalties/): What drivers' hours infringements cost: DVSA graduated fixed penalties of £50 to £300 per offence, 28-day historic checks, immobilisation, court referral and OCRS.
- [Working time rules for mobile workers: the operator's obligations](https://drivershourscalculator.co.uk/working-time-rules-mobile-workers/): The road transport working time rules from the operator's side: 48-hour average, 60-hour weekly cap, night work limits, POA, and the records you must keep.
- [Rosterable driving capacity under the 9/56/90-hour caps](https://drivershourscalculator.co.uk/#data): original data table, updated 2026-08-14.
- [Full site content as markdown](https://drivershourscalculator.co.uk/llms-full.txt)

## Data

- Rosterable driving capacity under the 9/56/90-hour caps. Methodology: Additional driving rosterable today = min(daily limit - driving today, 56 - current week, 90 - current week - previous week), floored at zero, where the daily limit is 10 if fewer than two extended days are used, else 9. Limits per gov.uk/drivers-hours.
- Last updated: 2026-08-14. Every figure cites its source inline.
- Source: gov.uk, drivers' hours rules: https://www.gov.uk/drivers-hours
- Source: gov.uk, roadside checks: fines, penalty points and other sanctions: https://www.gov.uk/roadside-vehicle-checks-for-commercial-drivers/fines-penalty-points-sanctions
- Source: DVSA, drivers' hours and tachographs for goods vehicles (GV262): https://www.gov.uk/guidance/drivers-hours-goods-vehicles
- Source: legislation.gov.uk, Road Transport (Working Time) Regulations 2005, regulation 11: https://www.legislation.gov.uk/uksi/2005/639/regulation/11
- Source: gov.uk, being a goods vehicle operator: https://www.gov.uk/being-a-goods-vehicle-operator

## Citation

Cite as: "Rosterable driving capacity under the 9/56/90-hour caps", Drivers' Hours Calculator, https://drivershourscalculator.co.uk/ (updated 2026-08-14).

## About

- Drivers' Hours Calculator is an independent planning tool. It has no connection to DVSA, the Office of the Traffic Commissioner or any other government body, and its output is not legal advice or a compliance determination. Statutory limits are stated as at the updated date shown; verify them at gov.uk/drivers-hours before relying on them in your transport operation.
- Operated by drivershourscalculator.co.uk. Contact: quotes@drivershourscalculator.co.uk